Preparation and Evolution of Functional Double Oxide Thin Films by Hydrothermal Electrochemical Methods

水热电化学法制备和演化功能性双氧化物薄膜

• 批准号: 03403014
• 负责人: YOSHIMURA Masahiro
• 金额: $ 11.58万
• 依托单位: Tokyo Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (A)
• 财政年份: 1991
• 资助国家: 日本
• 起止时间: 1991 至 1992
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-03403014/
• 关键词: Hydrothermal Electro-Chemical Method; Hydrothermal; Functional Double Oxide; Thin Film; Supercritical Fluid; Barium Titanate; Lead Titanate; Calcium Titanate; 水熱電気化学法; 水熱法; 機能性複合酸化物薄膜; その場作製; 複合酸化物

Hydrothermal synthesis, where high pressure and high temperature aqueous solutions are reactive solvents or reagents, has been applied to ceramics: inorganic compounds and/or their composites. In particular,in the present study, functional double oxides such perovskite-type oxides as BaTiO_3 could be prepared as thin films on Ti metal substrate through in sim reactions between the substrate and the solvent at relatively low temperatures of 120-200ﾟC under saturation vapor pressure of 0.2-2 MPa for 1 h. PbTiO_3,SrTiO_3 and CaTiO_3 also could be prepared as films by this method. Similarly, BaNbO_3,LiNbO_3 and Ba_5Nb_4O_<15> on Nb substrate, and LiTaO_3 on ta substrate have been synthesized. Polycrystalline tetragonal BaTiO_3 films were prepared on Ti substrate at 400-700ﾟC under hydrothermal conditions. Epitaxial growth of BaTiO_3 on SrTiO_3 substrate has been succeeded. These products were confirmed through X-ray diffraction, scanning electron microscope and/or Raman spectroscopy. Alkaline earth titanate films could be prepared on TiAl that is expected as one of future high temperature materials if appropriate anti-oxidative coating could be prepared on the TiAl substrate. It was observed that CaTiO_3 films could retard the oxidation of TiAl by cyclic heating at 900ﾟC in air.

水热合成，其中高压和高温水溶液是反应性溶剂或试剂，已被应用于陶瓷：无机化合物和/或其复合材料。特别是在本研究中，通过在120-200 ℃、0.2-2 MPa的饱和蒸汽压下，在Ti金属基体上与溶剂进行原位反应1 h，可以在Ti金属基体上制备出BaTiO_3等钙钛矿型功能复合氧化物薄膜。PbTiO_3、SrTiO_3和CaTiO_3也可通过该方法制备成薄膜。在Nb衬底上合成了BaNbO_3，LiNbO_3和Ba_5Nb_4O_3<15>，在Ta衬底上合成了LiTaO_3。在400-700 ℃的水热条件下，在Ti衬底上制备了四方BaTiO_3多晶薄膜。成功地在SrTiO_3衬底上外延生长了BaTiO_3。通过X射线衍射、扫描电子显微镜和/或拉曼光谱证实了这些产物。如果在TiAl基体上制备合适的抗氧化涂层，可以在有望成为未来高温材料之一的TiAl基体上制备碱土钛酸盐薄膜。CaTiO_3薄膜在空气中900 ℃循环加热时可有效地抑制TiAl的氧化。

项目成果

K.Kajiyoshi,N.Ishizawa,and M.Yoshimura: "¨Heteroepitaxial Growth of BaTiO_3 Thin Films on SrTiO_3 Substrate under Hydrothermal Conditoins¨" Jpn.J.Appl.Phys.30[1B]. L120-L123 (1991)

K. Kajiyoshi、N. Ishizawa 和 M. Yoshimura：“水热条件下 SrTiO_3 基底上 BaTiO_3 薄膜的异质外延生长”Jpn.J.Appl.Phys.30[1B] (1991)。

S-E.Yoo,N.Ishizawa,M.Hayashi,and M.Yoshimura: "¨Review on Preparation of Films of Functional Complex Oxide by Hydrothermal-Electrocchemical method¨" Rept.Res.Lab.Eng.Mater.,Tokyo Inst.Tech.No.16. 39-53 (1991)

S-E.Yoo、N.Ishizawa、M.Hayashi 和 M.Yoshimura：“通过水热电化学方法制备功能性复合氧化物薄膜的综述”Rept.Res.Lab.Eng.Mater.，东京工业大学.16号39-53（1991）

K.Kajiyoshi,N.Ishizawa,and M.Yoshimura: "¨Preparation of Tetragonal BaTiO_3 Thin Film on Ti Metal Substrate by Hydrothermal Method¨" J.Am.Cer.Soc.74[2]. 369-374 (1991)

K. Kajiyoshi、N. Ishizawa 和 M. Yoshimura：“通过水热法在钛金属基底上制备四方 BaTiO_3 薄膜” J.Am.Cer.Soc.74[2]（1991）。

石澤 伸夫,吉村 昌弘: "「水熱電気化学法によるチタン酸バリウム等の複合酸化物薄膜の合成」" 機能材料. 10[11]. 34-41 (1991)

Nobuo Ishizawa，Masahiro Yoshimura：“水热电化学法合成钛酸钡等复合氧化物薄膜”10[11]（1991）。

K.Kajiyoshi,N.Ishizawa,and M.Yoshimura: "Heteroepitaxial Growth of BaTiO_3 Thin Films on SrTiO_3 Substrate under Hydrothermal Conditions" Jpn.J.Appl.Phys. 30(1B). L120-L123 (1991)

K.Kajiyoshi、N.Ishizawa 和 M.Yoshimura：“水热条件下 SrTiO_3 基板上 BaTiO_3 薄膜的异质外延生长”Jpn.J.Appl.Phys。