Thermal Conductivity Measurement System for Functional and Structural Products

Processes, Journal Year: 2024, Volume and Issue: 12(10), P. 2219 - 2219

Published: Oct. 11, 2024

An automated system for measuring the thermal conductivity of functional and structural materials was developed. The main building blocks setup are following: heating unit cooling creating a heat flux gradient in test sample; resistances temperature registration control; pads better contact between parts sample. effect on distribution fields developed studied by computer modelling. A control software based hardware implementation steady-state Fourier’s law-based method determination conductivity. stopping criterion is equality fluxes units, as well stability coefficient readings. testing calibration device were carried out using sample pure aluminum (99.999 wt.% Al). It found that experimental value at room (T = 22 °C) <λ> 243 ± 3 W/m·K. This consistent with literature data values obtained laser flash method, which ranges within λ 210–260

Language: Английский

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Boron Nitride Nanotubes Embedded Nylon-6 Nanofibers Composites for Space Applications

Solid State Sciences, Journal Year: 2024, Volume and Issue: unknown, P. 107819 - 107819

Published: Dec. 1, 2024

Language: Английский

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Understanding the dielectric properties of silicone rubber‐BN nanocomposites under DC voltage

Polymer Engineering and Science, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 2, 2024

Abstract The present study explores the dielectric and structural properties of silicone rubber composites with low‐weight percentages boron nitride (BN) fillers aimed at insulation applications. incorporation BN into matrix significantly enhances glass transition temperature ( T g ), melting m crystallization c ). Notably, constant increases while loss factor remains minimal a low concentration matrix. J–V characteristics from space charge limited current (SCLC) measurements were employed to evaluate trap density. addition 3 wt% filler notably improves crossover voltage density in A strong correlation has been observed between values derived SCLC surface potential decay experiments. Furthermore, different temperatures exhibit an Arrhenius behavior, providing insights transport trapping mechanisms. Overall, experiment results indicate that inclusion wt % significant improvement as well characteristics. Highlights impacts permittivity tan (δ) based on levels. Differential scanning calorimetry shows crystallinity changes increased rubber. Surface relates characteristics, following mechanism. relation temperature‐based thermally activated conduction. Trap trends align methods.

Language: Английский

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Boosting cement hydration with boron nitride nanotubes

Cement and Concrete Composites, Journal Year: 2024, Volume and Issue: unknown, P. 105894 - 105894

Published: Dec. 1, 2024

Language: Английский

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