Thermal conductivity of micro hot-pressed AlN ceramics fabricated using a conventional MoSi2 heating element furnace

Chih Peng Lin, Chih Hung Chu, Shaw Bing Wen, Yun-Hwei Shen

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

AlN samples doped with sub-micron Y2O3 and CaO powders as sintering additives obtained using the micro hot-pressed (MHPed) sintering method in a MoSi2 heating element furnace were investigated. The minor amounts of secondary phases were identified as A1 5Y3O12, CaYAl3O7, and CaAl4O7, which are related to the low sintering temperature as well as the removal of oxygen-related defects in the system. Relative densities of over 96% of the theoretical value were obtained after sintering at 1600°C for 8 h, indicating that an adequate amount of additives and the use of the micro hot-pressed (MHPed) sintering process help improve the densification and thermal conductivity of AlN ceramics. The high thermal conductivity of 130 Wm-1'K-1 was attributed to the purification of the AlN lattice, the elimination of some secondary phases, and the grain boundary phase distribution.

Original languageEnglish
Pages (from-to)525-529
Number of pages5
JournalJournal of Ceramic Processing Research
Volume12
Issue number5
Publication statusPublished - 2011 Dec 19

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites

Fingerprint Dive into the research topics of 'Thermal conductivity of micro hot-pressed AlN ceramics fabricated using a conventional MoSi<sub>2</sub> heating element furnace'. Together they form a unique fingerprint.

Cite this