首页|Fabrication of High Thermal Conductivity β-Si_3N_4 Ceramics at Relatively Low Temperature Using MgSiN_2as Additives

Fabrication of High Thermal Conductivity β-Si_3N_4 Ceramics at Relatively Low Temperature Using MgSiN_2as Additives

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  • Trans Tech Publications Ltd
Silicon nitride ceramics with MgSiN_2 as additives were sintered by hot pressing at 1600°～ 1750℃ for 1-12 h under uniaxial pressure of 20 MPa. The specimens were characterized by x-ray diffraction, scanning electron microscopy, transmission electron microscopy and photothermal deflection spectroscopy. After sintered at 1750℃ for 1 h, the thermal conductivity of the material was 90 W·m~(-1)·K~(-1). The thermal conductivity could remarkably increase to 120 W·m~(-1)·K~(-1) by prolonging the dwell time from 1 h to 12 h. The present work demonstrated that MgSiN_2 additives were effective to improve the thermal conductivity of β-Si_3N_4 ceramic.

β-Si_3N_4thermal conductivitylow temperatureMgSiN_2

Gui-Hua Peng、Zhen-Hua Liang、Feng-Qi Lu、Qian Liu、Wen-Lan Li

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School of Chemistry & Chemical Engineering, Guangxi Normal University, Guilin 541004, China State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

School of Chemistry & Chemical Engineering, Guangxi Normal University, Guilin 541004, China

State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

2010

10.4028/www.scientific.net/KEM.434-435.783

Key engineering materials

Key engineering materials

ISSN：1013-9826
年,卷(期)：2010.434/435
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