Lead- and zinc-free transparent fritted glaze

A technology of transparent frit and rare earth elements, applied in the field of lead-free and zinc-free frit glaze, can solve the problems of harmful physical and mental health of users, insufficient fluidity of glaze at high temperature, difficult to control production process, etc. Vibrant color and good gloss effect

Inactive Publication Date: 2003-10-29
JIANGSU BAIFU TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The glaze with lead as the main component has the advantages of excellent melting performance, high refractive index, good glaze gloss, and wide firing range. However, lead is easy to precipitate during use of lead glaze products, which is harmful to the physical and mental health of users. At present, there are many lead-free glazes on the market. The shortcomings are: 1. The color of the underglaze color is not bright, and the transparency of the glaze is poor; 2. The high-temperature fluidity of the glaze is not enough. Defects; 3. The firing range is narrow and the production process is difficult to control
Chinese patent 99120405 discloses "advanced daily-use porcelain lead-free frit glaze" adopts zirconium and lithium frit glaze with wide firing range and good gloss, which is made of quartz, feldspar, zircon, borax, clay, calcium carbonate , dolomite, boric acid, strontium carbonate, lithium carbonate, bone ash and zinc oxide, the glaze surface is fine and smooth, high brightness, good elasticity, high mechanical strength, good thermal shock stability, lead dissolution rate is 0.000ppm, but due to Zinc oxide is used as a flux in its formula. Although it can reduce the melting temperature of the glaze and improve the gloss of the glaze surface, it has a greater impact on the color development of some pigments under the glaze, especially the chromium tin series pigments.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Embodiment 1, take the following material parts by weighing: quartz 25, borax 12, dolomite 3 (≥200 order MgO≥20%), calcium carbonate 8, strontium carbonate 8, potassium feldspar 10, spodumene 8 (Li 2 O≥5%, Fe 2 o 3 ≤0.4%), lepidolite 7 (Li 2 O≥4.5%, K 2 O+Na 2 O≥9%), albite 9, barium carbonate 4, sodium nitrate 1, potassium nitrate 1.5, lithium carbonate 1, bismuth oxide 2, yttrium oxide 0.5, after mixing, burn in frit furnace and water quenching .

Embodiment 2

[0041] Embodiment 2, the following material parts are weighed: quartz 15, borax 15, dolomite 2 (≥200 mesh MgO≥20%), calcium carbonate 10, strontium carbonate 8, potassium feldspar 20, albite 14, Suzhou soil 6(Al 2 o 3 ≥36%, Fe 2 o 3 ≤0.3%), barium carbonate 2, lithium carbonate 2, bismuth oxide 3, yttrium oxide 1, sodium nitrate 2, after mixing, fire in a frit furnace and quench in water.

Embodiment 3

[0042] Embodiment 3, take the following material parts by weighing: quartz 28, boric acid 16, dolomite 2 (≥200 order MgO≥20%), Suzhou soil 4 (Al 2 o 3 ≥36%, Fe 2 o 3 ≤0.3%), calcium carbonate 12, strontium carbonate 7, potassium feldspar 14.5, albite 10, barium carbonate 2, lithium carbonate 1.5, bismuth oxide 2.5, yttrium oxide 0.5, after mixing, it is fired in a frit furnace, Just water quenching.

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PUM

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Abstract

A fritted glaze without Pb and Zn for ceramics contains SiO2, Al2O3, CaO, MgO, K2O, Na2O, SrO, Li2O, B2O3, Fe2O3, Bi2O3 and Y2O3 proportionally. Its advantages are high adhesion, smooth and bright surface, and gay color.

Description

technical field [0001] The invention relates to a frit glaze for daily-use ceramics, in particular to a lead-free and zinc-free frit glaze. technical background [0002] The glaze with lead as the main component has the advantages of excellent melting performance, high refractive index, good glaze gloss, and wide firing range. However, lead is easy to precipitate during use of lead glaze products, which is harmful to the physical and mental health of users. At present, there are many lead-free glazes on the market. The shortcomings are: 1. The color of the underglaze color is not bright, and the transparency of the glaze is poor; 2. The high-temperature fluidity of the glaze is not enough. Defects; 3. The firing range is narrow, and the production process is difficult to control. Chinese patent 99120405 discloses "advanced daily-use porcelain lead-free frit glaze" adopts zirconium and lithium frit glaze with wide firing range and good gloss, which is made of quartz, feldspa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/02
CPCC03C3/095C03C8/02
Inventor 徐和良范盘华
Owner JIANGSU BAIFU TECH CO LTD
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