Method for producing electric-melting zirconia used for yellow zirconium praseodymium glaze

A technology of fused zirconia and a production method, which is applied to zirconia, grain processing and other directions, can solve the problems of low color development effect, low particle size ratio and instability of zirconium praseodymium yellow material, so as to improve the color development effect, improve the development of Vibrant colors, enhanced redness and yellowness effects

Active Publication Date: 2010-04-21
BENGBU ZHONGHENG NEW MATERIALS SCI & TECH CO LTD
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  • Summary
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  • Application Information

AI Technical Summary

Problems solved by technology

However, an important problem in the current fused zirconia is that there is no reasonable particle size distribution range and particle size gradation. The formation speed of the zircon crystal lattice is inconsistent with the speed at which the chromogenic ions enter the lattice. The current fused zirconia on the market Most of the particle size distribution is too wide, and the effective particle size ratio is low when forming the color material, which leads to the low color development effect of the corresponding zirconium-praseodymium yellow material and is unstable

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 0.7Mpa, and adjust the cyclone to 40 frequency;

[0017] c. The classifier is adjusted to 35 frequency, strictly control the particle size distribution of zirconia powder, and strictly control the particle size distribution of zirconia powder during the airflow classification and crushing process, so that D10 is not less than 1.5 μm, and D50 is kept at 6 ~ 6.5 μm , The difference between D90 and D10 does not exceed 8μm. The zirconia after particle size optimization is made into praseodymium yellow, the redness and yellowness 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 38 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 1.7 μm, D50 is kept at 6.1 μm, D90 is kept at 9 μm, and D98 is kept at 12.5 μm. Values ​​fluctuate no more than 0.1 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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PUM

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Abstract

The invention relates to a method for producing electric-melting zirconia used for a yellow zirconium praseodymium glaze, which is characterized in that: in the fine crushing process, the feed particle size D50 is controlled in the range of 20 to 25 mu m, the working air pressure of a nozzle of an airflow mill is 0.7 Mpa, a cyclone cluster is regulated to 40 frequency, and a grader is regulated to 35 frequency; and after the crushing, the powder particle size distribution meets D10 which is not less than 1.5 mu m, D50 is maintained in the range of 6 to 6.5 mu m, and the difference between D90 and D10 is not more than 8 mu m. The method has the advantages of realizing narrow range of particle size distribution and reasonable grain size distribution of the zirconia powder, making the proportion of effective particles favorable for high-temperature chemical reaction in the zirconia powder increased, comprehensively improving the degree of red color and the degree of yellow color of corresponding coloring materials and reducing brightness value to make the coloring materials brighter and lively in the glaze, and improving the beauty degree of corresponding ceramic products.

Description

Technical field [0001] The invention belongs to the technical field of ceramic pigments, in particular to high-purity fused zirconia used in zirconium-praseodymium yellow 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] Fused zirconia, which is commonly...

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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