Nanocrystalline BaTiO₃ powder via a sol process ambient conditions

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• 作者：Xinyu Wang ; Burtrand I. Lee ; Michael Hu ; E. Andrew Payzant and Douglas A. Blom
• 关键词：Sol– ; gel processes ; Powder-chemical preparation ; BaTiO₃ ; Titanates
• 刊名：Journal of the European Ceramic Society
• 出版年：2006
• 出版时间：2006
• 年：2006
• 卷：26
• 期：12
• 页码：2319-2326
• 全文大小：497 K

文摘

Nanocrystalline BaTiO₃ particles have been prepared by ambient condition sol (ACS) process starting from soluble precursors of barium and titanium yielding a mixed oxide/hydroxide gel. The gel was peptized and crystallized in water under a refluxing condition. Higher initial pH and Ba/Ti ratio led to smaller crystallite sizes of BaTiO₃ powders. Organic mineralizer, tetramethylammonium hydroxide (TMAH), can adsorb on the BaTiO₃ nuclei and inhibited further growth of the particles. Adding a polymer during BaTiO₃ synthesis led to a smaller particle size and increased redispersibility of the particles in water.