Influence of Sintering Aids on the Sintering and Conductivity Properties of Si3N4 Composites

Y. Jiang; Lan Er Wu; Wan Xiu Hai

doi:10.4028/www.scientific.net/KEM.697.457

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 697Influence of Sintering Aids on the Sintering and...

Influence of Sintering Aids on the Sintering and Conductivity Properties of Si₃N₄ Composites

Abstract:

Silicon nitride (Si3N4) is one of the most important engineering materials. The developing trend of Si3N4 ceramic should be its composite with reinforce phase. However, due to its low self-diffusion coefficient at high temperature, the Si3N4 is very hard to be densified without sintering aids. In the present work, the Y2O3 and light rare-earth oxides of La series (La2O3, CeO2, Pr2O3, Sm2O3) and AlN, Al2O3, MgO, CaCO3 were chosen to be sintering aids. Their effect on the sintering of Si3N4 composite was studied. The results showed that the Y2O3 was the best sintering aid in all members, and the Y2O3-La2O3-AlN ternary composition was the best formula.

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Periodical:

Key Engineering Materials (Volume 697)

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457-461

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.697.457

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Online since:

July 2016

Authors:

Y. Jiang*, Lan Er Wu, Wan Xiu Hai

Keywords:

Si₃N₄, Sintering Additives

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