Preparation method of high-density bismuth vanadate ceramic
A technology of density bismuth vanadate and bismuth vanadate, which is applied in the field of functional ceramic materials, can solve the problem that bismuth vanadate is difficult to sinter into ceramics, etc., achieve high density, ensure conversion rate and production efficiency, and inhibit volatilization.
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[0021] The high-density bismuth vanadate ceramic of the present invention uses Bi 2 O 3 And V 2 O 5 The powder is the raw material and is made by firing twice, and can be specifically prepared by the following steps.
[0022] Step 1: Put Bi 2 O 3 And V 2 O 5 The powder is mixed according to the molar ratio of 1:1 and then mixed and loaded into the grinding equipment. It is manually grinded for 5 hours. When grinding, absolute ethanol is used as the solvent to keep the particles uniform and not produce powder dust. The added water is anhydrous The amount of ethanol is about 5% of the powder mass. Ensure that the volatilization is completed after grinding and will not remain in the powder. The ground powder is dried and pressed into tablets.
[0023] Step 2. Put the pressed tablet into a sealed quartz mold, put it in the muffle furnace and pre-fire at 890 ℃ for 12 hours, and then naturally anneal to cool down; in order to avoid the volatilization of the components, the quartz mold i...
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