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Enhanced Properties of Dense AlN Ceramics via in situ Reaction
Author(s) -
Zhao Yongjie,
Huang Rongxia,
Zhou Heping,
Ryu SungSoo
Publication year - 2012
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2012.02826.x
Subject(s) - materials science , ceramic , microstructure , thermal conductivity , sintering , aluminium , in situ , conductivity , composite material , chemistry , physics , meteorology
A novel approach to prepare dense AlN ceramics with high thermal conductivity was proposed. The aluminum isopropoxide ( AIP ) was introduced to prepare dense AlN ceramics possessing enhanced thermal conductivity via in situ reaction. The effect of AIP and sintering temperatures on the microstructure and properties of AlN ceramics were investigated. Results indicate that AIP is beneficial for the densification of AlN ceramics, and particularly, when the addition of AIP reaches 1 wt%, the density and thermal conductivity could reach up to 3.29 g/cm 3 , 182 W/mK, respectively. Finally, the mechanism of the in situ reaction was proposed.