Low cost low expansion ceramic zirconium-free white glaze and preparation method thereof

Abstract

The invention discloses a low cost low expansion ceramic zirconium-free white glaze, which comprises a basic material and additives. The basic material is composed of the following raw materials in percentage by weight: 20 to 35 wt% of spodumene, 10 to 25 wt% of petalite, 10 to 15 wt% of calcined talcum, 7 to 10 wt% of barium carbonate, 6 to 10 wt% of magnesite clay, 1 to 3 wt% of strontium carbonate, 10 to 20 wt% of quartz, 1 to 5 wt% of lithium containing porcelain stone, 6 to 12 wt% of alumina micro powder, and 0 to 3 wt% of bone ash. The additives are hydroxypropyl methyl cellulose and sodium tripolyphosphate; wherein hydroxypropyl methyl cellulose accounts for 0.05 to 0.1 wt% of the basic material and sodium tripolyphosphate accounts for 0.20 to 0.30 wt% of the basic material. Furthermore, the invention also discloses a preparation method of the low cost low expansion ceramic zirconium-free white glaze. The low cost low expansion ceramic zirconium-free white glaze has the advantages of low production cost, safe application, no radiation, high whiteness, good melting performance, and adjustable expansion coefficient; can well meet the use requirements of various low expansion ceramic blanks, and is beneficial for the development of low expansion ceramic industry.

Description

technical field [0001] The invention relates to the technical field of ceramic glaze, in particular to a low-expansion ceramic white glaze and a preparation method thereof. Background technique [0002] As health cookware, low expansion ceramic cookware is more and more favored by consumers. At present, the output of low-expansion ceramic cookware in my country is about 200,000 pieces / day, of which white glaze porcelain accounts for more than 50%. However, most of the white glazes in the prior art are zirconium-containing glazes, which contain 10-16% of zircon sand or zircon, and zircon or zircon sand contains radioactive element hafnium. Glaze imposes radioactive requirements, which are becoming more and more stringent. For this reason, most of the current research and enterprises have begun to reduce the use of zircon or zircon sand, but this has caused the whiteness to fail to meet the requirements, not only the color is yellow, but also the temperature fluctuation is l...

AI Technical Summary

Problems solved by technology

For this reason, most of the current research and enterprises have begun to reduce the use of zircon or zircon sand, but this has caused the whiteness to fail to meet the requirements, not only the color is yellowish, but also the temperature fluctuates greatly and is unstable, and the product is qualified. The rate is low and the cost is high, which greatly reduces the competitiveness of enterprises

In addition, there are still problems such as narrow melting temperature range of white glaze, mismatched ceramic body glaze, easy cracking, and many waste products.

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