Uniform Powder Research Articles

Experimental investigation for cutting performance of cemented carbide cutting insert developed through microwave sintering

In this paper cemented carbide cutting insert with the variation of cobalt alloy has been developed through sintering via microwave radiation processing technique. The Compact samples of uniform mixed WC-2Co and WC-4Co alloy powder has been placed in a microwave sintering furnace cavity and heated at an equal heating rate i.e. 40°C/min upto 1450°C. The sintered sample has been characterized for properties like densities, Vickers hardness, and fracture toughness. The relative densities of the sample are found to be 90–95% of the theoretical density. The highest Vickers hardness and toughness are found to be 1830 HV and 12.28 MPa. (m)-1/2 for WC-2Co and WC-4Co samples. The hardness and toughness properties are found to increase with an increase in the temperature. With an increase in the percentage of binder, i.e. Co in the alloys the toughness characteristic of sintered sample is found to increase whereas hardness decreases. The sintered specimen has been modified for cutting edges accordingly to act as a cutting insert. The machining of duplex stainless steel has been performed by using sintered samples. The machining performance for the prepared tool has been compared with the standard tool. The maximum cutting force required during the machining is approximately 650 N and it is 10–12% higher than the standard tool. Surface roughness during the machining has been found to be 2.83 μm during the machining. Thus, a comparable cutting insert with high-quality mechanical properties has been developed using microwave sintering.

Preparation of an MHC Alloy by Direct Doping of HfC and Its High Temperature Oxidation and Volatilization Behavior.

An HfC-doped molybdenum (Mo-Hf-C; MHC) alloy was prepared via a powder metallurgy process, including dry direct doping followed by ball-milling, cold-isotactic-pressing, and vacuum sintering. An oxidation comparison experiment was conducted, and the oxidation and volatilization behaviors were analyzed using the mass change, volatile generation rate, and morphology transformation. The results show that relatively uniform powder morphology can be obtained by the direct doping of carbide and high-energy ball milling. The oxidation of the MHC alloy at a lower temperature was characterized by the oxygen-absorption and a slight weight gain, while at a higher temperature and longer holding time, it was characterized by the mass volatile weight loss. A significant weight change appeared at 800 °C for 30 min with a weight loss rate of 4.8%. Surface oxidation products developed horizontally from ridged oxides at lower temperature stages to a flaky oxide layer at higher temperatures. The peeling of the oxide layer was the result of interfacial pore development, which led to exposure of the alloy matrix and further oxidation. Based on the oxidation and volatilization characteristics of HfC-doped MHC alloys, we conclude that the oxidation and volatilization of the MHC alloy conformed to the general law; however, the significant weight loss temperature, weight loss rate, volatilization temperature, and volatilization rate were improved compared with pure molybdenum and traditional molybdenum alloys, thus, indicating that the precipitation of the second phase HfC particles at the grain boundaries and within the grains can inhibit the oxidation and volatilization of matrix elements to a certain extent.

Characterisation of Spheroidised tungsten carbide metco 32c powder using radio frequency plasma

Metco 32C is a coarse grey powder, which mostly consists of tungsten carbide and cobalt; with small traces of nickel, chromium, boron, iron silicon and carbon. Metco 32C powder has the role of supporting oxidation and corrosion resistance at high temperatures as well as increasing the hardness of the coated materials. The spheroidal morphology of Metco 32C improves flowability during layer application methods such thermal spraying. There has been a growing interest in the development / improvement of methods producing powders of cast tungsten carbide and other high-melting-point materials of uniform composition, characterised by a high sphericity of the particles and having higher physical-mechanical properties. Spherical particles are generally preferred in the additive manufacturing process as they pack together for uniform powder bed density, better flowability in machinery, eliminate internal cavities and fractures resulting in a better quality of final product. Similarly, thermal spraying processes also require dense, spherical particles to ensure consistency and reproducibility of the feeding mechanism as well as interaction between the feedstock and thermal spraying heat source. The process of transforming irregularly shaped powder particles into spherical shapes is known as the spheroidisation process and this can be achieved by plasma spheroidisation. It was found that the spheroidisation ratio of the powder increased as the plasma plate power increased. A decrease in density was observed as plasma power increased. The spheroidised powders have a smaller particle size distribution (PSD) than the feed powders (un-spheroidised). The XRD results showed that as the plasma plate power increased the WC phase composition decreased, subsequently the phase composition of W2C increased.

Study on metal/ceramics composite particle by the dry impact blending method for metal additive manufacturing

Metal matrix composites (MMCs) show a unique improvement in metal materials properties such as high specific strength enabling their use in various applications. Additive manufacturing (AM) allows production of complex or customized parts directly from the design without the need for expensive tooling or forms such metal molds and reduces the need for traditional MMCs processing method. Uniform mixed powder is important for producing MMCs. Although ball mills have been used in previous studies, there are problems with the length of the mixing time and the uniformity of the powder, and it is necessary to study the mixing method. Therefore, this study investigated the production of SUS316L/Al2O3 mixed powder for L-PBF using the dry impact blending method that is a method in which material powder is dispersed in a high-speed air flow and the powder is mixed by mechanical impact force. A composite powder was produced with a mixing time of 60-900 seconds for SUS316L powder weight : Al2O3 powder weight were 1 : 0.4 as a theoretical compounding weight and 1 : 0.4 as a theoretical compounding weight of 25%. As a result, it was found that a powder suitable for L-PBF with a single peak particle size distribution was produced in performed for 300 seconds or more with a theoretical composition of 25%.

Low-temperature synthesis and characterization of lead-free BaTi0.89Sn0.11O3 piezoelectric powders

Barium stannate titanate (BaTi0.89Sn0.11O3, BTS11) is one of the reported lead-free materials that exhibit high dielectric and piezoelectric properties near ambient temperature. In this work, BTS11 powders were elaborated via a soft chemistry method at very low temperatures using two synthesized approaches combining sol-gel and hydrothermal processes. In the first approach, the effect of the barium precursor on the purity and the crystallinity of the BTS11 powders were studied. In contrast, in the second approach, the influence of the hydrothermal temperature on the BTS11 proprieties was analyzed. As a result, pure and uniform fine powders were obtained at 180 °C. The appropriate mass fraction of BTS11, which leads to high suspension stability in water, is below 3%. These eco-friendly and pure piezoelectric powders can be used without further heat-treatment in several applications such as lead-free piezoelectric decontamination of organic pollutants and photocatalyst, hydrogen generation and as fillers in flexible nanocomposites nano-generators for energy harvesting and energy storage.

A novel green process for the synthesis of high-whiteness and ultrafine aluminum hydroxide powder from secondary aluminum dross

Secondary aluminum dross (SAD) is a dangerous pollutant as well as a valuable resource. About 95% SAD is disposed by stockpiling on the spot due to its complex composition and technical limitations, causing severe ecological damage and public health threat. A novel green process was developed herein for the preparation of high-whiteness and ultrafine Al(OH) 3 from SAD. The SAD mixed with Na 2 CO 3 and CaO was dry molded and roasted, then the Al and Na elements were efficiently extracted to produce a high-value product. The phase transition path and toxic element transfer behavior of the roasting and leaching processes were investigated by thermodynamic analysis, X-ray diffraction analysis, X-ray fluorescence spectroscopy, scanning electron microscopy, and chemical analysis. The recovery of Al and Na reached 95.12% and 97.33%, respectively, under the optimum conditions (roasting temperature of 1150 °C, Na 2 CO 3 /SAD mass ratio of 80%, CaO/SAD mass ratio of 24%, and roasting time of 1 h). The removal rates of Cl, N, and soluble F in the roasting product were 95.38%, 98.68%, and 98.57%, respectively. The test results showed a purity of 99.17%, a whiteness of 98.1 and an average volume particle size D(4, 3) of 2.053 μm for the prepared high-whiteness and ultrafine Al(OH) 3 powder with uniform powder morphology. A cost analysis based on laboratory-scale data and market price indicates that a net profit of $431.6 can be obtained by recycling one ton SAD. The detoxification of SAD and the valuable Al element extraction can be achieved effectively by the green process. • A green and economic process for recycling secondary aluminum dross is proposed. • Dry molded roasting achieves both detoxification and recycling of aluminum dross. • Various factors affecting Al and Na recovery are evaluated and optimized. • Migration behavior of toxic elements in roasting process is investigated. • High-whiteness and ultrafine Al(OH) 3 product shows excellent physical properties.

Relationship between powder properties and uniformity of ribbon property using feeding guider designs with thermography (PAT) in roller compaction

Roller compaction is a continuous dry granulation process in which two counter-rotating rollers compress the powder. The feeding of powder to the compaction zone has a significant effect on product quality in the process. This work aims to improve ribbon property uniformity using new feeding guiders and develop a relationship map. The feeding guiders were designed in a range of grades considering the different powder properties and process parameters to achieve a uniform powder feeding to the compaction zone. An online thermal imaging camera was used as a process analytical technology to monitor the powder compaction and the uniformity of temperature across ribbon width, which was indirectly related to the powder distribution. The uniformity of the ribbon temperature of all powders increased from 20% using the original design to about 70% using the optimum design of the guiders, which indicated better powder distribution during the compaction. A relationship was also investigated for different materials with varying properties, grades of feeding guider and roller forces, which is useful for the design of experiments and predicting relative temperature uniformity of other materials.

High-gravitational effect on process stabilization for metal powder bed fusion

Additive manufacturing is a technology that enables mass customization of products owing to its flexibility and is one of the key technologies used in Internet-of-Things-based manufacturing systems. In recent years, industrial applications of additive manufacturing have been increasing, and expanding into space manufacturing. However, the controllability of gravitational acceleration has not been well explored. In this study, a high-gravitational powder bed fusion system is developed, which produces a high-gravitational field via the application of centrifugal acceleration. It is evident that the powder bed quality is improved, and the spatter generation is dramatically suppressed on applying a high gravitational acceleration of up to 10+ G. The experimental evaluations demonstrate that a high gravitational field improves the surface quality, density, and hardness of the fabricated parts. • High gravity up to 10G was applied during PBF process. • Spatter generation weakened in the higher gravitational field. • Powder flowability increases resulting uniform powder bed. • 10G has the effect for reducing boring phenomenon occurrence. • Density and hardness increased in the deposit produced in 10G.

Spatial mapping of powder layer density for metal additive manufacturing via transmission X-ray imaging

Uniform powder spreading is a requisite for creating consistent, high-quality components via powder bed additive manufacturing (AM), wherein layer density and uniformity are complex functions of powder characteristics, spreading kinematics, and mechanical boundary conditions. High spatial variation in particle packing density, driven by the stochastic nature of the spreading process, impedes optical interrogation of these layer attributes. Thus, we present transmission X-ray imaging as a method for directly mapping the effective depth of powder layers at process-relevant scale and resolution. Specifically, we study layers of nominal 50-250 micrometer thickness, created by spreading a selection of commercially obtained Ti-6Al-4V, 316 SS, and Al-10Si-Mg powders into precision-depth templates. We find that powder layer packing fraction may be predicted from a combination of the relative thickness of the layer as compared to mean particle size, and flowability assessed by macroscale powder angle of repose. Power spectral density analysis is introduced as a tool for quantification of defect severity as a function of morphology, and enables separate consideration of layer uniformity and sparsity. Finally, spreading is studied using multi-layer templates, providing insight into how particles interact with both previously deposited material and abrupt changes in boundary condition. Experimental results are additionally compared to a purpose-built discrete element method (DEM) powder spreading simulation framework, clarifying the competing role of adhesive and gravitational forces in layer uniformity and density, as well as particle motion within the powder bed during spreading.

Ultra-fine powder extinguishing agent concentration measurement based on extinction method

Ultra-fine powder extinguishing agent (UPEA) concentration measurement is essential for evaluating the validity of aircraft nacelle fire extinguishing system. Based on Beer-Lambert law, the influence of powder contamination, ambient light, and other factors on the measurement signal during high-concentration measurement by the extinction method has been analyzed. We proposed a correction model of the relationship between transmittance and high mass concentration of powder. An optical fiber UPEA concentration measurement device based on the extinction method has been developed. Meanwhile the calibration test platform for the occurrence of stable and uniform concentration powder has been built. The mass concentration of sodium bicarbonate UPEA that is promising halon replacement agent in aircraft nacelle is analyzed by developed device. The results show the modified relational model function fits the test data well, and the device measures concentrations up to 128.8 g / m3 with an indication error of 11.7%. The present work provides a new concentration measurement method for high-concentration powder measurement, especially the real-time measurement of UPEA concentration.

Gasification kinetics of char derived from metallised food packaging plastics waste pyrolysis

This research aims to study the gasification kinetics of char derived from metallised food packaging plastics waste (MFPWs) pyrolysis. The research began with treating char mechanically to obtain uniform char powder (MSRPs) composed of aluminium (Al), undecomposed organic fraction, and carbon particles. Subsequently, the MSRPs sample was treated again chemically to remove Al, thus preparing carbon black particles (BCPs). The chemical composition and morphology of the prepared MSRPs and BCPs samples were determined using elemental and proximate analysis, SEM, and XRD. Meanwhile, thermogravimetric analyser (TGA-DTG) was used to study the thermal stability of MSRPs and BCPs samples in different CO2/N2 concentrations: 20/80, 25/75, and 30/70 vol%. Once the tested samples stabilized at the target temperature the gasification analysis was started. Finally, gasification kinetics of MSRPs and BCPs samples were investigated using Random Pore Model (RPM) and Hybrid Modified Random Pore Model (HMRPM) based on thermogravimetric results. The proximate results showed that the MSRPs were rich in volatile matter (41.5 wt%), while ash (51.1 wt%) was the major component in the BCPs sample. The TGA-DTG gasification results revealed that MSRPs sample can decompose in three zones with a total weight loss of 45 wt%, while the BCPs samples decomposed linearly with a total weight loss of 22 wt%. The kinetic results showed that Al leaching, gasification temperature, and CO2/N2 concentrations have a significant effect on prediction of gasification kinetics parameters and deviation of their fitting curves.

Numerical simulation of the flow behavior and powder spreading mechanism in powder bed-based additive manufacturing

The flow behavior of the powder layer significantly affects subsequent dynamic behavior and final quality of the parts fabricated via powder bed-based additive manufacturing. High powder layer quality is the key scientific problem and technical difficulty, however, the dynamic flow behavior of powder particles and its relationship between powder layer quality were not well understood. In this paper, the influences of typical factors including process parameters (relative layer height and blade velocity) and powder properties (particle size and surface energy coefficient) on powder layer quality of polyamide 6 were systematically investigated by discrete element method to understand the mechanism of the powder layer packing behavior at the particle scale. The packing density, structure uniformity, normalized layer thickness, and surface uniformity were introduced to quantitatively characterize the powder layer quality. The mechanisms at the particle scale, including the blocking of particle, force arch, particle velocity distribution, and cohesion effect were discussed in detail. The results showed that a decreasing value particle size/layer height can effectively weaken the blocking effect of particles, improving the continuity and stability of powder flow and inducing a dense and uniform powder layer. The particles with high average velocity in the gap between the blade and baseplate will move forward after the blade leaves, significantly reducing the layer thickness and packing density. Meanwhile, the cohesion force was determined by the particle size and surface energy coefficient, and the cohesion effect dominated the flow behavior of the particles with a small particle size d = 10μm or a large surface energy coefficient γ = 0.2mJ/m2. These findings can provide useful guidance in understanding the flow behavior at the particle scale and improving the powder layer quality.

Combustion Synthesis of Aluminum Oxynitride in Loose Powder Beds.

This paper describes combusting loose powder beds of mixtures of aluminum metal powders and aluminum oxide powders with various grain sizes under various nitrogen pressure. The synthesis conditions required at least 20/80 weight ratio of aluminum metal powder to alumina powder in the mix to reach approximately 80 wt% of γ-AlON in the products. Finely ground fused white alumina with a mean grain size of 5 μm was sufficient to achieve results similar to very fine alumina with 0.3 μm grains. A lower nitrogen pressure of 1 MPa provided good results, allowing a less robust apparatus to be used. The salt-assisted combustion synthesis upon addition of 10 wt% of ammonium nitrite resulted in a slight increase in product yield and allowed lower aluminum metal powder content in mixes to be ignited. Increasing the charge mass five times resulted in a very similar γ-AlON yield, providing a promising technology for scaling up. Synthesis in loose powder beds could be utilized for effective production of relatively cheap and uniform AlON powder, which could be easily prepared for forming and sintering without intensive grounding and milling, which usually introduce serious contamination.

Preparation of highly uniform molybdenum powder by the short-process reduction of molybdenum trioxide with hydrogen

A novel short-process for preparing molybdenum powder is proposed in this paper in which the hydrogen flow direction is changed from traditional top diffusion to bottom blowing. The results showed that the short-process prevented sintering of the MoO2 reduction product in the first stage and permitted the continuous reduction of MoO3 by hydrogen without crushing or screening. Compared with top diffusion, when the hydrogen flow rates were 300 mL min−1 and 600 mL min−1 in the short-process, the time required for complete reduction in the second stage was shortened by 33.3% and 37.5%, respectively. In addition, the molybdenum powder obtained by the short-process was finer and more uniform, and the oxygen content was lower. The average particle size of molybdenum powder was only 1.89 μm, and the lowest oxygen content was only 1050 ppm at a hydrogen flow rate of 600 mL min−1. This novel process significantly improved the reduction efficiency and shows great potential for energy conservation and emission reduction.

Improvement of the flowability of fine yttrium oxide powders by microwave oxygen plasma and evaluation of the dense coating layer

Ceramic powders such as yttrium oxide and aluminum oxide have been extensively used to coat the inner walls and components of chambers used in semiconductor fabrication processes. Fine powders are used to form a dense coating layer by techniques such as thermal spray coating. However, fine powders exhibit strong cohesive forces due to surface roughness and interparticle van der Waals forces. This results in low flowability, a nonuniform powder feed, and nonuniform coatings. Microwave O2 plasma is proposed to improve the flowability of fine Y2O3 powder for a uniform powder supply in the spray coating process. Microwave O2 plasma flames produce a high temperature with active oxygen species at atmospheric pressure. The active oxygen species of plasma are incorporated into the lattice of powder particles, electrically stabilizing the powder, decreasing the static electricity, and reducing interparticle van der Waals forces. In addition, the surface of the fine powder is melted and smoothed by the high temperature of the microwave plasma, so that the powder acts as a dry lubricant. The processed powder was employed to coat a surface using atmospheric thermal spray coating, and the coating was characterized in comparison to a coating produced using commercial powder. The plasma-treated powder produced a coating with higher density and strength and lower porosity and surface roughness. The plasma-treated powder has a high flowability of 2.38 g s−1 and an apparent density of 2.07 g cm−1. Accordingly, the coating layer has a higher adhesion strength of 8.75 MPa and hardness of 651 HV0.3. In addition, its surface roughness of 0.9 μm and porosity of 0.2% are lower than those of a commercial sample.

Critical Current Distributions of Recent Bi-2212 Round Wires

Bi-2212 is the only high-field, high-temperature superconductor (HTS) capable of reaching a critical current density $J_{\text{c}}$(16 T, 4.2 K) of 6500 $\mathrm{A\cdot mm^{-2}}$ in the highly desirable round wire (RW) form. However, state-of-the-art Bi-2212 conductors still have a critical current density ($J_{\text{c}}$) to depairing current density ($J_{\text{d}}$) ratio around 20 to 30 times lower than that of state-of-the-art $\mathrm{Nb-Ti}$ or REBCO. Previously, we have shown that recent improvements in Bi-2212 RW $J_{\text{c}}$ are due to improved connectivity associated with optimization of the heat treatment process, and most recently due to a transition to a finer and more uniform powder manufactured by Engi-Mat. One quantitative measure of connectivity may be the critical current ($I_{\text{c}}$) distribution, since the local $I_{\text{c}}$ in a wire can vary along the length due to variable vortex-microstructure interactions and to factors such as filament shape variations, grain-to-grain connectivity variations and blocking secondary phase distributions. Here we compare $\sim$ 0.1 m length $I_{\text{c}}$ distributions of Bi-2212 RWs with recent state-of-the-art very high-$J_{\text{c}}$ Engi-Mat powder and lower $J_{\text{c}}$ and older Nexans granulate powder. We do find that the $I_{\text{c}}$ spread for Bi-2212 wires is about twice the relative standard of high-$J_{\text{c}}$ $\mathrm{Nb-Ti}$ well below $H_{\text{irr}}$. We do not yet see any obvious contribution of the Bi-2212 anisotropy to the $I_{\text{c}}$ distribution and are rather encouraged that these Bi-2212 round wires show relative $I_{\text{c}}$ distributions not too far from high-$J_{\text{c}}$ $\mathrm{Nb-Ti}$ wires.

Evaluation of spheroidized tungsten carbide powder produced by induction plasma melting

SYNOPSIS Tungsten carbide is a fine grey powder. It can be formed into shapes by compacting with the addition of a binder. Spherical particles are generally preferred in additive manufacturing as they pack together more efficiently than non-spherical particles, promoting a uniform powder bed density, better flowability, and elimination of internal cavities and fractures, resulting in a better quality of final product. The particle shape of powders can be transformed into spherical through the process of spheroidization. However, due to its high melting point, tungsten carbide could be difficult to spheroidize. Tungsten carbide was spheroidized using an inductively coupled radio frequency plasma at various plate powers between 9 and 15 kW. The influence of additional H2 in the sheath gas on the chemical composition of the tungsten carbide product was also investigated by means of XRD, which indicated that WC is converted to W2C at higher H2 concentrations. Optical analysis of SEM micrographs indicated that the spheroidization ratio increased with increased plasma energy. Keywords: spheroidization, induction plasma melting, tungsten carbide.

Graphene decorated aluminum nano composite with improved micro hardness and electrical conductivity

Composites of Al-graphene (0.2–0.6 wt%) were successfully prepared by solid state technique. Powder composites were prepared by ball milling technique. Ball milling was carried out under argon atmosphere. 4 hrs of milling was carried out for developing uniform powder composite. For developing lattice diffusion between Al and graphene, sintering at 570 °C for 7 hrs was done under argon atmosphere. Composites were evaluated by X-ray diffraction (XRD), transmission electron microscope (TEM), micro Raman, electrical conductivity and micro hardness. The typical Al + graphene (0.6 wt%) composite was found to show significant higher hardness and electrical conductivity in comparisons to pure Aluminium.

Influences of powder morphology and spreading parameters on the powder bed topography uniformity in powder bed fusion metal additive manufacturing

Powder spreading is a crucial step in the powder bed fusion process, which controls the quality of powder bed and consequently affects the quality of printed parts. To date, however, powder spreadability has received very little attention and substantial fundamental work is still needed, largely because of the lack of experimental studies. Therefore, the focus of the present study addresses the influences of powder morphology, spreading velocity and layer thickness on the powder bed topography uniformity. The experiments were conducted with a laser powder bed fusion printer and the powder layers were spread systematically and comprehensively assessed. In summary, it was found that particle sphericity and surface texture dictates the degree of impact that the spreader velocity and the layer thickness exert on the quality of powder bed topography in spread layers. The spreader velocity has substantial influence on powder bed uniformity, such that better uniformity is achieved with low spreading velocities, ≤ 80 mm/s. Powders with a wide particle distribution and containing large number of fine particles (< 25 µm) enabled formation of uniform and dense powder beds, however such powders were found to be more affected by segregation. In addition to these observed effects, for the first time, the major process related challenges to powder spreadability and powder bed quality are reported in this study. • Powder flowability alone does not ensure the formation of powder layers of uniform quality. • Powder bed topography is influenced by the powder morphology, spreading conditions and the particles net interaction. • Powder bed topography uniformity is maximised as particle sphericity and smoothness increases. • Particle segregation is highly influenced by particle size distribution, spreading velocity and depth of irradiated material.

Green Synthesis of Ba1−Sr TiO3 ceramic nanopowders by sol-gel combustion method using lemon juice as a fuel: Tailoring of Microstructure, ferroelectric, dielectric and electrical properties

Abstract This article represents a simple, economic and low-temperature green combustion synthesis of Ba1−xSrxTiO3 (BST) ceramic nanopowders for composition x = 0.0, 0.2, 0.4, 0.6, 0.8 and 1.0 with lemon juice as a firing agent. The fabricated nanopowders were characterized by TGA/DSC, XRD, FTIR, FESEM, TEM etc. analytical techniques. XRD analysis reveals the formation of single-phasic tetragonal perovskite structure with no impurity phases for x = 0.0 to 0.2 samples. However, cubic phase was appeared for x = 0.4 to 1.0 samples. FTIR spectroscopic study evidenced the formation of perovskite structure by demonstrating a noticeable band in between 400 and 750 cm−1. The Scherrer and Williamson-Hall (W–H) analysis was utilized to evaluate the crystallite size. TEM study showed that, spherical shaped and uniform nanocrystalline powders (23–28 nm) were fruitfully synthesized. The saturation electric polarization (Ps), remanence polarization (Pr) and coercive field (Ec) decreases with increase in Sr2+ content expected to be dependent on the creation of oxygen vacancies and occurrence of cubic polymorphs by doping of Sr2+ ions. The ideal ferroelectric characteristics were obtained Ps = 5.6661 μC/cm2 and Ec = 2.1242 kV for pristine BaTiO3 sample. Dielectric constant (e’) was obtained at room temperature as a function of frequency, which shows exponential decay with the increase of frequency. The Maxwell-Wagner polarization and dipole polarization were existing in the Sr2+-substituted BaTiO3 nanopowders and were responsible for the obtained dielectric properties. The variation of DC-electrical resistivity (log ρ) versus temperature (300 K–833 K) was observed to be decreased with increasing temperature and Sr2+ substitution; demonstrating that an electrical energy transfer was a thermally stimulated procedure. The Sr2+-substitution has brought an overall enhancement in dielectric and electrical properties. However, the ferroelectric characteristics are weakened, which is primarily attributed to a considerable variation in the micro-structure of the solid.