Texture Formation in Barium Titanate-base Ceramics by Reactive-Templated

通过反应模板法在钛酸钡基陶瓷中形成织构

• 批准号: 14550670
• 负责人: KIMURA Toshio
• 金额: $ 2.3万
• 依托单位: Keio University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 2002
• 资助国家: 日本
• 起止时间: 2002 至 2003
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-14550670/
• 关键词: Crystallographic Ovlentation; Texture; Grain Orientation; Template; Grain Growth; Barium Titanate; Reactive-Template; Filler; Grain Growth Method

Crystallographically textured BaTiO_3 with <111>-and <100>-orientation was prepared by reactive-tempated grain growth (RTGG) method, using platelike Ba_6Ti_<17>O_<40> (B6T17) and Bi_4Ti_3O_<12> (BiT) particles as reactive-templates for <111>-and <100>-orientation, respectively. These particles were mixed with BaCO_3 powder, and tape-cast to prepare green compacts with the aligned platelike particles. Calcination of these compacts in air and vacuum for <111>-and <100>-orientation, respectively, formed oriented BaTiO_3 particles. Textured ceramics were obtained by sintering the calcined compacts between 1300゜ and 1400℃, but the sintered densities were between 8O and 90% of theoretical. Large voids formed between platelike particles in the green compacts grew to large elongated pores during sintering, and these pores could not be eliminated. To fill the large voids, BaTiO_3 powders with the average particle size between 0.1 and 0.5 μm were added as filler, and the sintered density increased up to 95 and 99%. The efficiency of increasing density was dependent on the particle size. The filler had no deteriorated effect on the texture formation. Thus, dense, highly-textured BaTiO_3 ceramics were prepared, and the effects of processing parameters on the density and orientation were examined.

以<111><100>片状Ba_6Ti_<17>O_<40>（B6 T17）和Bi_4Ti_3O_<12>（BiT）颗粒分别作为<111>-和<100>-取向的反应模板，采用反应温度晶粒生长（RTGG）法制备了具有-和-取向的晶体织构BaTiO_3。将这些颗粒与BaCO_3粉末混合，并流延以制备具有定向片状颗粒的绿色压坯。在空气和真空中分别进行煅烧<111><100>，得到取向的BaTiO_3颗粒.在1300 ℃ ~ 1400℃烧结，可获得织构陶瓷，但烧结密度为理论密度的80 ~ 90%。在烧结过程中，绿色压坯中的板状颗粒之间形成的大空隙生长成大的细长孔，并且这些孔不能被消除。为了填充大孔隙，加入平均粒径为0.1 ~ 0.5 μm的BaTiO_3粉末作为填料，烧结密度分别提高到95%和99%。增密效果与颗粒大小有关。填料对织构的形成没有不良影响。在此基础上，制备了致密、高织构的BaTiO_3陶瓷，并研究了工艺参数对陶瓷致密度和取向的影响。

项目成果

T.Sugawara, M.Shimizu, T.Kimura, K.Takatori, T.Tani: "Fabrication of Grain Oriented Barium Titanate"Ceramic Transaction. 136. 389-406 (2003)

T.Sukawara、M.Shimizu、T.Kimura、K.Takatori、T.Tani：“晶粒取向钛酸钡的制造”陶瓷交易。

T.Kimura, Y.Miura, H.Muramatsu: "Mechanisms of Texture Formation in Ferroelectric Ceramics Made by Templated Grain Growth Method"Extended Abstract in 11^<th> US-Japan Seminar on Dielectrics and Ferroelectric Ceramics. 347-350 (2003)

T.Kimura、Y.Miura、H.Muramatsu：“模板晶粒生长法制造的铁电陶瓷中织构形成的机制”第11届美日电介质和铁电陶瓷研讨会的扩展摘要。

T.Kimura, Y.Miura, H.Muramatsu: "Mechanisms of Texture Formation in Ferroelectric Ceramics made by Templated Grain Growth Method"Extended Abstract in 11th Us-Japan Seminar on Dielectrics and Ferroelectrics. 347-350 (2003)

T.Kimura、Y.Miura、H.Muramatsu：“模板晶粒生长法制造的铁电陶瓷中织构形成的机制”第11届美日电介质和铁电体研讨会的扩展摘要。

T.Sugawara, M.Shimizu, T.Kimura, K.Takatori, T.Tani: "Fabrication of Grain Oriented Barium Titanate"Ceramic Transactions. 136. 389-406 (2003)

T.Sukawara、M.Shimizu、T.Kimura、K.Takatori、T.Tani：“晶粒取向钛酸钡的制造”陶瓷交易。

T.Kimura, Y.Miura, M.Muramatsu: "Mechanisms of Texture Formation in Ferroelectric Ceramics made by Template Glain Growth Method"Extended Abstract in 11th US-Japan Seminar on Dielectric and Ferroelectrics.

T.Kimura、Y.Miura、M.Muramatsu：“模板晶粒生长法制造的铁电陶瓷中织构形成的机制”第11届美日电介质和铁电体研讨会的扩展摘要。