Optimization of dispersing agents for preparing YAG transparent ceramics
来源期刊：Journal of Rare Earths2013年第5期
论文作者：巴学巍 李江 潘裕柏 刘婧 姜本学 刘文斌 寇华敏 郭景坤
文章页码：507 - 511
摘 要：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 dispersing 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 assintered YAG ceramic was higher than 80% between 400 and 1100 nm.
巴学巍1,2,3，李江1，潘裕柏1，刘婧1,4，姜本学1，刘文斌1，寇华敏1，郭景坤1
1. Key Laboratory of Transparent Opto-functional Advanced Inorganic Materials,Shanghai Institute of Ceramics,Chinese Academy of Sciences2. Graduate School of the Chinese Academy of Sciences3. School of Materials Science and Engineering,Qiqihar University4. Graduate school of Materials Science and Engineering,Jiangsu University
摘 要：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 dispersing 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 assintered YAG ceramic was higher than 80% between 400 and 1100 nm.
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