Rapid Temperature Rise Research Articles

The Thermodynamics and Kinetics of a Nitrogen Reaction in an Electric Arc Furnace Smelting Process

The nitrogen content of electric arc furnace (EAF) steel is much higher than that of basic oxygen furnace (BOF) steel, which cannot meet the requirements of high-grade steel. Most denitrification processes only considered a single smelting condition, which leads to poor denitrification effect. In this study, a hot state experiment was conducted to simulate the melting process of EAF steelmaking and to explore the thermodynamic and kinetic constraints of the molten steel nitrogen reaction in the scrap melting, oxygen blowing decarburization, and rapid temperature rise stages. The experimental results showed that the nitrogen reaction in the molten pool during the scrap melting stage was a first-order nitrogen absorption reaction, and the reaction-limiting link was the diffusion of nitrogen atoms in the molten steel. When the carbon content increases to 4.5%, the bath temperature decreases to 1550 °C, and the nitrogen partial pressure decreases to 0.2 PΘ, the nitrogen saturation solubility decreased to 0.0198%, 0.0318%, and 0.0178%, respectively. At the same time, the rate constants decreased to 0.132 m/min, 0.127 m/min, and 0.141 m/min, respectively. The nitrogen reaction in the oxygen blowing decarburization stage was a secondary denitrification reaction, and the reaction-limiting link was the gas-liquid interface chemical reaction. Argon had better degassing effect. When the argon flow rate increased from 100 mL/min to 300 mL/min, the reaction constant increased by about four times. When the oxygen content of molten steel was 0.0260%, the denitrification rate constant decreased by about 2.5 times. The nitrogen content of liquid steel was higher than 0.045%, and the reaction was a secondary reaction. As the nitrogen content decreased, the reaction rate decreased, and the reaction-limiting link changed from the gas-liquid interface chemical reaction to the joint control of mass transfer and chemical reaction. The oxygen content in the molten steel can not only hinder the chemical reaction of nitrogen at the gas-liquid interface, but also reduce the mass transfer rate of nitrogen atoms in the molten steel. The results provided a theoretical basis for the optimization of nitrogen removal process and further reduction of nitrogen content in liquid steel.

Alpine Shrubification: Juniper Encroachment into Tundra in the Ural Mountains

Snow cover is one of the most important factors affecting the regeneration and growth of shrubs in cold arctic and alpine ecosystems. In many of these cold regions, climate change in the last century is manifested not only in a rapid rise of temperature, but also in an increase in winter precipitation. For instance, in the Ural Mountains, winter turned warmer and more humid during the past century, leading to higher snow accumulation. We investigated how the change trends in the cold season (November to March) climate conditions affected the recruitment of the shrub Juniperus sibirica Burgsd., the most widespread shrub conifer in mountains of this region where it is dominant in treeless areas. Specifically, we considered seven sites located in the Southern and Northern Urals that are subjected to lower and higher continentality, respectively. We assessed how juniper recruitment changed along altitudinal gradients going from the open forest to the alpine tundra and passing by the transition zone. We found that juniper shrubs recruited at higher elevations during the 20th century in most sites, with a rapid shrub encroachment into alpine tundra (shrubification) after the 1990s. This process was especially intensive in the last decades at the uppermost parts of convex slopes where the snowpack is shallow. We found positive associations between juniper recruitment and cold-season precipitation or temperature in the Northern and Southern Urals, respectively. Shrubification is following upward treeline shifts in the Southern Urals. Our findings indicate that juniper shrubs will tend to colonize sites with low snowpack depth if winter conditions keep warm and wet enough and the snowpack allows the effective protection of shrubs.

Flow and heat transfer performance of array finned channel coupled jet heat sink

The rapid rise in temperature of perovskite tandem solar cells under a high concentration ratio has introduced a huge decline in the efficiency of photoelectric conversion. To solve this problem, an array finned channel coupled jet heat sink has been designed. The ratio of height to diameter of the jet (H/d) on heat transfer, channel aspect ratio, pumping power, and other factors on heat transfer and flow characteristics are examined by the computational fluid dynamics and experimental methods. The results suggest that the trough micro-jet heat sink demonstrates better performance than the smooth cooled surface heat sink. The smaller the H/d, the better the heat transfer performance, and the larger the jet Reynolds number, the better the heat exchange effect. The key influence factor of pressure loss is the heat sink structure. With the increasing pumping power, the overall thermal resistance decreases, and the trend tends to be flatter when the pumping power exceeds 0.15 W. For constant Rea, the larger the input heat flux Q, the larger the energy efficiency ratio and the higher the utilization rate of energy.

Experimental Study on Bubble Effect of Oil–Paper Insulation in Natural Ester

The rapid temperature rise brought by short-term overload may cause the oil–paper insulation of transformer to produce bubbles. The existence of bubbles will reduce the electrical strength of transformer insulation and may lead to partial discharge or even breakdown of the oil–paper insulation in the transformer. In this article, the bubble effect of oil–paper insulation in natural ester is studied experimentally. A bubble effect test platform is designed and built according to the temperature conditions of the transformer in operation, and bubbling tests are carried out for natural ester-cellulose insulation. Initial temperature of bubble escape (ITBE) is obtained for different winding insulation paper layers, temperature rise rate, and pressboard aging time, respectively. The experimental results show that the bubbles aggregate in the gap between the paper layers before bubbles escape into oil, and ITBE is affected by winding insulation paper layers. Besides, a higher temperature rise rate corresponds to a lower ITBE. With the thermal aging of pressboard, ITBE increases, because the number and diameter of pores decrease in fibers of pressboard.

Numerical Analysis of a TEG and mPCM Enhancement System for BIPVs Using CFD

Building-integrated photovoltaics (BIPVs) are the most promising systems for net-zero energy buildings. However, there are few practical cases because of shortcomings, such as the lack of solar tracking and the rapid rise in PV surface temperature. Therefore, methods of increasing the efficiency of BIPVs have been proposed and studied. These include using phase change material (PCM) or heat fins, wavelength selection, decreasing the PV surface temperature, or using a thermoelectric generator (TEG) and convection cooling to utilize the waste heat from the PV. Many preceding studies have been conducted on TEG and convection heat dissipation methods to utilize as much waste heat as possible. Therefore, in this study, a TEG–PCM hybrid system using mPCM was proposed to improve constructability. Herein, the appropriate phase change temperature of the PCM, the heat fin spacing in the PCM container, and the TEG arrangement were analyzed through computational fluid dynamics (CFD)-based simulations. The appropriate melting temperature of the PCM, the heat fin interval, and the arrangement of the TEG for the proposed system are 25 °C, 20 mm, and 140 mm, respectively. In order to achieve optimal efficiency, it is necessary to consider an appropriate amount of heat transfer, and it has been confirmed that if there are too many thermoelectric elements, the opposite effect occurs.

Research on Factors and Influencing Correlation of Coal Core Temperature during Coring.

The core-tube method is a common method to measure the coal seam gas content (CSGC). However, cutting heat and friction heat will be generated in the core-tube coring process, which will increase the coal core temperature and the coal core gas loss, thus resulting in a large error in the determination of the gas content. The accuracy of the gas content determination is closely related to the temperature variation of coal core during core-taking. Based on this, the team developed the "thermal effect simulation device of coal core in the core-taking process" and carried out the temperature change test experiment of the coal core in the core-taking process under different conditions. The results show that the temperature variation of the coal core during the core-taking process shows four stages: constant temperature, rapid temperature rise, slow temperature rise, and temperature drop. The temperature rise rate, temperature rise duration, and temperature rise peak of the coal core increase with the increase in rotate speed, coal strength, friction area, and frictional load. In the axial direction, the closer to the upper end of the core pipe, the higher the core temperature. In the radial direction, the closer the core is to the wall of the core pipe, the higher the core temperature is. Under the influence of cutting heat and friction heat in the process of core-taking, the maximum heating rate of the core-taking tube wall within 8 min is 20 °C/min, the peak temperature is 158.4 °C, the average temperature of the wall is above 100 °C, and the average temperature rise of the coal core reaches 55.7 °C. Within 60 min, the average temperature of the coal core remained above 50 °C. The order of influence of coal core temperature from large to small is as follows: rotate speed, frictional load, friction area, and coal strength. It can provide a reference for accurately determining CSGC using the core-tube method or designing a coring device to eliminate or reduce the thermal effect during coring.

The impact of castration on physiological responses to exertional heat stroke in mice.

The capability of male mice to exercise in hot environments without succumbing to exertional heat stroke (EHS) is markedly blunted compared to females. Epidemiological evidence in humans and other mammals also suggests some degree of greater vulnerability to heat stroke in males compared to females. The origins of these differences are unknown, but testosterone has previously been shown to induce faster elevations in core temperature during acute, passive heat exposure. In this study, we tested the hypothesis that loss of testosterone and related sex hormones through castration would improve the performance and heat tolerance of male mice during EHS exposure. Twenty-four male mice were randomly divided into 3 groups, untreated EHS mice (SHAM-EHS), castrated EHS mice (CAS+EHS) and naïve exercise controls (NAIVE). Exercise performance and physiological responses in the heat were monitored during EHS and early recovery. Two weeks later, blood and tissues were collected and analyzed for biomarkers of cardiac damage and testosterone. Core temperature in CAS+EHS rose faster to 39.5°C in the early stages of the EHS trial (P<0.0001). However, both EHS groups ran similar distances, exhibited similar peak core temperatures and achieved similar exercise times in the heat, prior to symptom limitation (unconsciousness). CAS+EHS mice had ~10.5% lower body mass at the time of EHS, but this provided no apparent advantage in performance. There was no evidence of myocardial damage in any group, and testosterone levels were undetectable in CAS+EHS after gonadectomy. The results of these experiments exclude the hypothesis that reduced performance of male mice during EHS trials is due to the effects of male sex hormones or intact gonads. However, the results are consistent with a role of male sex hormones or intact gonads in suppressing the early and rapid rise in core temperature during the early stages of exercise in the heat.

High-Precision and Low-Damage Microchannel Construction via Magnetically Assisted Laser-Induced Plasma Ablation for Micro-Thermoelectric Devices.

Thermoelectric devices are developing toward high density and miniaturization with a large filling factor for new applications in chip thermal management and microenergy harvesting. Pulsed laser etching has become one of the most effective tools for the patterning construction of highly integrated micro-thermoelectric devices. However, the laser spot size and Gaussian laser energy distribution restrict the processing size and accuracy of microchannels. Moreover, the rapid temperature rise caused by laser energy injection would also raise serious problems such as element volatilization, cracks, and recast layers. Herein, a liquid-assisted nanosecond laser ablation technology with magnetically controlled plasma is proposed to etch microchannels on thermoelectric thick films. By evaluating the size and shape of microchannels, we theoretically investigated the influence of cavitation bubbles on the laser optical path and surface roughness in laser-induced plasma ablation. In addition, the energy criterion for high-precision ablation is revealed, and the effect of magnetic field on ablation threshold is explained by magnetic constraint on energy and kinetic properties of the laser-induced charged plasma plume. Finally, the high-precision and low-damage microchannels are achieved on Bi2Te3 thermoelectric thick films with a minimum line width of 19.12 μm and a small sidewall inclination degree of tan θ = 0.085. This work provides a promising alternative for the fabrication of high-density three-dimensional (3D) patterning in semiconductor microdevices.

Influence of the orbital configuration of a four-rail electromagnetic launcher on Joule heat

During the working process of electromagnetic launcher, the rapid temperature rise caused by heat accumulation has an important influence on the performance and life of the armature and rail. In order to better solve the thermal ablation problem of the armature and rail of the four-rail electromagnetic launcher, three different configurations of the rail and armature model are established, using the finite element method, the Joule heating characteristics of the three structures are simulated, analyzed and compared. The simulation results show that the Joule heat of the armatures of the three structures is concentrated at the throat, and the Joule heat of the rail is concentrated at the edge of the rail and the contact surface of the pivot rail; among the three structures, the electromagnetic launcher of the convex rail-concave armature structure has the smallest temperature rise rate, in addition, the peak temperature on the contact surface between the armature and the guide rail is the lowest, the safety of the ammunition is the highest, and the performance is more advantageous than the electromagnetic launcher of the other two structures.

Prediction Model of Bubble Formation in Oil-Paper Insulation Based on the ITBE Envelope

Due to rapid temperature rise and insulation moisture, bubbles can generate in the oil-paper insulation of oil-immersed power transformers, which can reduce the dielectric strength of oil-paper insulation and even bring about the risk of insulation breakdown. In order to accurately evaluate the conditions of bubble formation, the physical process of bubble formation in oil-paper insulation is studied in this article. Considering the effects of water vaporization, gas dissolution in oil, and moisture migration on bubble formation, a bubble formation prediction model is constructed. Based on Henry’s law, the dissolution equilibrium of gas in oil is taken into consideration and the upper boundary of the initial temperature of bubble effect (ITBE) envelope is obtained in this model. Based on the moisture equilibrium in oil-paper insulation, the bubble formation process caused by the emergence and rapid evaporation of free water is analyzed, and then, the lower boundary of the ITBE envelope is obtained in this model. The model results show that the moisture content of the pressboard and the presence of free water have a great impact on ITBE. Specifically, the higher the moisture content, the lower the ITBE value. In addition, with the further increase of moisture content, the upper and lower boundaries of the ITBE envelope gradually tend to be the same. However, once free water is present on the surface of cellulose, ITBE decreases rapidly to below 120 °C. The model built in this article is of great significance to study the temperature limit of the power transformer. Hence the ITBE envelope can provide an important theoretical reference for reducing the risk of bubble formation during power transformer operation.

Heat transfer analysis of a pulse-heated microwire in CO2 at supercritical pressures

This paper analyzes the characteristics of convective heat transfer of a pulse-heated platinum microwire cooling in CO2 under supercritical pressures based on experimental data. The microwire undergoes a rapid temperature rise of around 664 K within 0.35 ms. An inverse problem is formulated and numerically solved to extract heat transfer data from experimental measurements. In addition, a predictive model for the convective heat transfer coefficient is developed to fully close the equation set. Results are interpreted based on the bulk pressure from 7.38 to 9 MPa and bulk temperature from 295 to 325 K. The convective heat flux of CO2 generally decreases with time, and in the medium-term, the reduction is slightly decelerated owing to buoyancy-driven flows. This demonstrates that high-pressure and low-temperature bulk states generally exert larger convective heat flux to cool the microwire. During the early 10 ms, the time-averaged convective heat flux is of the order of 1 MW/m2, resulting in rapid cooling. This value shows a weak critical enhancement upon crossing the Widom line. During the remaining time, the time-averaged convective heat flux drops to the order of 0.1 MW/m2. Such a drop in heat flux is more obvious in low-bulk-density cases, leading to a relatively long time for sufficient W cooling.

Mechanism of flashback in horizontal smoldering of polyurethane foam: A numerical study

Smoldering of polyurethane foam continues to attract the attention of the fire community because of its potential of causing severe fire hazards. Our previous work observed a unique flashback phenomenon denoting the reversal spread of horizontal smoldering front. This work further develops a one-dimensional model of foam smoldering via Gpyro to examine the flashback mechanism. The model adopts a 6-step reaction scheme consisting of two pyrolysis and four oxidation reactions based on thermogravimetric analysis. Comparison with the experimental results indicates that the computational model successfully reproduces the flashback phenomenon and explains the flashback mechanism. From the view of chemical kinetics, the initial pyrolysis of foam is followed by the oxidation of β-foam during the 1st stage with a lower peak temperature and limited oxygen supply, and the flashback in the 2nd stage is mainly dominated by char oxidation, which results in more heat releases and a higher peak temperature. The rapid temperature rise at the end of the 2nd stage, causing the maximum temperature in the whole smoldering process, is attributable to the oxidation of α-char (secondary char oxidation).

Surface amorphization and nanocrystallization of the gradient-structured copper by explosive impact treatment

In this study, surface treatment on pure copper plates is carried out by an explosive impact technique. The gradient structures were successfully produced along the depth of plates near the impacted surface. It is found that both amorphous state and nano-grains with an approximate size of 10 nm are generated at the topmost surface after explosive impact treatment. The corresponding microhardness at the topmost surface is 4.35 times that of the annealed sample. Moreover, it is found that the microhardness decreases along depth of the specimen gradually. The calculation results demonstrate that amorphization and nanocrystallization on the topmost surface are closely related to the rapid temperature rise and cooling rate. This work provides experimental evidence that the explosive impact treatment is a potential technology of surface treatment to produce a surface amorphous state.

Highly efficient soldering of Sn-Ag-Cu solder joints using blue laser

Laser soldering has been widely used to connect electronic components to printed circuit boards (PCBs), owing to its significant advantages, including localized heating, noncontact heating, rapid temperature rise and fall, good controllability, and high adaptability. However, poor absorptivity of the metals involved is one of the main drawbacks of traditional infrared (IR) laser soldering. In this study, we constructed a novel blue diode laser soldering system to validate its higher heat efficiency compared to that of an IR diode laser. A comparative study of blue and IR lasers for Sn-Ag-Cu solder/PCB joints performed by varying the laser process parameters revealed that the blue laser enabled joint formation at a lower laser output power and irradiation time. Furthermore, miniature impact tests of the joints fabricated using the blue laser at 8 W and those fabricated using the IR laser at 14 W revealed comparable joint impact strengths. The comparability of the 8-W blue and 14-W IR laser processes was confirmed by microstructure observations. These experimental results proved that blue laser soldering exhibited 43 % higher efficiency than IR laser soldering. This increased efficiency was further successfully validated by measuring the light absorption rate on the solder and performing simple thermal calculations based on this measurement. These results clearly show that blue laser soldering can be used as a highly energy-efficient electronic packaging technology.

Temperature Gradient Analyses of a Tubular Solid Oxide Fuel Cell Fueled by Methanol

Thermal management in solid oxide fuel cells (SOFC) is a critical issue due to non-uniform electrochemical reactions and convective flows within the cells. Therefore, a 2D mathematical model is established herein to investigate the thermal responses of a tubular methanol-fueled SOFC. Results show that unlike the low-temperature condition of 873 K, where the peak temperature gradient occurs at the cell center, it appears near the fuel inlet at 1073 K because of the rapid temperature rise induced by the elevated current density. Despite the large heat convection capacity, excessive air could not effectively eliminate the harmful temperature gradient caused by the large current density. Thus, optimal control of the current density by properly selecting the operating potential could generate a local thermal neutral state. Interestingly, the maximum axial temperature gradient could be reduced by about 18% at 973 K and 20% at 1073 K when the air with a 5 K higher temperature is supplied. Additionally, despite the higher electrochemical performance observed, the cell with a counter-flow arrangement featured by a larger hot area and higher maximum temperature gradients is not preferable for a ceramic SOFC system considering thermal durability. Overall, this study could provide insightful thermal information for the operating condition selection, structure design, and stability assessment of realistic SOFCs combined with their internal reforming process.

Optimal Temperature Rise Control for a Large-Scale Vertical Quench Furnace System

An optimal switching heating control strategy based on minimum margin (OS-MM) is proposed for high efficiency, low energy consumption, and high-uniformity fine control in a large-scale vertical quench furnace. This work was stimulated by the need for solving the contradiction between the heating rate and temperature overshoot to achieve a rapid rise in temperature with no overshoot. Based on a three-dimensional (3-D) transient temperature field model of the quenching furnace, the temperature field optimization control problem is transformed into a boundary optimization control problem of rapid heating, whereby it is rigorously proved that the fastest rise in temperature is attained by the full-power heating, which satisfies the bang-bang characteristics. The key parameter that determines the overshoot in the full-power heating mode is introduced and defined as the minimum margin in the temperature-rising process. The analytical expression for solving the minimum margin is calculated by the eigenfunction expansion method and using the strong metal thermal inertia of the internal temperature field, the OS-MM method is designed to stop the heating in advance at a calculated switching point to optimize full-power heating, thus conserving energy by reducing its consumption. The results of simulation and industrial experiments show that this strategy greatly shortens the temperature adjusting time, significantly reduces energy consumption, and effectively improves the control performance indices, such as overshoot and static error in the temperature holding period of the thermal treatment process, as compared to the existing heating methods.

Wettability enhancement of high-speed steel surface with electrostatic flocking method

Due to the important role of cutting fluid in lubrication of tools, achieving its better wetting effect on the surface has become a research hotspot. Castor oil is widely used in machining with excellent lubrication, but its poor wettability cannot be ignored. To enhance the wettability of castor oil on the tool surface, grooves were prepared on the surface of high-speed steel (HSS) by laser, then nylon fibers were vertically implanted into the grooves by electrostatic flocking. The optimization experiments of groove sizes, electrostatic voltage and fiber length were performed, then flocking surfaces with enhanced wettability were evaluated through the self-propulsion, and high-temperature wetting tests. The results show that the penetration length of oil in the flocking grooves (5.71 mm) is 2.28 times that of the non-flocking grooves (1.74 mm). Moreover, the dense fibers increase the heat exchange area at a high temperature, resulting in a rapid rise in temperature of droplet. Thereby the viscosity resistance of the oil is reduced, accelerating the penetration of oil droplets, which are completely wetting for only 0.3 s at 80 °C. This study is of reference value and practical significance for the application of flocking surfaces enhancing the wettability of cutting fluid.

Portable Heating System Based on a Liquid Metal Bath for Rapid PCR

With the outbreak of COVID-19 around the world, rapid and accurate detection of new coronaviruses is the key to stop the transmission of the disease and prevent and control the novel coronavirus, among which polymerase chain reaction (PCR) is the mainstream nucleic acid detection method. A temperature cycling device is the core of the PCR amplification micro-device. The precision of the temperature control and temperature change rate directly affect the efficiency of PCR amplification. This study proposes a new PCR method based on rapid PCR chip optimization of a liquid metal bath, which realizes precise and rapid temperature rise and fall control. We systematically explored the feasibility of using liquid metals with different melting points in the system and proposed a 47 °C bismuth-based liquid metal bath as the heat conduction medium of the system to optimize the system. The heat conduction properties of the thermally conductive silicone oil bath were compared. Compared with the thermally conductive silicone oil bath, thermal cycle efficiency is improved nearly 3 times. The average heating rate of the liquid metal bath is fast, and the temperature control stability is good, which can significantly reduce the hysteresis, and the temperature change curve is more gentle, which can greatly improve the efficiency of PCR amplification. The results of gene amplification using rat DNA as the template and SEC61A as the target also indicate that the system can be successfully used in PCR devices, and the types of PCR containers can be not limited to PCR tubes. Based on the experiment, we proved that the PCR method optimized by the liquid metal bath multi-gene rapid PCR chip can further improve the temperature response speed. It has the advantages of accurate data, fast response speed, low price, safety, and environmental protection and can effectively reduce the time of PCR and improve the application efficiency. As far as we know, this is the first international report on using a liquid metal bath to do rapid-cooling PCR.

Direct ink writing of dense alumina ceramics prepared by rapid sintering

Direct ink writing, as one kind of 3D printing technology, can produce alumina ceramics with complex shapes that are difficult to be obtained by conventional technology. However, how to quickly and efficiently produce dense and high-strength alumina ceramics by directing ink writing remains a challenge. In this work, a simple formulation of alumina inks containing trace amounts of organic additives (including 0.54 wt% dispersants and 0.9 wt% binders) was applied to prepare dense ceramics with various complex structures. The dispersants activate alumina particles through electrostatic repulsion and spatial site resistance effects, which can help alumina inks with a high mass fraction show the excellent printability. In addition, sintering aids significantly promote densification of alumina ceramics and reduce sintering temperature by introducing lattice defects and forming liquid phases. Due to the trace organics in the green bodies and low sintering temperature, a rapid temperature rise and organic burnout can be adopted to shorten debinding and sintering time and improve productivity. This work provides a new additive manufacturing idea for simple and efficient preparation of dense alumina ceramics with high mechanical properties and complex structures.

Low-temperature nanoscale heat transport in a gadolinium iron garnet heterostructure probed by ultrafast x-ray diffraction.

Time-resolved x-ray diffraction has been used to measure the low-temperature thermal transport properties of a Pt/Gd3Fe5O12//Gd3Ga5O12 metal/oxide heterostructure relevant to applications in spin caloritronics. A pulsed femtosecond optical signal produces a rapid temperature rise in the Pt layer, followed by heat transport into the Gd3Fe5O12 (GdIG) thin film and the Gd3Ga5O12 (GGG) substrate. The time dependence of x-ray diffraction from the GdIG layer was tracked using an accelerator-based femtosecond x-ray source. The ultrafast diffraction measurements probed the intensity of the GdIG (1 −1 2) x-ray reflection in a grazing-incidence x-ray diffraction geometry. The comparison of the variation of the diffracted x-ray intensity with a model including heat transport and the temperature dependence of the GdIG lattice parameter allows the thermal conductance of the Pt/GdIG and GdIG//GGG interfaces to be determined. Complementary synchrotron x-ray diffraction studies of the low-temperature thermal expansion properties of the GdIG layer provide a precise calibration of the temperature dependence of the GdIG lattice parameter. The interfacial thermal conductance of the Pt/GdIG and GdIG//GGG interfaces determined from the time-resolved diffraction study is of the same order of magnitude as previous reports for metal/oxide and epitaxial dielectric interfaces. The thermal parameters of the Pt/GdIG//GGG heterostructure will aid in the design and implementation of thermal transport devices and nanostructures.