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The effects of sintering additives on dielectric loss tangent of AlN ceramics have been investigated. Different amounts of Y 2 O 3 and ZrO 2 were added as sintering additives to AlN powder and pressureless sintering was performed at 1900°C for 2h in a flowing nitrogen atmosphere. ZrN phase was detected in AlN ceramics when ZrO 2 addition was more than 0.1mol.%. Densification...
Wetting of SiC by molten E 2 O 3(ss) /AlN as a function of temperature up to 2000°C was investigated under argon and nitrogen atmospheres. E 2 O 3(ss) is a solid solution of rare earth oxides produced from xenotime by hydrometallurgy. Wetting was evaluated from contact angle measurements using the sessile drop method. Contact angle was around zero under argon atmosphere,...
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