| 摘要 |
PROBLEM TO BE SOLVED: To form a thin film having oriented crystal axis of titanium oxide or a metal titanate compound on a various substrate by a simple process. SOLUTION: A method of forming the thin film having an oriented crystal axis comprises a process for obtaining a layered titanic acid in which 90 to 100% of A and/or M ions, wherein A and M are different to each other and are each a monovalent to trivalent metal, are substituted with hydrogen ions by acid treating a layered titanate expressed by general formula: Ax My Dz Ti2-(y+z) O4 , wherein; D means the defect part of Ti; x is a positive real number and is >0 and <1.0; y and z are each a positive real number satisfying the formula: 0<y+z<1.0, a process for obtaining a suspension containing flaky titanic acid separated between layers by allowing a basic compound to act to a slurry of the layered titanic acid, a process for forming a thin film on a substrate by coating the substrate with the suspension containing the flaky titanic acid and drying the coated suspension, and a process for subjecting the thin film formed on the substrate to hydrothermal treatment to obtain a thin film of titanium oxide.
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