Pechini法制备Y2O3的煅烧温度对无压烧结AlON陶瓷透光性的影响

摘要/Abstract

摘要： 首先以Y(NO₃)₃·6H₂O为Y源,采用Pechini法制备前驱体,然后通过煅烧制得纳米Y₂O₃粉体,再将其作为烧结助剂,在1 880 ℃保温2.5 h无压烧结制备AlON透明陶瓷,研究前驱体煅烧温度对产物组成、形貌、粒度,以及所制备AlON陶瓷透光性的影响规律。结果表明,提高前驱体煅烧温度会促进有机物分解,但也会造成Y₂O₃颗粒长大,有机物残留和过大粒度的Y₂O₃粉体都不利于获得高致密度的高透光性AlON陶瓷。900 ℃煅烧2 h所得纳米Y₂O₃粉体适合作为快速无压烧结制备AlON透明陶瓷的烧结助剂,所制备的AlON陶瓷在波长~3 750 nm的透过率达83.4%。

关键词: Y₂O₃, Pechini法, AlON, 透明陶瓷, 烧结助剂, 无压烧结

Abstract: Using Y(NO₃)₃·6H₂O as yttrium source, nano-sized Y₂O₃ powder was obtained by calcining the precursor prepared by Pechini method. This Y₂O₃ powder was then used as a sintering additive to fabricate transparent AlON ceramics via pressureless sintering at 1 880 ℃ for 2.5 h. The effects of precursor calcination temperature on the composition, morphology and particle size of Y₂O₃ powder, as well as on the transparency of AlON ceramics were thoroughly studied. The results indicate that increasing calcination temperature of the precursor can promote the decomposition of organic compounds, but it also leads to the growth of Y₂O₃ particles. Residual organic compounds and excessive growth of Y₂O₃ powders are unfavorable for fabrication of AlON ceramics with high transmittance and high relative density. The nano-sized Y₂O₃ powder prepared by calcining the precursor at 900 ℃ for 2 h is favorable for the fabrication of highly transparent AlON ceramics via rapid pressureless sintering. The infrared transmittance of the obtained AlON ceramics reaches up to 83.4% at ~3 750 nm.

Key words: Y₂O₃, Pechini method, AlON, transparent ceramics, sintering additive, pressureless sintering

中图分类号:

TQ174.1

郭浩然, 闫晖, 单英春, 高铭泽, 徐久军, 李江涛. Pechini法制备Y₂O₃的煅烧温度对无压烧结AlON陶瓷透光性的影响[J]. 人工晶体学报, 2024, 53(11): 2004-2012.

GUO Haoran, YAN Hui, SHAN Yingchun, GAO Mingze, XU Jiujun, LI Jiangtao. Effects of Calcining Temperature in the Preparation of Y₂O₃ by Pechini Method on the Transparency of Pressureless Sintered AlON Ceramics[J]. JOURNAL OF SYNTHETIC CRYSTALS, 2024, 53(11): 2004-2012.

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Pechini法制备Y₂O₃的煅烧温度对无压烧结AlON陶瓷透光性的影响

Effects of Calcining Temperature in the Preparation of Y₂O₃ by Pechini Method on the Transparency of Pressureless Sintered AlON Ceramics

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