Thermal conductivity of pressureless sintered Si3N4 ceramics with Li-exchanged zeolite

Journal of the Serbian Chemical Society

Bošković Snežana B.¹  Matović Branko Z.¹ 

[1] The Vinča Institute of Nuclear Sciences, Belgrade, Serbia and Montenegro;

关键词: pressureless sintering;    silicon nitride;    thermal conductivity;   

DOI  :  10.2298/JSC0409705M

来源: DOAJ

【 摘 要 】

The effects of temperature on the thermal conductivity of Si3N4 sintered with Li-exchanged zeolite were investigated. The highest conductivity was measured for the ceramics sintered with 10 % of additive. The complete α→β-Si3N4 transformation and maximum density (> 98 % TD) were attained with the sample sintered at 1650 ºC. However, the results show that Al and O from the additive dissolve into the β-Si3N4 structure which act as phonon scattering sites resulting in a lowering of the conductivity and a weaker temperature dependance of the conductivity.

【 授权许可】

Unknown