Fabrication of AMO₄ (A = Ba, Sr, Ca M = Mo, W) films on M substrate by solution reaction assisted ball rotation

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• 作者：Dinesh Rangappa ; Takeshi Fujiwara ; Tomoaki Watanabe and Masahiro Yoshimura
• 关键词：Alkaline earth tungstates ; Molybdates ; Film deposition ; Solution reaction and ball ; rotation
• 刊名：Journal of Electroceramics
• 出版年：2006
• 出版时间：December, 2006
• 年：2006
• 卷：17
• 期：2-4
• 页码：853-860
• 全文大小：705 KB

文摘

An alkaline earth molybdates and tungstates, such as AMoO₄ and AWO₄, films have been successfully fabricated on the respective metal substrate in AOH (A = Ba, Sr, Ca) solutions by a ball rotation-assisted solution reaction at room temperature. This film consists the polyhedral crystals of AMO₄ with an average grain size of 8 μm. The dissolution of substrate surface was mainly controlled by the concentration of H₂O₂ oxidizing agent and ball rotation to form MO₄ 2 − in the solution. AMO₄ was deposited on the substrate by the reaction between MO₄ 2 − and A2 + ions without any high energy or high temperature treatment. Also, the mass transport of alkaline earth ions on to the solid/solution interface was improved as a result of the vigorous solution agitation by the ball rotation. Therefore, the deposition rate of the AMO₄ films was accelerated by the ball rotation. A decrease in the grain size of the film was observed incase of an excessive ball rotation.