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Method for producing electric-melting zirconia used for turquoise pigment and glaze

A vanadium zirconium blue glaze, fused zirconia technology, applied in zirconia, grain processing and other directions, can solve the problems of diluted color, unreasonable particle size distribution, poor color development effect, etc. Aesthetics, the effect of enhancing blueness

Active Publication Date: 2010-05-12
BENGBU ZHONGHENG NEW MATERIALS SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Vanadium-zirconium blue has very strict requirements on the particle size of zirconia. The main problem of fused zirconium for vanadium-zirconium blue currently used in the market is that the particle size distribution is unreasonable, D10 and D50 are too low, and D98 is too high, so the entire particle size The distribution is relatively wide, and the particle size components that really play a role in the firing of the colorant account for only a small part of it, and the rest of the lighter-colored part dilutes the color of the colorant produced by this part, resulting in poor overall coloring effect

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] a. The feed particle size D50 of zirconia is controlled at 24.5 μm;

[0016] b. Send zirconia into the jet mill, control the working air pressure of the jet mill nozzle at 0.8Mpa, and adjust the frequency of the cyclone to 45;

[0017] c. The classifier is adjusted to 18 frequencies, and the particle size distribution of zirconia powder is strictly controlled. During the airflow classification and crushing process, the particle size distribution of zirconia powder is strictly controlled, so that D10 is not less than 3μm, D50 is kept at 14-15μm, and D90 The difference from D10 does not exceed 30μm. The zirconia after particle size optimization is made into vanadium blue, the a value and b value are significantly improved, and the high temperature stability is greatly enhanced, which is better than zirconia powder in other particle size bands.

Embodiment 2

[0019] a. The feed particle size D50 of zirconia is controlled at 22.5 μm;

[0020] b. Send zirconia into the jet mill, control the working air pressure of the jet mill nozzle at 0.75Mpa, and adjust the cyclone to 42 frequencies;

[0021] c. The classifier is adjusted to 16 frequencies, and the particle size distribution of the zirconia powder is strictly controlled during the airflow classification and crushing process, so that D10 is kept at 3.3 μm, D50 is kept at 14.5 μm, D90 is kept at 30.5 μm, and D98 is kept at 41.8 μm. The particle size value fluctuates no more than 0.3 μm. The zirconia with this particle size curve is tested to have the best color development effect among the samples in the particle size band described in Example 1.

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Abstract

The invention relates to a method for producing electric-melting zirconia used for turquoise pigment and glaze, which is characterized in that: in a process of fine crushing, a feed particle size D50 is controlled between 20 and 25mu m, the working air pressure of a nozzle of a jet mill is 0.8MPa, a cyclonecluster is adjusted to 45Hz, a grader is adjusted to 18Hz, and the size distribution after the crushing meets the conditions that: D10 is not less than 3mu m, D50 is kept between 14 and 15mu m, and the difference between D90 and D10 is not more than 30mu m. The method has the advantages that: the narrow size distribution range of zirconia powder is realized, and reasonable grain size distribution is realized; and the electric-melting zirconia is favorable for color development of the turquoise pigment and glaze compared with the traditional electric-melting zirconia, comprehensively improves the blue degree of corresponding pigment and glaze, reduces a brightness value, makes the pigment develop more bright and vivid color in the glaze, and improves the beautifulness of corresponding ceramic products. The electric-melting zirconia after reasonable particle size control and adjustment can improve the high temperature resistance of the turquoise pigment and glaze more obviously than the electric-melting zirconia which is not controlled, and still can keep bright tone at the temperature higher than 1,200DEG C so as to promote the application to high temperature pigments.

Description

Technical field [0001] The invention belongs to the technical field of ceramic pigments, in particular to high-purity fused zirconia used in vanadium-zirconium blue ceramic pigments. Background technique [0002] Zirconium-based ceramic pigments have excellent properties of bright color and good miscibility, so they occupy an important position in the commonly used ceramic glaze and blank colorants. Among them, the most common and the most used are the three primary colors of the zirconium system: vanadium-zirconium blue, zirconium The main crystal phase of praseodymium yellow and zircon iron red is zirconium silicate, which is formed by zirconia and quartz at high temperature. Therefore, the physical and chemical properties of zirconia, including chemical activity, microstructure, and powder particle size distribution, have a direct impact on the color development and high temperature stability of the entire ceramic pigment. [0003] Vanadium-zirconium blue has very strict...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B02C19/06C01G25/02
Inventor 彭寿王永和董树人刘强
Owner BENGBU ZHONGHENG NEW MATERIALS SCI & TECH CO LTD
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