Optimization of dispersing agents for preparing YAG transparent ceramics

The suspensions of the powder mixture of yttria and alumina were prepared by the aqueous tape casting method. Rodia DP270, Dolapix CE64, citric acid and Dammonium 3008 were used as dispersing agents. The morphologies of the powders and the fracture surface of the green body were observed by scanning...

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Published inJournal of rare earths Vol. 31; no. 5; pp. 507 - 511
Main Author 巴学巍 李江 潘裕柏 刘婧 姜本学 刘文斌 寇华敏 郭景坤
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.05.2013
Subjects
Aluminum oxide
ceramic
Ceramics
Dispersing
dispersion
Optimization
Rare earth metals
rare earths
Rheological properties
Scanning electron microscopy
tape casting
Y3Al5O12
YAG
Yttrium oxide
优化
分散剂
扫描电子显微镜
氧化铝粉末
粉末混合物
编制
透明陶瓷
ceramic
tape casting
Y3Al5O12
dispersion
rare earths
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Summary:The suspensions of the powder mixture of yttria and alumina were prepared by the aqueous tape casting method. Rodia DP270, Dolapix CE64, citric acid and Dammonium 3008 were used as dispersing agents. The morphologies of the powders and the fracture surface of the green body were observed by scanning electron microscopy （SEM）. The zeta potential test was employed to characterize the surface charge states of different suspensions. The dispersion of the suspensions was analyzed by the rheological tests and the sedimentation experiments. The results indicated that the yttria and alumina powder mixtures were well dispersed by the dis- persing agents. The rheological curves showed shear thinning behavior. The most efficient dispersing agent was Dammonium 3008. The optimum usage of Dammonium 3008 was 1.0 wt.%. The green body was dense and no interface between the adjacent layers was found. The in-line transmittance of the as-sintered YAG ceramic was higher than 80% between 400 and 1100 urn.
Bibliography:The suspensions of the powder mixture of yttria and alumina were prepared by the aqueous tape casting method. Rodia DP270, Dolapix CE64, citric acid and Dammonium 3008 were used as dispersing agents. The morphologies of the powders and the fracture surface of the green body were observed by scanning electron microscopy （SEM）. The zeta potential test was employed to characterize the surface charge states of different suspensions. The dispersion of the suspensions was analyzed by the rheological tests and the sedimentation experiments. The results indicated that the yttria and alumina powder mixtures were well dispersed by the dis- persing agents. The rheological curves showed shear thinning behavior. The most efficient dispersing agent was Dammonium 3008. The optimum usage of Dammonium 3008 was 1.0 wt.%. The green body was dense and no interface between the adjacent layers was found. The in-line transmittance of the as-sintered YAG ceramic was higher than 80% between 400 and 1100 urn.
11-2788/TF
Y3Al5O12; tape casting; dispersion; ceramic; rare earths
BA Xuewei, LI Jiang, PAN Yubai, LIU Jing, JIANG Benxue, LIU Wenbin, KOU Huarnin, GUO Jingkun （1. Key Laboratory of Transparent Opto-functional Advanced Inorganic Materials, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China; 2 Graduate School of the Chinese Academy of Sciences, Beijing 100039, China; 3. School of Materials Science and Engineering, Qiqihar University, Qiqihar 161006, China; 4. Graduate school of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China）
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ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(12)60310-X