Ceramic glaze common opacifying agent

At present, the domestic enterprise specializing in ceramic glaze with zirconium silicate is not much more special. Of zirconium silicate in the ceramic glaze not only have the effect of opacifying whitening, and can improve billet glaze, increase the water resistance, wear resistance and hardness of the glaze, is essential for manufacturing high-grade easy clean huo ceramics.


Zirconium silicate as opacifying agent also has rich raw material source, processing technology mature, cost-effective, green environmental protection and other characteristics, can satisfy the demand for various levels of zirconium silicate ceramic industry.


Because of ceramic glaze frit is not to be used in so they are limited to the highest firing temperature greater than 1150 ℃. Usually can be used as production hard-paste porcelain, vitrified sanitary porcelain, stoneware, porcelain and all kinds of low expansion body glazing. Raw glaze contains mineral solvent, such as feldspar and nepheline syenite, plus clay, silica, calcium carbonate, dolomite, zinc oxide and zirconium silicate is commonly used as a raw material. Low expansion raw glaze also use petalite as flux.


Opacified glaze for ceramics in the modern ceramic industry（Ceramic Colors ceramic tile color）, including daily-use ceramics, building ceramics, sanitary ware and so on various aspects have a wide range of applications. Opacified glaze is opacifying agent in transparent glaze, glaze is produced in tiny crystals, bubble or liquation phenomena and so on, to light scattering effect, and get the opaque opacified glaze. Opacifying agent is the most critical opacified glaze composition. In the modern ceramic industry common opacifying agent mainly include: zirconium silicate (ZrSiO4), zirconia (ZrO2), titanium oxide (TiO2), tin (SnO2) oxide and cerium oxide (CeO2), antimony pentoxide (Sb2O5), zinc oxide (ZnO), alumina (Al2O3), lithium mineral, containing phosphate rock, fluoride, etc. This article from the composition, characteristics, function and application scope of every kind of a brief introduction to the opacifying agent.


ceramic pigment In the daily-use ceramics and building ceramics is the most common opacifying agent zirconium silicate. Zirconium silicate, the formula for the ZrSiO4 is zircon sand, zircon) as raw material, after in addition to the impurities such as iron, titanium, monazite, superfine grinding and surface modification process. Zircon sand, zircon) is a kind of deep magmatic mineral, for zirconium silicate. Its theoretical composition of ZrSiO4:67.2%, SiO2:32.8%, and contains a small amount of ferric oxide, titanium oxide and other small amounts of impurities.


Zirconium silicate opacifying effect is very stable, and is not affected by the firing atmosphere. Studies have shown that zirconium silicate in the opacifying frits effect is better than in a raw form to join the glaze is because the precipitation from the melt zirconium silicate grain residue zirconium silicate particles smaller, more close to the wavelength of visible light, and thus high turbidity. For zirconium silicate opacifying effect influence the biggest reason is that the grain fineness, particle, the more fine, opacifying effect is better.