A kind of preparation method of yttrium stannate spherical grade structure material

Abstract

The invention belongs to the field of inorganic nonmetal material preparation, and particularly relates to a preparation method of an yttrium stannate spherical hierarchical structure material. The method comprises the steps that after yttrium(III) 2,4-pentanedionate hydrate and tin tetrachloride are sufficiently dissolved in a methanol solution, a solvothermal reaction is conducted, after filtration and washing are conducted, drying and calcination cooling are conducted, and the yttrium stannate spherical hierarchical structure material is obtained. The molar ratio of yttrium(III) 2,4-pentanedionate hydrate to tin tetrachloride is 1:1; the molar concentration of yttrium(III) 2,4-pentanedionate hydrate ranges from 0.01 mol / L to 0.2 mol / L. The technology is simple and convenient and easy to implement, the product is high in purity, the preparation cost is low, the size of the whole large ball of the obtained product ranges from 5 mm to 8 mm, and the sizes of the nano particles range from 10 nm to 20 nm. The homogeneity and dispersibility of the product are very good, the production technology is simple, the calcination temperature is low, and the method is likely to be applied to actual large-scale production.

Description

technical field [0001] The invention belongs to the technical field of preparation of inorganic non-metallic materials, and in particular relates to a preparation method of a spherical grade structure material of yttrium stannate. Background technique [0002] The chemical structure of pyrochlore oxide is A 2 B 2 o 7 , where A and B are metals. The pyrochlore structure contains two different metal cation coordination polyhedra. The metal ion with a larger ionic radius occupies the A site to form an octahedral coordination, and the metal ion with a smaller ionic radius occupies the B site to form a tetrahedral coordination. The coordination polyhedron interpenetrates to form A 2 B 2 o 7 crystal structure. Because the ratio of A-site atoms and B-site atoms' radii can vary within a certain range, pyrochlore-structured compounds have excellent optical, electromagnetic and other physical properties, and have become the most active research objects in the field of nanomater...

AI Technical Summary

Problems solved by technology

The traditional high-temperature solid-phase synthesis method not only wastes resources, but also has disadvantages such as impurity and large size of the product.

Co-precipitation method is easy to produce heterogeneous phases, and the specific surface area is small, which affects its performance as a catalyst or catalyst carrier

In the co-precipitation preparation process, a large amount of precipitant is used, which increases the preparation cost, and the prepared yttrium stannate is not high in purity, resulting in defects such as low density and poor strength.

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