Low-temperature synthesis and sintering of γ-Y2Si2O7

Sun, Ziqi, Zhou, Yanchun, & Li, Meishuan (2006) Low-temperature synthesis and sintering of γ-Y2Si2O7. Journal of Materials Research, 21(6), pp. 1443-1450.

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Abstract

In this article, a novel pressureless solid-liquid reaction method is presented for preparation of yttrium disilicate (γ-Y2Si2O7). Single-phase γ-Y2Si2O7 powder was synthesized by calcination of SiO2 and Y2O3 powders with the addition of LiYO2 at 1400 °C for 4 h. The addition of LiYO2 significantly decreased the synthesis temperature, shortened the calcination time, and enhanced the stability of γ-Y2Si2O7. The sintering of these powders in air and O2 was studied by means of thermal mechanical analyzer. It is shown that the γ-Y2Si2O7 sintered in oxygen had a faster densification rate and a higher density than that sintered in air. Furthermore, single-phase γ-Y2Si2O7 with a density of 4.0 g/cm3 (99% of the theoretical density) was obtained by pressureless sintering at 1400 °C for 2 h in oxygen. Microstructures of the sintered samples are studied by scanning electron microscope.

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ID Code: 94647
Item Type: Journal Article
Refereed: Yes
DOI: 10.1557/jmr.2006.0173
ISSN: 2044-5326
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Deposited On: 08 Apr 2016 06:42
Last Modified: 20 Apr 2016 06:26

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