Thermophysical Properties Of Materials Research Articles

Modeling and Measuring Thermodynamic and Transport Thermophysical Properties: A Review

The present review describes the up-to-date state of the evaluation of thermophysical properties (TP) of materials with three different procedures: modeling (also including inverse problems), measurements and analytical methods (e.g., through computing from other properties). Methods to measure specific heat and thermal conductivity are described in detail. Thermal diffusivity and thermal effusivity are a combination of the previously cited properties, but also for these properties, specific measurement and calculation methods are reported. Experiments can be carried out in steady-state, transient, and pulse regimes. For modeling, special focus is given to the inverse methods and parameter estimation procedures, because through them it is possible to evaluate the thermophysical property, assuring the best practices and supplying the measurement uncertainty. It is also cited when the most common data processing algorithms are used, e.g., the Gauss–Newton and Levenberg–Marquardt least squares minimization algorithms, and how it is possible to retrieve values of TP from other data. Optimization criteria for designing the experiments are also mentioned.

Ex‐Ante Optimal Design of Sustainable Phase Change Materials for Latent Heat Storage

AbstractEnergy consumption for residential heating can be reduced using new insulation solutions in the form of phase change materials (PCMs) integrated within the building structure. This work proposes a framework for the optimal design of PCMs considering operational as well as sustainability aspects at the early stages of the material development process. The proposed framework applies computer‐aided molecular design tools and considers a practical simulation model to calculate the functional performance of the PCM, as well as a variety of constraints to impose desirable bounds on the material thermophysical properties and its impact on environment and safety.

Assessment of fire resistance of fireproof reinforced concrete structures

A finite-element model for the heat engineering calculation of fireproof reinforced concrete slab has been built, which is designed to assess the fire resistance of unprotected reinforced concrete structures. A feature of the model is the correct choice of types of heat transfer in the cavities of reinforced concrete ceilings. An algorithm that includes experimental and calculation procedures in determining the fire resistance of unprotected reinforced concrete structures has been applied. The initial, boundary conditions for the construction of the model were formulated; the thermophysical properties of materials were substantiated. Thermal calculation of fireproof multi-hollow reinforced concrete ceiling under conditions of fire was carried out. The adequacy of the developed finite-element model was checked. A satisfactory convergence of experimental and calculated temperatures with an accuracy of 10 % was established, which would suffice for the engineering calculations. The model built makes it possible to assess the fire resistance of unprotected reinforced concrete structures. Thus, there is reason to argue that the model constructed can partially or completely replace the experimental assessment of fire resistance, provided that the construction and setting of the model parameters are correct

Determining the influence of a filler on the properties of composite materials based on Phenylone C2 for tribojunctions in machines and assemblies

The introduction of polymer-composite materials makes it possible not only to solve the problem of increasing durability, reducing the mass and cost of machines, but also, by introducing fillers, to adapt them to the required operating conditions. At the same time, there is a problem regarding the high cost of technologies for obtaining composites, which limits their widespread implementation. That is why the object of this research is the processes of influence of the filler on the characteristics and properties of polymer-composite materials. Complex laboratory studies of physical and mechanical characteristics, tribological and thermophysical properties of the developed polymer-composite materials based on Phenylone C2 were carried out. The dependence of the coefficient of friction and wear of the material based on Phenylone C2, containing thermally expanded graphite, on the pressure and nature of counter-bodies during friction with lubrication and without it was established. It was revealed that the minimum amount of wear of the material, with friction with lubrication, is achieved under the pressure on tribojunction of 5 MPa. It was established that with an increase in the concentration of filler from 5 to 25 wt% the coefficient of thermal conductivity increases by 4–40.8 %, compared with that non-filled with Phenylone C2. It was found that the introduction of thermally expanded graphite into Phenylone C2 in the amount of 5 wt % leads to a decrease in heat capacity by 34 %. The proposed technology of obtaining polymer-composite materials in the electromagnetic field provides sufficient physical and mechanical characteristics, tribological properties and low cost of finished products (parts). The results reported here make it possible to adapt the physical and mechanical characteristics, thermophysical and tribological properties of polymer-composite materials to certain modes of operation of movable junctions

Effects of various types of nanomaterials on PCM melting process in a thermal energy storage system for solar cooling application using CFD and MCMC methods

• A vertical shell and tube LHTES unit where D-mannitol was utilized as the PCM on the shell side was numerically analyzed. • Ag, Cu, Al 2 O 3 , CuO, TiO 2 , GNP, MWCNT, and SWCNT were added to PCM to enhance its thermophysical properties. • CFD and, a method based on Bayesian inference, was adopted by coding the Bayesian MCMC simulation for predicting the melting time. • Adding carbon-based nanomaterials to pure PCM reduced the melting time by about 50%, while metal nanoparticles impaired the melting performance. • Adding metal oxide nanoparticles did not add any essential advantage to the LHTES system. Latent heat thermal energy storage (LHTES) systems are attractive for bridging the energy supply and demand gap. In such systems, reducing storage time is critical, especially for solar applications. Accordingly, this study mainly aims to employ various nano-additives, including metal (Ag and Cu) and metal-oxide (Al 2 O 3 , CuO, and TiO 2 ) nanoparticles and carbon-based nanomaterials (GNP, MWCNT, SWCNT), to improve the thermophysical properties of pure phase change materials (PCM) to accelerate the melting process. For this purpose, the energy storage performance was numerically analyzed in a vertical shell and tube LHTES unit where D-mannitol was utilized as the PCM on the shell side. Dynalene-ht was employed as a heat transfer fluid (HTF) in the tube. Using computational fluid dynamics (CFD) modeling, transient variations in liquid fraction, PCM temperature, and total melting time were investigated under the impact of the following parameters: the thermophysical properties and volume fraction of nanomaterials, Re and the inlet temperature of HTF. In addition, a methodology based on Bayesian inference was adopted by coding the Bayesian MCMC simulation to create proper models for predicting the melting time. The numerical results showed that adding carbon-based nanomaterials to pure PCM reduced the melting time by about 50%, while metal nanoparticles impaired the melting performance. It was also observed that adding metal oxide nanoparticles did not add any essential advantage to the LHTES system. This research will help design TES applications in the operating temperature range of 160–200 °C, especially in solar cooling systems.

Сравнительная оценка электроэрозионной стойкости материалов в жидкой и газообразной средах

The results of experimental studies and a comparative analysis of changes in the electroerosive resistance of materials during electroerosive machining in liquid and gaseous working media are represented. Based on experimental data, the mathematical models of the dependence of electroerosive resistance on the thermophysical properties of materials for the conditions of both media were obtained. It is established that when replacing the liquid interelectrode medium with a gaseous one, which is observed during electroerosion stitching of deep cavities and holes, the degree of influence of the heat capacity, density, thermal conductivity and board temperature of the material on its electrical erosion resistance changes reiteratedly.

Development of a Methodology for Calculating the Stress State and Resource of a Hydrogen Generator Using the Finite Element Method

An experimental stand was created to study the thermobaric and chemical influence of hydrogen on the identification of hydrocarbon production. The said stand allows to reproduce chemical-technological processes as close as possible to real formation ones. This stand makes it possible to study the kinetics of not only hydrogen, thermobaric and chemical effects, but also other thermal gas chemical processes, including hydrogen generation. The main element of the experimental stand is a hydrogen generator, the components of which work at high pressures and temperatures under conditions of hydrogen embrittlement of mechanical properties and an aggressive environment that causes corrosion of its inner surface. Based on this, the development of a methodology for calculating the thermal stress state of the generator, its strength under hydrogen embrittlement conditions, and its resource becomes relevant. Based on the finite element method, a methodology for calculating non-stationary temperature fields and the thermal stress state that occur in the hydrogen generator during thermobaric and chemical processes of varying intensity is proposed. The methodology allows to take into account the features of the geometry of the structure, the time-varying temperature and pressure distributions of the reaction products, the temperature dependence of the thermophysical and mechanical properties of the hydrogen generator material. Thanks to the application of the developed software, a study of the hydrogen generator thermal stress state during two real thermobaric and chemical processes of different intensity was carried out. Graphs of temperature and pressure changes of the reaction products of hydroreactive substances in the generator over time, which were registered during the experiment conduction, were used. The distribution of non-stationary temperature fields and stresses in the hydrogen generator elements was obtained. Areas of maximum load of generator elements are defined. It was established that during the flow of the studied thermobaric and chemical processes, pressure makes a greater contribution to the thermal stress state. The obtained results and the developed theory and software can be used in the study of generators of other designs with other thermobaric and chemical processes occurring in them.

STUDY OF THE EFFECT OF ZCO CERAMIC PHASE COMPOSITION ON OPTICAL AND THERMOPHYSICAL PROPERTIES

The work is devoted to the study of optical and thermophysical properties of promising materials for nuclear power of a new generation - inert matrices of nuclear dispersed fuel based on ZrO2 – CeO2 (ZCO) doped with Y2O3. Interest in this class of materials is due to great prospects in the field of replacing the traditional type of nuclear fuel with uranium-free dispersed nuclear fuel, which is based on a technological solution using plutonium as a fissile element, placed in a dispersed inert matrix based on oxide or nitride ceramics. The purpose of this work is to study the effect of doping of ZCO ceramics with Y2O3 on the optical and heat-conducting properties. During the study, it was found that an increase in the concentration of the Y2O3 dopant leads to the formation of a highly ordered CeZrO4 phase, the presence of which leads to the appearance of an additional absorption band in the region of 550 – 650 nm, as well as a decrease in the transmission value in the region of 400 – 700 nm. To evaluate the results obtained, the methods of optical UV spectroscopy and heat flux determination were applied. It has been found that doping with Y2O3 leads to the formation of a highly ordered CeZrO4 phase, the formation of which leads to the appearance of additional spectral absorption lines, as well as a shift in the band gap to the region of low energies. During analysis of the thermophysical parameters, it was found that a change in the phase composition leads to an increase in the thermal conductivity coefficient by more than 40 – 60 %.

Study of the thermophysical properties of heat-resistant intermetallic titanium γ-alloy obtained using methods of shaped casting and additive technologies

Nowadays, the transition from shaped casting to the methods of selective laser sintering and selective electron beam sintering (SELS) has been implemented for a number of materials. The thermophysical properties of materials play a decisive role when designing and modeling heat and mass transfer processes during powder sintering by additive technologies and monitoring the stability of the operational properties of final products. We present the results of studying the thermophysical properties of the samples of heat-resistant intermetallic titanium γ-alloy obtained by shaped casting and SELS in the range of 200 – 900°C. The characteristic DSC curves of the images and experimental temperature dependences of the heat capacity and thermal conductivity are presented. Comparative analysis of sample density measurements was carried out before and after thermal exposure. Analysis of the results obtained revealed a similar nature of the temperature dependences of the specific heat capacity and thermal conductivity of the samples produced by the methods of shaped casting and SELS. The presence of thermal stresses was observed when measuring the thermal expansion coefficient in the samples obtained by shaped casting. However, leveling of the stress state by additional thermal exposure led to identical values of the thermal expansion coefficient for the samples obtained by both methods. The results obtained can be used to improve the methodology for modeling heat and mass transfer processes during sintering of metal-powder compositions.

Insights into the thermophysical properties and heat conduction enhancement of NaCl-Al2O3 composite phase change material by molecular dynamics simulation

In concentrated solar power (CSP) applications, the thermal energy storage (TES) system with molten salt is widely utilized. However, molten salts usually suffer from relatively low thermal conductivity. In this regard, adding nanoparticles has been considered as an effective way to improve the thermal conduction of molten salt. In the present work, the thermophysical properties of NaCl-Al2O3 composite phase change material (PCM), including the melting point, specific heat capacity, melting enthalpy, self-diffusion coefficient as well as thermal conductivity, are first examined by using molecular dynamics simulations. Simulation results show that the thermal conductivity of base salt NaCl can be significantly improved by adding Al2O3 nanoparticles. An enhancement of 17.94% has been observed with 5.565 wt% addition of Al2O3 nanoparticles. The results also suggest the doped nanoparticles can reduce the melting point and melting enthalpy but increase the specific heat capacity of base salt. The increase in self-diffusion coefficient of composite PCM with temperature indicates the existence of micro-convection around nanoparticles in base salt. Furthermore, the microscopic mechanism of thermal performance enhancement by adding nanoparticles into molten salt has been revealed. The results indicate that the interfacial thermal resistance is greatly related to the type of base salt and nanoparticles. Based on energy analysis, it is concluded that the variation of ion collision frequency in base salt due to the addition of nanoparticles plays a major role in the enhancement of thermal conductivity of NaCl-Al2O3 composite phase change material.

Simulation of an energy-efficient cool roof with cellulose-based daytime radiative cooling material

Conventional air conditioners are considered the most energy-intensive components in residential and tertiary buildings. Besides high energy consumption, they are also harmful to the environment due to the emissions of hydrofluorocarbons into the atmosphere. Night sky cooling or radiative cooling is a naturally occurring phenomenon that takes advantage of the atmospheric transparency window in the wavelength range of 8–13 µm to effectively dissipate heat from a surface into outer space. However, this can only occur at night, which is incompatible with the cooling demand that peaks during the day. This paper aims to develop a cool roof that relies on a daytime radiative cooling (DRC) material with low solar absorptivity in the wavelength range of 0.3–2.5 µm and high emissivity in the atmospheric window. The used DRC material is derived from cellulose acetate-based films, which are recyclable, sustainable, and bioclimatic. This material is used to improve the energy efficiency of an existing building by reducing the temperature of the roof to improve the thermal comfort of the building in the framework of Moroccan climatic zones. Software simulations are used to assess the needs and the demand of the building and simulate the impact of the smart device on the building's thermal performance and evaluate the thermophysical and optical properties of the DRC material. This latter material will be compared with another DRC material based on titanium dioxide and silicon dioxide mixture coating in terms of cooling performances. Results have shown a drastic sub ambient cooling of more than 3 °C and a great reduction in the indoor temperature of the building and a reduction in the total electricity consumption of up to 60.38 %.

Experimental measurement of thermophysical properties of some commercial phase change materials (PCM) for air conditioning applications

This paper presents the measurement of liquid phase density, thermal diffusivity, thermal conductivity, and dynamic viscosity of five commercial PCM (RT2HC, RT5HC, OM05-P, OM08, CrodaTherm9.5) in the temperature range 2 − 30 °C. The density of RT2HC, RT5HC, OM05-P is 23-24% lower than water, that of OM08 is 6% higher than water and that of CrodaTherm9.5 is 14% lower than water. The thermal diffusivity of RT2HC, RT5HC, OM05-P is 22-24% lower than water, that of OM08 is around a half of water and that of CrodaTherm9.5 is 38-40% lower than water. The thermal conductivity of the five PCM is 72-74% lower than water. The dynamic viscosity of RT2HC, RT5HC, OM05-P and OM08 is 2 − 3 times higher than water, and that of CrodaTherm9.5 is from 7.4 to 8.3 times higher than water. The five PCM are expected to provide convective heat transfer performance significantly lower than water .

Numerical evaluation of thermal energy storage rate in planar and cylindrical phase change material composites

Efficient design of high-performance phase change material (PCM) composites remains challenging, due to a lack of understanding regarding the relationships between the performance characteristics, and relevant design parameters. In this work, we adopt the effective composite approximation, as justified through experimental validation, and numerically investigate the effects of individual design variables on the thermal energy storage rate into phase change material composites under a constant temperature boundary condition. We isolate and describe the impact of (1) geometry, (2) volume fraction of metal, (3) time, (4) material thermophysical properties, and (5) the magnitude of the thermal boundary condition on the heat absorption rate normalized by heated area, by volume, and by mass of the active composite PCM. Finally, we assess the accuracy of the quasi-steady state approximation, as well as a modified version of the quasi-steady state approximation, which incorporates a term for sensible heating. These results are used to illustrate key relationships and trends which affect the volume fraction of metal in a composite PCM which maximizes the thermal energy storage rate across different performance metrics.

Impacts of the Thermophysical properties of the phase change materials (PCMs) on the melting performance and optimum dimensions of fins

Choosing an appropriate phase change material (PCM) for specific application and ameliorating melting performance of PCMs with various thermophysical properties by optimizing fins are significant to achieve carbon peak and carbon neutralization. However, detailed influences of thermophysical properties on melting performances and optimum dimension of fins have not been deeply studied. Therefore, above issues are conducted numerically in this study. Results demonstrate that average melting rate increases by increasing all thermophysical properties except viscosity. Melting rate is additionally enhanced by 19.9% through optimizing the fins, their optimum dimensions decrease by increasing thermal conductivity, density, thermal expansion coefficient and latent heat of fusion. However, by increasing specific heat capacity and viscosity increases their optimum dimensions. Ranges of the optimum dimension (relative distance) of orthogonal fins (0.0592 to 0.1857) and maximum average melting rates (250.11 W to 839.36 W) are illustrated. Results effectively guide to choose appropriate PCMs and design optimum fins.

Monitoring of Sports Health Indicators Based on Wearable Nanobiosensors

Biosensors are instruments that are sensitive to biological substances and convert their concentration into electrical signals for detection. Generally speaking, there are two main means to promote health: one is medical intervention, and the other is exercise intervention. Medicine is mainly the second half of the health decay of the whole person, that is, disease treatment and control, while exercise intervention is mainly to prevent and promote the first half of the health decay. The purpose of this paper is to study the biochemical properties of nanomaterials and the exercise health of the elderly. In this paper, an electrochemical research method for detecting the kinase activity of polynucleotides by streptavidin-gold nanoparticles and enzyme amplification is proposed based on the thermophysical properties of materials and the properties of nanoparticles. The experimental results show that, compared with the traditional electrochemical method, the method has the advantages of simple operation, high sensitivity, and high selectivity, its linear range is from 0 U/mL to 5 U/mL, and the detection limit is 0.01 U/mL. In contrast, AgNWs cotton fiber films exhibited lower volume resistivity. The experimental design of this paper provides a theoretical and practical basis for researchers and has great research significance for the innovative research and development of nanomaterials.

Polyethylene glycol / nanofibrous Kevlar aerogel composite: Fabrication, confinement effect, thermal energy storage and insulation performance

In order to develop a new type of dual-functional composite with thermal storage and insulation properties, polyethylene glycol / nanofibrous Kevlar aerogel (PEG/KNA) was fabricated by combining the heat storage advantage of PEG and low thermal conductivity of KNA. The morphology, structure and thermo-physical performances, especially the thermal insulation property and effects of confinement on the phase transition behavior were investigated. The results demonstrate that PEG was trapped and fixed in the pores of KNA by physical interaction. The maximal fusion and solidification latent heat for the leak-free PEG 10K/KAN are 173.77 J·g−1 and 173.79 J·g−1, while they are 163.10 J·g−1 and 162.33 J·g−1 for PEG 6K/KNA, respectively. The actual values of all PEG/KNA are lower than the theoretical enthalpy, and the heat storage capacity reduce sharply with the decrease of PEG loading amount due to the formation of "non - melting layer" on the interface of KNA films. This portion of PEG in the non-melting layer is amorphous and does not contribute to heat storage. The crystallization rate of PEG/KNA is lower than that of pure PEG due to the confinement effects of KNA. In addition, PEG/KNA demonstrates good stability and excellent thermal insulation performance during cyclic usage. This study not only developed a feasible way for the design of thermal insulation composites, but also provided a deep insight for revelation of confinement effects on the thermophysical properties of composite phase change material.

Thermo-physical properties measurements of hygroscopic and reactive material (zeolite 13X) for open adsorptive heat storage operation

The determination of the thermo-physical properties (density, specific heat capacity, and thermal conductivity) of hygroscopic and reactive solid materials, as those applied in sorption thermochemical heat storage systems, is not trivial. Lack of precision in the measurement and contradictory results make it difficult to enter these thermal parameters in the programs used for simulating the functioning and operating scenarios of thermochemical heat storage devices. For this reason, different techniques have been applied and compared in order to improve the accuracy of the measurement. In particular, there was a difference in thermal conductivity (about 30%) between the hot disc experiments and the others, as well as a higher dispersion of the experimental data (MAD > 19%). The same was found for specific heat capacity (MAD ≈14%). Hence, the transient hot disk method is not suitable for estimating thermal conductivity and the specific heat capacity of this type of material. Nevertheless, this technique enables a good estimation of the thermal effusivity. The thermal conductivity and the specific heat capacity were investigated by the hot wire method and by TG-DSC, respectively. A slight increase in specific heat with temperature was observed, but in the range of 70–95 °C, this value is constant at 913 J kg−1 K−1. The applied methodology was validated by comparing the experimental and calculated thermal effusivity values.

Preconceptual Design of Multifunctional Gas-Cooled Cartridge Loop for the Versatile Test Reactor—Part I

An integrated effort by the Versatile Test Reactor (VTR) Gas-Cooled Fast Reactor (GFR) Team to develop an experiment vehicle or extended-length test assembly for the VTR experiments is led by the Idaho National Laboratory and supported by an industrial partner, General Atomics, and university partners, including Texas A&M University, University of Michigan, Oregon State University, University of Houston, and University of Idaho. The overall focus of the effort is to design a helium gas-cooled cartridge loop (GCL) to assist with the testing of fuels, materials, and instrumentation to further support development of advanced reactor systems. This study is divided into two parts. Part I provides the GCL functional requirements and critical irradiation data needs for advancing GFR technologies. Part II includes the measurement techniques developed to measure the thermophysical properties of the different materials in the GCL, as well as the functionality and efficacy of these instrumentation and control systems within the GCL. This paper, Part I, describes the overall preliminary conceptual design of the VTR helium cartridge loop, the design of a fission product venting system, the thermal-hydraulic effects of flow direction, and gamma-heating generation in the cartridge. This paper also describes a three-dimensional computational fluid dynamics study that was carried out to examine the effects of the helium flow direction in the GCL on its thermal-hydraulic characteristics, engineering feasibility, and in-VTR experiment design. Both steady-state operation and a transient scenario (pressurized loss of forced circulation) were analyzed for the upward and downward helium flow options in the test article section in the GCL to provide quantitative data for selection of the helium flow direction. Additional analyses and development, as well as integrated out-of-pile testing, are planned to demonstrate and verify the performance of the GCL prior to insertion into the VTR.

Preconceptual Design of Multifunctional Gas-Cooled Cartridge Loop for the Versatile Test Reactor: Instrumentation and Measurement—Part II

An integrated effort by the Versatile Test Reactor (VTR) Gas-Cooled Fast Reactor (GFR) Team to develop an experiment vehicle or extended-length test assembly for the VTR experiments is led by Idaho National Laboratory and supported by an industrial partner, General Atomics, and university partners, including Texas A&M University, University of Michigan, Oregon State University, University of Houston, and University of Idaho. The focus of the effort is to design a helium gas-cooled cartridge loop (GCL) to assist with the testing of fuels, materials, and instrumentation to further support development of advanced reactor systems. This study is divided into two parts. Part I provides the functional requirements and critical irradiation data needs for advancing gas-cooled fast reactor (GFR) technologies. The objective of Part I is to describe the overall preliminary conceptual design of the VTR helium cartridge loop, the design of a fission product venting system, thermal-hydraulic effects of flow direction, and gamma-heating generation in the cartridge. This paper, Part II, includes the measurement techniques being developed to measure the thermophysical properties of the different materials that make up the GCL, as well as the instrumentation and control system within the cartridge required for advancing GFR technologies. The purpose of Part II is to describe the functionality and efficacy of the measuring systems being developed to support the GCL. These systems include (a) a unique measurement platform that joins ion irradiation and a laser beam with an infrared camera and X-ray detection equipment developed and used to investigate more accurately and efficiently the influence of radiation and fission gases on the material properties under high temperatures; (b) a laser-induced breakdown spectroscopy to demonstrate its capability of monitoring possible fuel failure by detecting sub–part-per-million levels of xenon in the helium coolant stream, providing experimental data to better understand the interactions of fuel elements and coolant at high temperature, pressure, and fast neutron flux; (c) fiber-optic sensors with the ability to measure both the temperature demonstrated using a three-dimensional printed heat exchanger and, potentially, the strain in harsh environments; and (d) surface emissivity measurement test rigs to understand the effect of temperature, radiation, and surface finish on the silicon carbide cladding surface emissivity. Additional analyses and development, as well as integrated out-of-pile testing, are planned to demonstrate and validate the accuracy of the measuring systems and instrumentation in a more prototypic environment prior to their implementation into the VTR.

WOLLASTONITE CERAMICS FROM CHALK AND DIATOMITE FOR REFRACTORY INSULATION

Wollastonite ceramics was obtained from chalk and diatomite by the method of solid-phase synthesis of components. The influence of charge composition, modes of its mechanochemical activation and temperature-time modes of heat treatment on the phase composition, physical-mechanical and thermophysical properties of ceramic materials is studied. As a result of the joint mechanochemical activation of the charge components (chalk + diatomite), the temperature of the solid-phase synthesis of wollastonite ceramics was reduced to 900 °C. After firing for 2 hours, ceramic samples were obtained almost 90 % consisting of the mineral wollastonite. The compressive strength of the samples is 22 – 23 MPa at an average density of 1270 – 1300 kg/m3. The material has a stable thermal coefficient of linear expansion (TCLE) under 7.76?10–6 K–1. It can be operated at temperatures up to 1100 °C inclusively. Thermal insulation samples with an average density of 435 kg/m3, compressive strength of 2.2 MPa, thermal conductivity of 0.099 W/(m °C) and the limiting operating temperature under 1050 °C were obtained from the prepared charge mixture and foamed perlite. The resulting materials can be used as thermal insulation for industrial and civil facilities, refractory insulation of industrial furnaces, equipment, etc.