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Bismuth vanadate functional ceramics and preparation method thereof

A technology of functional ceramics and bismuth vanadate, which is applied in the field of bismuth vanadate functional ceramics and its preparation, can solve the problem that bismuth vanadate is difficult to sinter into ceramics, etc., achieve high density, inhibit volatilization, ensure conversion rate and production efficiency. Effect

Active Publication Date: 2015-11-18
CHEM & CHEM ENG GUANGDONG LAB
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the problem that bismuth vanadate is difficult to sinter into porcelain, and provide a bismuth vanadate functional ceramic and its preparation method

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  • Bismuth vanadate functional ceramics and preparation method thereof
  • Bismuth vanadate functional ceramics and preparation method thereof
  • Bismuth vanadate functional ceramics and preparation method thereof

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Embodiment Construction

[0021] A kind of bismuth vanadate functional ceramics, its chemical composition is BiVO 4 , The density is over 97%, the dielectric constant is 60, and the dielectric loss is <0.005. The ceramic has physical properties such as ion conductivity, ferroelasticity, and photochromic change, and has good dielectric properties, and is an ideal functional material.

[0022] The preparation method of described bismuth vanadate functional ceramics is, with Bi 2 o 3 and V 2 o 5 Powder as raw material, Bi 2 o 3 and V 2 o 5 After the powder is mixed according to the molar ratio of 1:1, it is mixed and put into the grinding equipment, and it is manually ground for 5 hours. When grinding, absolute ethanol is used as a solvent to keep the particles uniform and not to generate powder dust. The amount of water ethanol is about 5% of the powder mass. It is guaranteed that it can be volatilized completely after grinding and will not remain in the powder. Dry the ground powder and press ...

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Abstract

The invention relates to a bismuth vanadate functional ceramic and a preparation method thereof. For the bismuth vanadate functional ceramic, the chemical component is BiVO4, the compactness is more than 97%, the dielectric constant is 60 and the dielectric loss is less than 0.005. The preparation method of the bismuth vanadate functional ceramic comprises the following steps: by taking Bi2O3 and V2O5 powder as raw materials, mixing and preforming the raw materials, putting in a closed mold, and carrying out primary sintering; after sintering is completed, grinding into powder and preforming again; then putting into the closed mold again and carrying out secondary sintering; after the sintering is completed, controlling the cooling speed to be less than or equal to 3.3 DEG C / min, and cooling to room temperature so as to obtain the bismuth vanadate functional ceramic.

Description

technical field [0001] The invention belongs to the field of functional ceramic materials, and in particular relates to a bismuth vanadate functional ceramic and a preparation method thereof. Background technique [0002] Functional materials are the core of the field of new materials, and play an important role in promoting and supporting the development of high-tech. In the field of new materials in the world, functional materials account for about 85%. Functional ceramic materials are an important part of functional materials and have many excellent properties, which are highly valued by the scientific and technological circles and business circles. [0003] Bismuth vanadate (referred to as 184 yellow) is an important inorganic yellow pigment with the characteristics of non-toxicity, bright color and stable chemical properties. Bismuth vanadate is a semiconductor material with a narrow band gap ( E g =2.4eV), which has good oxygen production activity under visible lig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/495C04B35/622
Inventor 李国岭李海生王赵武曹京晓王丹丹马海祥刘书丽孙广宇郜元煜郑博含黄海明臧国忠李立本
Owner CHEM & CHEM ENG GUANGDONG LAB
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