Sinterability of SiO<sub>2</sub>-Al<sub>2</sub>O<sub>3</sub> Powders Prepared by Spray Pyrolysis
-
- KUMAZAWA Takeshi
- Technical Research Laboratory, Mino Yogyo Co., Ltd.
-
- KANZAKI Shuzo
- Government Industrial Research Institute
-
- ASAUMI Junji
- Central Research Laboratory, Nihon Cement Co., Ltd.
-
- ABE Osami
- Government Industrial Research Institute
-
- TABATA Hideyo
- Government Industrial Research Institute
Bibliographic Information
- Other Title
-
- 噴霧熱分解により合成したシリカ-アルミナ粉末の焼結性
- フンム ネツ ブンカイ ニ ヨリ ゴウセイシタ シリカ アルミナ フンマツ ノ
- Effect of Chemical Composition
- 化学組成の影響
Search this article
Abstract
The SiO2-Al2O3 powders containing 68 to 78wt% Al2O3 were synthesized by spray pyrolysis technique to study their sinterability at 1630°-1650°C. The prepared amorphous powders were transformed directly to crystalline mullite by calcination above 980°C. When heat-treated at temperatures above 1500°C, corundum was detected in the powder composed of 78wt% Al2O3. Densification of the silica-rich powder was accelerated by the formation of glassy phase, and the bulk density of alumina-rich powder also increased with the increase of alumina content. While, in the 3Al2O3⋅2SiO2 region, poor densification was observed. The shape of mullite grain in the sintered body changed from needle-like to roundish in compliance with the increase in alumina content, and corundum particles were observed along the grain-boundary in the sintered specimen of 78wt% Al2O3 content. Glassy phase which consists merely of silicon and oxygen was observed along the grain-boundaries of the 70wt% Al2O3 sintered body.
Journal
-
- Journal of the Ceramic Association, Japan
-
Journal of the Ceramic Association, Japan 94 (1089), 485-490, 1986
The Ceramic Society of Japan
- Tweet
Details 詳細情報について
-
- CRID
- 1390282680224961664
-
- NII Article ID
- 110002313463
-
- NII Book ID
- AN00245650
-
- ISSN
- 18842127
- 00090255
- http://id.crossref.org/issn/00090255
-
- NDL BIB ID
- 3081515
-
- Text Lang
- ja
-
- Data Source
-
- JaLC
- NDL
- Crossref
- CiNii Articles
-
- Abstract License Flag
- Disallowed