Synthesis of Anisotropic Na0.5Bi0.5TiO3 Crystals Using Different Topochemical Microcrystal Conversion Methods

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• 作者：Wei Zhao ; Nianqi Liu ; Kexin Gao ; Zihao Wang and Shimeng Zhang
• 刊名：International Journal of Applied Ceramic Technology
• 出版年：2016
• 出版时间：September/October 2016
• 年：2016
• 卷：13
• 期：5
• 页码：871-875
• 全文大小：744K
• ISSN：1744-7402

文摘

Na_0.5Bi_0.5TiO₃ (NBT) platelets with high aspect ratio were synthesized from Na_0.5Bi_4.5Ti₄O₁₅ (NBIT) precursors via a topochemical microcrystal conversion in molten salt conditions. The effect of the synthesis parameters, such as the molten salt system, synthesis temperature, and the molar ratio of Na₂CO₃ and NBIT, was investigated. The results showed that NaCl–KCl molten salt environment and excess Na₂CO₃ played a positive role in the synthesis, square-shaped NBT was obtained at 950°C in NaCl–KCl molten salt and a TiO₂-free environment, and it was a suitable template candidate to achieve NBT-based textured ceramics using the reactive template grain growth (RTGG) method.