Synthesis and characterization of LaPO₄-coated α-Al₂O₃ powders

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• 作者：Qiuju Zheng ; Xin Wang ; Jintao Tian ; Zifeng Liu ; Chuanshun Huang ; Jing Wang ; Jihui Xu
• 关键词：A. Powders ; chemical preparation ; B. Composites ; C. Chemical properties ; Heterogeneous nucleation processing
• 刊名：Ceramics International
• 出版年：2009
• 出版时间：March 2009
• 年：2009
• 卷：35
• 期：2
• 页码：897-900
• 全文大小：485 K

文摘

LaPO₄-coated α-Al₂O₃ powders were successfully synthesized through the heterogeneous precipitation method. The coated powders were characterized by XRD, TEM, EDS, and zeta-potential measurements. According to the XRD results, the coated powders consisted of only α-Al₂O₃ and monoclinic LaPO₄. The TEM examinations and EDS analysis showed that under alkaline condition a homogeneous coating with thickness of 10 nm was obtained on the α-Al₂O₃ powder surface. The zeta-potential measurements showed the coated powders to have a pH value of 7.85 at isoelectric point, similar to that of LaPO₄ (pH value of 8.21). This was in good agreement with the TEM and EDS results, indicating a successful coating process in our experiment.