聚丙烯酸铵和柠檬酸铵分散剂对钇铝石榴石陶瓷透光率的影响

doi:10.11896/j.issn.1005-023X.2018.08.001

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Abstract Yttrium aluminum garnet (Y₃Al₅O₁₂, YAG) transparent ceramics were prepared by vacuum sintering with the addition of sintering aids and dispersants into YAG precursor. The precursor of YAG was prepared via ultrasound-microwave-assisted alkoxide hydrolysis precipitation method. The crystal structures, morphology and optical properties of transparent YAG ceramics with the addition of different dispersant were investigated. The results showed that pure-phase transparent YAG ceramics could be obtained with the addition of all kinds of dispersants. By adding the ammonium polyacrylic acid (NH₄PAA), no obvious boundaries were formed between crystalline grains and large pores emerged. With the addition of ammonium citrate (AC), well-dispersed crystalline grains could be formed with the average size of about 3 μm. The transmittance in the near-infrared waveband of the transparent YAG ceramic was 76% without the addition of dispersants. However, with the addition of NH₄PAA, the transmittance of the transparent YAG ceramics was reduced to only 51%, and when adding AC it rose back to 78%. The result indicates that AC can refine the grain size of the transparent YAG ceramics and promote the removal of residual pores, thus contribute to the formation of transpa-rent YAG ceramics with higher transmittance.

Key words： dispersants yttrium aluminum garnet alkoxide hydrolysis precipitation method transmittance

Published: 25 April 2018 Online: 2018-05-11

CLC number:

TG174.75

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	SI Wei
	DING Chao
	PAN Wei

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SI Wei,DING Chao,PAN Wei. Influence of Ammonium Polyacrylic Acid and Ammonium Citrate Dispersants on Transmittance of Yttrium Aluminum Garnet Ceramics[J]. Materials Reports, 2018, 32(8): 1209-1212.

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https://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.08.001 OR https://www.mater-rep.com/EN/Y2018/V32/I8/1209

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