Effect of LiYO2 on the synthesis and pressureless sintering of Y2SiO5


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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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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