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Leadless enamel blocks

A lead-free frit and melting technology, which is applied in the field of frit glaze and frit glaze for ceramics, can solve the problems that daily-use ceramics are not suitable for use, and achieve the effects of wide firing range, good wear resistance and high finish

Inactive Publication Date: 2004-02-04
SHANDONG JINLING MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is not suitable for high-end and high-end daily-use ceramics

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Example 1 The weight percentages of the raw materials used in the lead-free frit glaze are composed of:

[0032] Quartz 20% Feldspar 34% Borax 10% Boric Acid 8%

[0033] Barium carbonate 4% Stalactite 8% Zinc oxide 4% Strontium carbonate 2%

[0034] Lithium carbonate 2% cooked talc 3% aluminum hydroxide 5%

[0035] The above-mentioned raw materials are mixed evenly, and the mixed materials are melted in an industrial converter at a melting temperature of 1300-1350 °C, and the frit fragments are produced after water quenching. Put the frit into a ball mill according to the conventional glaze making method, and wet grind until the glaze slurry with particles with a fineness of ≤10 μm is greater than 85%. Adjust the glaze slurry to a suitable concentration, apply glaze on the once-fired bone china billet by spraying glaze, put it into a sagger, and fire it in the range of 1150-1190 °C. The glazed surface of the product is smooth and bright. After testing: the glossiness...

Embodiment 2

[0036] Example 2 Lead-free frit glaze is taken and melted according to the weight percentage of the following raw materials:

[0037] Quartz 24% Feldspar 34% Borax 7% Boric Acid 5%

[0038] Barium carbonate 4% Stalactite 8% Zinc oxide 5% Strontium carbonate 2%

[0039] Lithium Carbonate 2% Cooked Talc 2% Aluminum Hydroxide 5%

[0040] The above-mentioned raw materials are mixed evenly, and the mixed materials are melted in an industrial converter at a melting temperature of 1300-1350 °C, and the frit fragments are produced after water quenching. Put the frit into a ball mill according to the conventional glaze making method, and wet grind until the glaze slurry with particles with a fineness of ≤10 μm is greater than 85%. Adjust the glaze slurry to a suitable concentration, apply glaze on the ordinary white porcelain body by spraying glaze, put it into a sagger, and fire it in the range of 1150-1190 °C.

Embodiment 3

[0041] Embodiment 3 Take and melt the lead-free frit glaze according to the weight percentage of the following raw materials:

[0042] Quartz 15% Feldspar 39% Borax 7% Boric Acid 15%

[0043] Barium Carbonate 3% Calcium Carbonate 6% Zinc Oxide 3% Strontium Carbonate 2%

[0044] Lithium Carbonate 4% Cooked Talc 4% Aluminum Oxide 2%

[0045] The preparation and firing methods are the same as in Example 1.

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Abstract

A non-lead fritted glaze for ceramics is prepared from quartz, feldspar, borax, boric acid, barium carbonate, stalactite, zinc oxide, strontium carbonate, lithium carbonate, prepared talc, and aluminium hydroxide through proportionally mixing, fusing at 1300-1350 deg.C, quenching in water, and grinding. Its advantages are wide range of calcine temp, low calcine temp. high surface finish quality, no lead, and high antiwear performance.

Description

technical field [0001] The invention belongs to the technical field of a frit glaze for ceramics, in particular to a frit glaze with a bright glaze surface and lead-free dissolution. Background technique [0002] Lead-containing glaze formulations are generally used in the production of bone china and other high-grade household ceramics. The frit formed by lead and other alkali metal oxides has the advantages of low melting point, high brightness and high mechanical strength. For many years, a kind of lead-containing frit glaze has been widely used. Some countries in Europe do not have restrictions on the solubility of lead. They use low-melting or high-soluble lead silicate and lead borate frit glazes. In my country, lead oxide is mainly used as an additive to lead-containing glazes. The typical lead metasilicate formula in the UK in actual production consists of: (Segel type) 1.00 lead oxide, 0.10 aluminum oxide, 1.89 silicon dioxide, weight: lead oxide 64%, aluminum oxid...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/02C03C8/04
Inventor 邹宏杰李世国张宁田晓冰毛晓敏
Owner SHANDONG JINLING MINING CO LTD
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