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

Chii Shyang Hwang; Der Yang Fang

doi:10.2109/jcersj.100.1159

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

Chii Shyang Hwang, Der Yang Fang

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10 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 language	English
Pages (from-to)	1159-1164
Number of pages	6
Journal	Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
Volume	100
Issue number	1165
DOIs	https://doi.org/10.2109/jcersj.100.1159
Publication status	Published - 1992

All Science Journal Classification (ASJC) codes

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

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10.2109/jcersj.100.1159

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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.",

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AU - Fang, Der Yang

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N2 - 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.

AB - 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.

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

Abstract

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