Preparation of spray-dried powders leading to Nd:YAG ceramics: The effect of PVB adhesive
Preparation of spray-dried powders leading to Nd:YAG ceramics: The effect of PVB adhesive
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DOI：
10.1016/j.ceramint.2011.06.061
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发表时间：
2012
影响因子：
5.2
通讯作者：
Wenbin Liu;Wenxin Zhang;Jiangxu Li;Di Zhang;Yu-bai Pan
中科院分区：
文献类型：
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作者：
Wenbin Liu;Wenxin Zhang;Jiangxu Li;Di Zhang;Yu-bai Pan
以Al2O3、Y2O3和Nd2O3粉末为原料，采用喷雾干燥技术制备混合粉末。引入聚乙烯醇缩丁醛（PVB）的主要目的是有助于粉末的喷雾造粒和抑制组合物偏析。讨论了PVB添加量（0、1、2和3wt%）对喷雾干燥粉末形貌和组成的影响。在1000°C下煅烧2h，以PVB为粘结剂的粉体具有较好的球形度和分散性。未检测到成分偏析。结果表明，PVB含量为2%（质量分数）的粉体经煅烧后可用于制备Nd：YAG透明陶瓷。相应的陶瓷由明确的显微结构组成，并且没有观察到孔隙或其他缺陷。
The mixed powders were obtained with Al2O3, Y2O3and Nd2O3powders as starting materials using spray drying technology. The main purpose of introducing polyvinyl butyral (PVB) is to contribute to spray granulation of the powders and inhibition of the compositions segregation. The effect of the addition of PVB (0, 1, 2, and 3wt%) on the morphologies and compositions of the spray-dried powders is discussed. When calcined at 1000°C for 2h, the powders with PVB as an adhesive show sphericity and better dispersion. No compositions segregation can be detected. It is found that the powders with 2wt% PVB after calcinations are suitable for the fabrication of Nd:YAG transparent ceramics. The corresponding ceramics consists of a well-defined microstructure, and no pores or other defects are observed.