2成分系化合物添加による反応焼結Si_3N_4の低熱伝導化(第1報) : Al_2TiO_5添加複合材の作製と特性評価

概要

論文の詳細を見る
As a material with low thermal conductivity for ceram ic heat insulated engines, reaction bonded Si_3N_4 (RBSN) was thought to be promising. In order to reduce the thermal conductivity, 'RBSN composites were fabricated from Si and several kinds of oxides, and then their thermal conductivities and microstruc tures were investigated. It was shown that (1) Al_2TiO_5 was the most effective additive to reduce the thermal conductivity of RBSN and that the value showed a minimum of 2.6 W/m K at 35 wi% of Al_2TiO_5 content, (2) during sintering, Al_2TiO_5 decomposed and new phases formed multi phases in second phase in the sintered body, (3) temperature dependence of thermal conduc tivity decreased with increasing addition of AI_2TiO_5.
社団法人日本セラミックス協会の論文
1994-04-01