Lead-free and cadmium-free bone china glaze and preparation process thereof

A preparation process and technology of bone china, applied in the field of lead-free and cadmium-free bone china glaze, can solve problems such as harm to human body, and achieve the effect of high glaze hardness, pure color and good gloss.

Inactive Publication Date: 2010-11-24
SHENZHEN YONG FENG YUAN IND
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lead is a heavy metal element that is harmful to the human body and the environment

Method used

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  • Lead-free and cadmium-free bone china glaze and preparation process thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Embodiment 1: with 32 parts of quartz powder (200 orders), potassium feldspar powder (200 orders), 33 parts, 10 parts of borax, 3 parts of zinc oxides, 2 parts of zirconium silicates, 2 parts of lanthanum oxides, 7 parts of calcium carbonate, 2 parts of magnesium carbonate, 2 parts of barium carbonate, 3 parts of strontium carbonate, 4 parts of lithium carbonate. After mixing the above raw materials evenly, melt them at 1380℃~1450℃, put them into cold water and quench them into a frit.

[0015] Put the frit into a ball mill, add water, 3% kaolin and 0.02% ammonium chloride to grind into a glaze slurry, the specific gravity of the glaze slurry is controlled at 1.65-1.72kg / l, and the fineness is controlled at less than 0.03% on a 10,000-hole sieve. Spray the glaze on the bone china biscuit that has been fired at a high temperature of 1250-1280°C, dry it, put it into a kiln, and fire it at 1050-1180°C.

Embodiment 2

[0016] Embodiment 2: with 21 parts of quartz powder (200 orders), potassium feldspar powder (200 orders), 35 parts, 6 parts of borax, 4 parts of zinc oxides, 5 parts of zirconium silicates, 3 parts of lanthanum oxides, 13 parts of calcium carbonate, 3 parts of barium carbonate, 5 parts of strontium carbonate, 2 parts of lithium carbonate, 3 parts of phosphorus pentoxide. After mixing the above raw materials evenly, melt them at 1380℃~1450℃, put them into cold water and quench them into a frit.

[0017] Put the frit into a ball mill, add water, 5% kaolin and 0.025% polyvinyl alcohol to grind it into a glaze slurry. The specific gravity of the glaze slurry is controlled at 1.65-1.72kg / l, and the fineness is controlled at less than 0.03% on a million-hole sieve. Spray the glaze on the bone china biscuit that has been fired at a high temperature of 1250-1280 ℃, put it into a kiln after drying, and fire it at 1050-1180 ℃.

Embodiment 3

[0018] Embodiment 3: 25 parts of quartz powder (200 orders), potassium feldspar powder (200 orders), 27 parts, 5 parts of kaolin, 12 parts of borax, 5 parts of zinc oxide, 1 part of zirconium silicate, 0.5 part of lanthanum oxide, carbonic acid 10.5 parts of calcium, 4 parts of barium carbonate, 1 part of strontium carbonate, 4 parts of lithium carbonate, 5 parts of phosphorus pentoxide. After mixing the above raw materials evenly, melt them at 1380℃~1450℃, put them into cold water and quench them into a frit.

[0019] Put the frit into a ball mill, add water and 8% kaolin to grind it into a glaze slurry, the specific gravity of the glaze slurry is controlled at 1.65-1.72kg / l, and the fineness is controlled at less than 0.03% on a million-hole sieve. Spray the glaze on the bone china biscuit that has been fired at a high temperature of 1250-1280°C, dry it, put it into a kiln, and fire it at 1020-1180°C.

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Abstract

The invention discloses a lead-free and cadmium -free bone china glaze and a preparation process thereof. The lead-free and cadmium-free bone china glaze comprises the following compositions in percentage by weight: 50.0 to 62.0 percent of SiO2, 6.0 to 10.0 percent of Al2O3, 6.0 to 10.0 percent of CaO, 0.5 to 4 percent of MgO, 0.0 to 2.0 percent of BaO, 0.5 to 3.0 percent of SrO, 6.0 to 10.0 percent of ZnO, 2.0 to 6.5 percent of K2O, 1.0 to 5.0 percent of Na2O, 0.2 to 3.0 percent of Li2O, 1.0 to 3.0 percent of B2O3, 1.0 to 3.5 percent of ZrO2, 0.2 to 1.0 percent of La2O3, and 0.1 to 2.0 percent of P2O5. By optimizing the glaze formula, the glaze has no lead and cadmium, so the glaze is non-toxic and environment-friendly. The lead-free and cadmium-free bone china glaze and the preparation process thereof have the advantages of reducing the consumption of zinc oxide, overcoming the defects of soft glaze, easy scratching and color disadvantage caused by high zinc oxide content, and improving the hardness of the glaze by optimizing the chemical compositions of the glaze.

Description

technical field [0001] The invention belongs to the technical field of ceramic glazes, and in particular relates to a lead-free and cadmium-free bone china glaze which can be used in the field of high-grade daily-use ceramics and a preparation process of the bone china glaze. Background technique [0002] Ceramic glaze has an important influence on the appearance quality of ceramic products. At present, most of the ceramic products in our country have capillary pores, air bubbles and poor surface gloss on the glaze surface, resulting in low-grade products and poor quality. Lead-containing glazes with low melting point, high elastic modulus and high gloss are mostly used in high-end ceramic products with high appearance requirements. However, lead is a heavy metal element, which is harmful to human body and environment. With the deepening of people's understanding of lead and its compounds and the improvement of environmental awareness, countries have increasingly strict re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/86
Inventor 刘权辉曾学富
Owner SHENZHEN YONG FENG YUAN IND
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