Effect of LiYO2 on the synthesis and pressureless sintering of Y2SiO5

Abstract

Y2SiO5 has potential applications as a high-temperature structural ceramic and environmental/thermal barrier coating. In this work, we synthesized single-phase Y2SiO5 powders utilizing a solid–liquid reaction method with LiYO2 as an additive. The reaction path of the Y2O3/SiO2/LiYO2 mixture with variation in temperatures and the role of the LiYO2 additive on preparation process were investigated in detail. The powders obtained by this method have good sinterability. Through a pressureless sintering process, almost fully dense Y2SiO5 bulk material was achieved with a very high density of 99.7% theoretical.

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Acknowledgments

This work was supported by the National Outstanding Young Scientist Foundation for Y.C. Zhou (Grant 59925208), Natural Sciences Foundation of China (Grants 50232040, 50302011, and 90403027), and The “863” Project.

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Correspondence to Yanchun Zhou.

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Sun, Z., Zhou, Y. & Li, M. Effect of LiYO2 on the synthesis and pressureless sintering of Y2SiO5. Journal of Materials Research 23, 732–736 (2008). https://doi.org/10.1557/JMR.2008.0085

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