Method for preparing bismuth vanadate functional ceramic and obtained bismuth vanadate functional ceramic

A technology of functional ceramics and bismuth vanadate, applied in the field of functional ceramic materials, can solve the problem that bismuth vanadate is difficult to sinter into porcelain, and achieve the effects of ensuring high density, conversion rate, production efficiency, and high density

Active Publication Date: 2014-10-22
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 method for preparing bismuth vanadate functional ceramics and the prepared bismuth vanadate functional ceramics

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  • Method for preparing bismuth vanadate functional ceramic and obtained bismuth vanadate functional ceramic
  • Method for preparing bismuth vanadate functional ceramic and obtained bismuth vanadate functional ceramic
  • Method for preparing bismuth vanadate functional ceramic and obtained bismuth vanadate functional ceramic

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Embodiment Construction

[0020] The present invention prepares the method for bismuth vanadate functional ceramics, 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 it into tablets; put the tablets into the quartz mold, and seal the quartz mold to prevent the volatilization of the ingredients. In order to avoid the volatilization of the ingredients in the subsequent firing process, the quartz mold , the smaller the remaining space, the better. The volume of the quartz mold should be just enough to hold the tablet; pu...

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Abstract

The invention discloses a method for preparing a bismuth vanadate functional ceramic and the obtained bismuth vanadate functional ceramic. The method comprises the following steps: by adopting Bi2O3 and V2O5 as raw materials, mixing the Bi2O3 and the V2O5 powders in the molar ratio of 1 to 1 and grinding for 5 hours by adopting absolute ethyl alcohol as a solvent, volatilizing the solvent out, pressing into pieces, putting the pieces into a quartz mould, sealing the quartz mould to inhibit the volatilization of components, putting the sealed quartz mould into a muffle furnace to carry out primary firing, grinding into powder after the firing is completed, pressing into pieces again, putting the pieces into the sealed quartz mould again to carry out secondary firing, controlling the cooling rate to be not more than 3.3 DEG C / min after the firing is finished, and cooling to room temperature to obtain the bismuth vanadate functional ceramic. The obtained bismuth vanadate functional ceramic has the characteristics that the chemical component is BiVO4; the density is above 97%; the dielectric constant is 60 and the dielectric loss is less than 0.005.

Description

technical field [0001] The invention belongs to the field of functional ceramic materials, and in particular relates to a method for preparing bismuth vanadate functional ceramics and the prepared bismuth vanadate functional ceramics. 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 = 2.4 eV), which has goo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/495C04B35/64
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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