Effect of sintering aids on thermal conductivity of Si3N4 ceramics

doi:10.3969/j.issn.1001-1935.2022.06.020

Abstract

Abstract: The effects of single,binary and ternary sintering aids on the thermal conductivity of Si₃N₄ ceramics were reviewed.The comprehensive analysis shows that the introduction of sintering aids can reduce the sintering temperature of Si₃N₄ ceramics,increase the density,and reduce the glass phase and oxygen contents,so that the Si₃N₄ grains grow up and contact more closely,thus effectively improving the thermal conductivity of Si₃N₄ ceramics.The binary sintering aids have the greatest influence on the thermal conductivity,and Si₃N₄ ceramics with high thermal conductivity can be obtained by appropriately adjusting the sintering aids addition or the ratio of sintering aids.

Key words: silicon nitride ceramics, sintering aids, thermal conductivity, density

摘要： 综述了一元烧结助剂、二元烧结助剂和三元烧结助剂对Si₃N₄陶瓷导热性能的影响。通过综合分析可知:烧结助剂的引入可降低Si₃N₄陶瓷的烧结温度,提高Si₃N₄陶瓷的致密度;也可降低Si₃N₄陶瓷中玻璃相和氧含量,从而使Si₃N₄晶粒长大,使晶粒接触更加紧密。进而有效改善Si₃N₄陶瓷的导热性能。其中,二元烧结助剂对Si₃N₄陶瓷导热性能影响最大,通过适量调整烧结助剂的含量或烧结助剂间的比例可得到热导率较高的Si₃N₄陶瓷。

关键词: Si₃N₄陶瓷, 烧结助剂, 热导率, 致密度

CLC Number:

TQ175

Guo Hongli, Yao Can, Cheng Benjun, Gu Qiang. Effect of sintering aids on thermal conductivity of Si₃N₄ ceramics[J]. Refractories, 2022, 56(6): 548-552.

郭红丽, 姚灿, 程本军, 顾强. 烧结助剂对Si₃N₄陶瓷导热性能影响的研究现状[J]. 耐火材料, 2022, 56(6): 548-552.

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Effect of sintering aids on thermal conductivity of Si₃N₄ ceramics

烧结助剂对Si₃N₄陶瓷导热性能影响的研究现状

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