Modified perovskite type composite oxide, method for preparing the same, and composite dielectric material
AssigneeNippon Chemical Industrial Co., Ltd.
InventorShinji Tanabe
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Abstract
The invention provides a modified perovskite type composite oxide in which the particle surface of a perovskite type composite oxide is coated with a first component of at least one selected from TiO2 and SiO2 and a second component of at least one selected from a group consisting of Al, Zr, Nd, La, Ce, Pr, and Sm, wherein the coating is formed by hydrolyzing at least one selected from a hydrolyzable TiO2 precursor and a hydrolyzable SiO2 precursor as a source of the first component and a salt of at least one selected from a group consisting of Al, Zr, Nd, La, Ce, Pr, and Sm as a source of the second component, and then calcining them.
Claims20
A modified perovskite type composite oxide in which a particle surface of a perovskite type composite oxide is coated with a first component of at least one selected from TiO2 and SiO2, and a second component of at least one selected from a group consisting of Al, Zr, Nd, La, Ce, Pr, and Sm,
- wherein a coating is formed by hydrolyzing at least one selected from a hydrolyzable TiO2 precursor and a hydrolyzable SiO2 precursor as a source of the first component and a salt of at least one selected from a group consisting of Al, Zr, Nd, La, Ce, Pr, and Sm as a source of the second component, and then calcining them.
A method for preparing the modified perovskite type composite oxide, comprising:
- (A1) a step of dispersing perovskite type composite oxide particles in a solvent to prepare a slurry;
- (A2) a step of adding a source of a first component of at least one selected from a hydrolyzable TiO2 precursor and a hydrolyzable SiO2 precursor and a salt of a source of a second component of at least one selected from a group consisting of Al, Zr, Nd, La, Ce, Pr, and Sm to the slurry obtained in (A1), carrying out a hydrolysis reaction of the precursor(s) and the salt in the presence of a catalyst, and then drying the slurry;
- and
- (A3) a step of calcining the dried product obtained in (A2).
Dependencies are inferred from the claim text.