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

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...

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