Premium
Influence of Aluminum Titanate Formation on Sintering of Bimodal Size‐Distributed Alumina Powder Mixtures
Author(s) -
Taruta Seiichi,
Itou Yousuke,
Takusagawa Nobuo,
Okada Kiyoshi,
otsuka Nozomu
Publication year - 1997
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1997.tb02866.x
Subject(s) - sintering , materials science , aluminium , titanate , grain growth , grain size , particle size , chemical engineering , ceramic , metallurgy , mineralogy , composite material , chemistry , engineering
The sintering behavior of green compacts, in which coarse alumina particles formed a skeletal structure and fine alumina and/or fine titania particles filled the voids of the skeletal structure, was investigated. Sinterability of the green compacts changed according to the titania content in the fine powder. The titania content of 33 mol% was the most effective for the densification. The volume expansion due to the aluminum titanate formation occurred in the voids of the skeletal structure, and the densification of the skeletal structure progressed more because the grain growth between the fine and coarse alumina particles did not proceed. As the titania content decreased, the densification did not progress more than that of the compact with 33 mol% titania content because the grain growth proceeded more. As the titania content increased, the expansion of the compacts was larger, and large grains were formed by the reaction between the titania and coarse alumina particles. Therefore, densification became difficult.