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Leadless ceramic glaze and preparation method thereof

A technology of lead-free ceramics and glazes, which is applied in the field of lead-free ceramic glazes and its preparation, which can solve the problems of limited range of use, limited product variety, under-fired or over-fired, etc., to reduce usage and broaden firing Scope, the effect of improving the pass rate

Inactive Publication Date: 2013-04-17
GUANGDONG DONGBAO GRP
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] Although some lead-free ceramic glaze formulations also appear in the existing ceramic glaze technology, these formulations are basically mainly used in high-end bone china, and the scope of use is relatively limited
Moreover, the content of Zn in the glaze is relatively high, which has a relatively large negative impact on the color development of colors such as black, pink, and coffee, thereby limiting the richness of the product.
Or some lead-free glazes contain heavy metal Bi 2 0 3 , bismuth oxide and lead oxide are both heavy metals, which are toxic and expensive
The existing lead-free glaze formulations still have a narrow range of glaze firing, which is likely to cause defects such as under-fire or over-fire

Method used

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Examples

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Embodiment Construction

[0014] The present invention will be further described below in conjunction with specific examples.

[0015] 35 parts of quartz powder (200 mesh), 30 parts of potassium feldspar powder (200 mesh), 13 parts of borax, 5.5 parts of zinc oxide, 3 parts of zirconium silicate, 1.5 parts of lanthanum oxide, 10 parts of calcium carbonate, and 4 parts of magnesium carbonate , 1 part of hematite, 3 parts of barium carbonate, 3 parts of strontium carbonate, 6 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.

[0016] Put the frit into a ball mill, add water and 15 parts of kaolin to grind it into a glaze slurry, and the fineness is controlled at 0.02 parts over a 10,000-hole sieve. Apply the glaze to the bone china biscuit, dry it, put it into a kiln, and fire it at 1020°C-1180°C.

[0017] The glaze material described in the embodiment has a wide firing range and a wide application ra...

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PUM

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Abstract

The invention discloses a leadless ceramic glaze and preparation method thereof, wherein the glaze contains the following components by weight: 63 parts of SiO2, 7 parts of Al2O3, 5 parts of CaO, 3.5 parts of MgO, 4 parts of BaO, 3.5 parts of SrO, 7.5 parts of ZnO, 5.5 parts of K2O, 4.6 parts of Na2O, 4 parts of Li2O, 1 part of Fe2O3, 6.5 parts of B2O3, 3 parts of ZrO2, and 1.5 parts of La2O3.

Description

technical field [0001] The invention relates to a lead-free ceramic glaze and a preparation method thereof. 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 are of low grade and poor quality due to pores and air bubbles on the glaze surface and poor surface gloss. 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, which is harmful to human body and environment. With the deepening of people's understanding of the toxicity of lead and its compounds and the improvement of environmental awareness, countries have increasingly strict restrictions on the content and use of lead. [0003] Although some lead-free ceramic glaze formulations have also appeared in the existing ceramic glaze technology, these formulation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B41/86
Inventor 刘荣海
Owner GUANGDONG DONGBAO GRP
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