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Low-temperature synthesis and sintering of γ-Y2Si2O7

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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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Authors and Affiliations

  1. High Performance Ceramic Division, Shenyang National Laboratory for Materials Science, Institute of Metal Research, Chinese Academy of Sciences, Shenyang, 110016, China

    Ziqi Sun, Yanchun Zhou & Meishuan Li

  2. Graduate School of Chinese Academy of Sciences, Beijing, 100039, China

    Ziqi Sun

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  1. Ziqi Sun
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  2. Yanchun Zhou
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Correspondence to Yanchun Zhou.

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Sun, Z., Zhou, Y. & Li, M. Low-temperature synthesis and sintering of γ-Y2Si2O7. Journal of Materials Research 21, 1443–1450 (2006). https://doi.org/10.1557/jmr.2006.0173

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  • DOI: https://doi.org/10.1557/jmr.2006.0173

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