JP2012102001A5 - - Google Patents

Claims (18)

An aqueous titanium solution comprising titanium and a metal element,
A coordination number with respect to the titanium ion is 6, represented by the following general formula (1), and a first ligand that functions as a bidentate ligand;
Z ₁ —CO—CH ₂ —CO—Z ₂ (1)
(In the formula, Z ₁ and Z ₂ are each independently an alkyl group or an alkoxy group.)
A second ligand which is a carboxylate, a third ligand and a fourth ligand each independently selected from the group consisting of alkoxides and hydroxide ions, and H ₂ O. A fifth complex formed by coordination with a titanium ion;
A metal ion capable of occupying the A site in the perovskite-type titanium oxide;
Water as solvent,
A titanium aqueous solution characterized by comprising at least   2. The titanium aqueous solution according to claim 1, wherein the metal ion capable of occupying the A site in the perovskite-type titanium oxide is a metal element ion selected from the group consisting of Ca, Sr, Ba and Pb.   The titanium aqueous solution according to claim 1 or 2, which is used for producing a perovskite-type titanium oxide film. The titanium aqueous solution according to any one of claims 1 to 3, wherein Z ₁ and Z ₂ are a C _1-6 alkyl group or a C _1-6 alkoxy group. The carboxylate as the second ligand is a group represented by the formula R ¹ —COO ⁻ (wherein R ¹ is a C _1-4 alkyl group), or has 1 to 6 carbon atoms. The aqueous titanium solution according to any one of claims 1 to 4, which is a conjugate base of hydroxy acid or dicarboxylic acid. The third or alkoxide is a fourth ligand, wherein ^R 2 -O ^- (wherein, ^{R 2} is _{C 1-6} alkyl group) is a group represented by the claims 1 to 5 The titanium aqueous solution as described in any one.   The aqueous titanium solution according to any one of claims 1 to 6, wherein the first ligand is acetylacetonate or ethyl acetoacetate.   The second ligand is a conjugate base of a carboxylic acid selected from acetic acid, propionic acid, butyric acid, lactic acid, tartaric acid, oxalic acid, and citric acid, according to any one of claims 1 to 7. Titanium aqueous solution.   The titanium aqueous solution according to any one of claims 1 to 8, wherein the second ligand is an acetate ion which is a conjugate base of acetic acid.   The titanium aqueous solution according to any one of claims 1 to 9, wherein the third ligand and the fourth ligand are isopropoxy groups.   The titanium aqueous solution according to any one of claims 1 to 10, further comprising a second solvent that has a relative dielectric constant lower than that of water, is compatible with water, and is non-alkaline.   The second solvent according to claim 11, wherein the second solvent is at least one selected from the group consisting of a monohydric alcohol, a glycol solvent, an ethylene glycol solvent, a glycerin solvent, a cellosolve solvent, and a carbitol solvent. Titanium aqueous solution. The aqueous titanium solution according to claim 12, wherein the second solvent is selected from the group consisting of methanol, ethanol, propanol, and butanol. It is a manufacturing method of the titanium aqueous solution as described in any one of Claims 1-13,
A titanium precursor and a compound represented by the general formula (1) are mixed to obtain a titanium-acetylacetone complex, and this solution is mixed with an aqueous solution containing carboxylate ions. Further, the obtained solution and an alkali are mixed. After mixing with an aqueous solution containing an earth metal ion, at least comprising mixing a non-alkaline second solvent having a relative dielectric constant lower than that of water and being compatible with water, in some cases. A manufacturing method.   The manufacturing method according to claim 14, wherein the titanium complex is titanium alkoxide or titanium tetrachloride. A method for producing a perovskite oxide film comprising titanium and an alkaline earth metal,
On the base material, the titanium aqueous solution according to claim 1 to 13 is applied,
A production method comprising a step of firing the base material to form a film.   The production according to claim 16, wherein the substrate has an amorphous glass layer on at least a surface thereof, an aqueous titanium solution is applied to the amorphous glass layer, and a perovskite type titanium oxide is formed on the layer. Method. A member obtained by the production method according to claim 17, wherein a film made of a perovskite titanium oxide is directly formed on a glass substrate,
The glass substrate contains at least alkali ions in the vicinity of the surface on which the film is formed,
The film comprising the perovskite-type titanium oxide is a dense film having a primary particle diameter of 50 nm or less and a perovskite-type oxide.