Low-temperature synthesis and sintering of γ-Y2Si2O7
Data(s) |
2006
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Resumo |
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. |
Identificador | |
Publicador |
Cambridge University Press |
Relação |
DOI:10.1557/jmr.2006.0173 Sun, Ziqi, Zhou, Yanchun, & Li, Meishuan (2006) Low-temperature synthesis and sintering of γ-Y2Si2O7. Journal of Materials Research, 21(6), pp. 1443-1450. |
Fonte |
School of Chemistry, Physics & Mechanical Engineering; Science & Engineering Faculty |
Tipo |
Journal Article |