Thermal conductivity of Ca α‐SiAlON ceramics with varying m and n values

Abstract

α-SiAlON is well known for its excellent mechanical properties, but its thermal properties are less investigated. In this work, we investigate the thermal conductivity of Ca α-SiAlON ceramics with varying m and n values and prepared samples by spark plasma sintering (SPS) at 1600 • C or gas pressure sintering (GPS) at 1800 • C and 1900 • C. The prepared Ca α-SiAlON ceramics showed thermal conductivities ranging from 4.6 to 10.7 W/(mK) at 25 • C. It was found that the thermal conductivity of the α-SiAlON samples could be reduced by increasing either m or n or both. Besides, the samples prepared by SPS had lower thermal conductivity compared with those by GPS due to their smaller grain size, and the effect of m and n would be minor after m reached 2. These results provide basic knowledge for tuning α-SiAlON's thermal conductivity for applications concerning thermal management.

Совершенствование Математической Модели Получения Мелкодисперсного Материала Для Создания Автоматизированной Системы Управления Процессом Производства

“…Также есть возможность менять состав шихты. В зависимости от применяемых в процессе производства марок песка и угля можно получать различные температурные поля в печи [23][24][25][26][27][28][29][30], следовательно, различный массовый выход карбида кремния и различные алгоритмы управления.…”