Effects of Y2O3 addition on the sinterability and microstructure of mullite (part 1) - phase transformation and sinterability -

Chii Shyang Hwang, Der Yang Fang

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

The effect of addition of Y2O3 on the sinterability and microstructure of mullite was studied by differential thermal analysis, X-ray powder diffraction, scanning and transmission electron microscopy, and dilatometry. The mullite powder compacts containing 2-10 wt% Y2O3 were sintered at 1500°C in air. The solid state reaction of Y2O3 and mullite during the sintering process produced some crystalline phases of yittrium silicates and α-Al2O3. The product phases were dependent on the amount of Y2O3 addition. The yittrium silicate and Al2O3 melted into a liquid phase at higher sintering temperature, which enhanced the sinterability of mullite powders. During the furnace cooling process, the liquid phase crystallized, and different crystalline phases were obtained depending on the amount of Y2O3.

Original languageEnglish
Pages (from-to)1159-1164
Number of pages6
JournalNippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume100
Issue number1165
DOIs
Publication statusPublished - 1992 Jan 1

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

Fingerprint Dive into the research topics of 'Effects of Y<sub>2</sub>O<sub>3</sub> addition on the sinterability and microstructure of mullite (part 1) - phase transformation and sinterability -'. Together they form a unique fingerprint.

  • Cite this