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A series of Sm2Zr2O7-SiC composites doped with different volume fraction and particle size of SiC were prepared by hot pressing at 1300 ℃. The phase of the composites prepared is P-Sm2Zr2O7 and C-SiC, and no other diffraction peaks exist, which indicates that Sm2Zr2O7 has great chemical compatibility with SiC. The thermal conductivity and phonon thermal conductivity of the Sm2Zr2O7-SiC composites are measured by the laser pulse method. The photon thermal conductivity of the composites is obtained by subtracting the phonon thermal conductivity from the total thermal conductivity. The results show that the photon thermal conductivity of Sm2Zr2O7-SiC composites is lower than that of pure Sm2Zr2O7. The photon thermal conductivity of Sm2Zr2O7-SiC composites decreases first and then increases with the increase of SiC particle size. Sm2Zr2O7-(5 vol%, 10 μm)SiC composite has the lowest photon thermal conductivity.


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Preparation and heat insulating capacity of Sm2Zr2O7-SiC composites based on photon thermal transport

Show Author's information Zhuang MAa,bQi ZHANGa,bLing LIUa,b( )Yanbo LIUa,b
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, China
Beijing Institute of Technology Chongqing Innovation Center, Chongqing 401120, China

Abstract

A series of Sm2Zr2O7-SiC composites doped with different volume fraction and particle size of SiC were prepared by hot pressing at 1300 ℃. The phase of the composites prepared is P-Sm2Zr2O7 and C-SiC, and no other diffraction peaks exist, which indicates that Sm2Zr2O7 has great chemical compatibility with SiC. The thermal conductivity and phonon thermal conductivity of the Sm2Zr2O7-SiC composites are measured by the laser pulse method. The photon thermal conductivity of the composites is obtained by subtracting the phonon thermal conductivity from the total thermal conductivity. The results show that the photon thermal conductivity of Sm2Zr2O7-SiC composites is lower than that of pure Sm2Zr2O7. The photon thermal conductivity of Sm2Zr2O7-SiC composites decreases first and then increases with the increase of SiC particle size. Sm2Zr2O7-(5 vol%, 10 μm)SiC composite has the lowest photon thermal conductivity.

Keywords:

rare-earth zirconates, thermal conductivity, photon thermal transport
Received: 31 December 2019 Revised: 20 May 2020 Accepted: 20 May 2020 Published: 01 July 2020 Issue date: August 2020
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Publication history

Received: 31 December 2019
Revised: 20 May 2020
Accepted: 20 May 2020
Published: 01 July 2020
Issue date: August 2020

Copyright

© The Author(s) 2020

Acknowledgements

This study was supported by the National Natural Science Foundation of China (No. 51772027).

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