Fabrication of textured bismuth titanate by templated grain growth using aqueous tape casting
Fabrication of textured bismuth titanate by templated grain growth using aqueous tape casting
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DOI：
10.1016/s0955-2219(03)00035-9
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发表时间：
2003-11
影响因子：
5.7
通讯作者：
Y. Kan;Pei-ling Wang;Yongxiang Li;Yi-bing Cheng;D. Yan
中科院分区：
文献类型：
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作者：
Y. Kan;Pei-ling Wang;Yongxiang Li;Yi-bing Cheng;D. Yan
以熔融盐法制备的板状Bi4Ti3O12颗粒为模板，采用模板晶粒生长（TGG）法制备了结构化钛酸铋（Bi4Ti3O12）陶瓷。通过水带浇铸，使模板主表面平行于浇铸平面，在细晶基体中排列。研究了烧结条件对材料晶粒取向的影响。晶粒取向度（Lotgering factor, f）随烧结温度、保温时间和升温速率的增加而增大。高Lotgering因子（f小于0.92）可以通过仔细控制烧结参数获得。织构bi4ti3o12陶瓷的介电性能在平行和垂直于铸造面方向上表现出较高的各向异性。
Textured bismuth titanate (Bi4Ti3O12) ceramics were fabricated by templated grain growth (TGG), using plate-like Bi4Ti3O12particles prepared by a molten salt method as the templates. The templates were aligned in the fine-grained matrix by aqueous tape casting with their major surface parallel to the casting plane. Effect of sintering conditions on the grain orientation in the material was investigated. It was found that the degree of grain orientation (Lotgering factor, f) increased with the increase in sintering temperature, soaking time and heating rate. High Lotgering factor (f⩾0.92) can be obtained through careful control of the sintering parameters. The textured Bi4Ti3O12ceramics showed a high anisotropy in its dielectric properties in the directions parallel and perpendicular to the casting plane.