Ceramic glaze and preparation method thereof

A ceramic glaze and glaze technology, applied in the field of high-performance ceramic glaze and its preparation, can solve the problems of lowering the initial melting temperature of the glaze, pinholes in the glaze surface, and lower product quality, so as to achieve lower melting temperature and smooth surface , the effect of increasing liquidity

Active Publication Date: 2017-12-01

DONGGUAN CITY WONDERFUL CERAMICS IND PARK +1

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AI-Extracted Technical Summary

Problems solved by technology

The low gloss of the matte glaze surface is generally achieved by adjusting the content of alumina. To achieve ultra-low gloss (3-10°) of the glaze, it is necessary to introduce a large amount of alumina, but the content of alumina is too high. When it is high, it will often lead to rough glaze surface and poor hand feeling. It is difficult to ensure good glaze smoothness while achieving ultra-low gloss with the current glaze preparation technology

[0004] For one-time fast-fired bright glaze stoneware tiles, in order to obtain a super...

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Method used

(5) the prepared glaze slurry is applied to the surface of the biscuit by glazing and fired in a fast roller kiln (firing temperature is 1226 ℃, and the time is 50min) to obtain a glossiness of 6 ° and the surface Smooth and fine matte glaze....

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Abstract

The invention discloses ceramic glaze prepared from the following components in weight percentages: 40 to 80% of SiO2, 8 to 20% of Al2O3, 0 to 5% of B2O3, 3 to 13% of CaO, 1 to 6% of MgO, 1 to 10% of BaO, 0 to 5% of ZnO, 1 to 4% of K2O, 1 to 4% of Na2O, 5 to 13% of ZrO2, 0 to 0.5% of Fe2O3, and 0 to 0.5% of TiO2. The invention also discloses a preparation method of the ceramic glaze. In the preparation method of the invention, some raw materials in the glaze formula are calcined at high temperature in advance, which helps to reduce defects such as bubbles and pinholes on the glaze and improves the quality of a product, meanwhile, the melting temperature of the glaze is properly reduced, the fluidity of a glaze melt at the high temperature is increased, and a flat, fine and smooth surface can be easily obtained. By adoption of the preparation method of the invention, the matte glaze with good hand feel and low glossiness can be obtained, and the high gloss glaze with a smooth surface and without pinholes or bubbles can also be obtained, so as to obtain the ceramic product with more excellent performance.

Technology Topic

Smooth surfaceCeramic glaze +4

Examples

Experimental program(4)

Example Embodiment

[0031] Example 1: A high-performance matte glaze and its preparation method

[0032] The mineral raw material composition of the ceramic glaze of this embodiment is (weight content): zinc oxide 4%, barium carbonate 10%, feldspar 40%, alumina 10%, talc 5%, calcite 8%, kaolin 8%, silicon Zirconium acid 15%.

[0033] The corresponding chemical composition of the glaze is: SiO 2 49.4%, Al 2 O 3 14.6%, CaO 5.4%, MgO 1.8%, BaO8.3%, ZnO 4.3%, K 2 O 4%, Na 2 O 1.7%, ZrO 2 10.3%, Fe 2 O 3 0.1%, TiO 2 0.1%.

[0034] The specific preparation steps are:

[0035] (1) Weigh the mineral raw materials according to the above formula, add water ball mill (the weight ratio of material: water is 100:45) for 8 hours to obtain a glaze slurry with a 325 mesh sieve remaining 0.3%. After removing iron from the glaze slurry and sieving, spray drying is used to obtain a powder with a moisture content of about 7%, and the powder is conveyed to a press and pressed into shape;

[0036] (2) The compressed raw materials are fired in a fast roller kiln, the highest firing temperature is 1200℃, and the firing time is 50min;

[0037] (3) Crush the calcined materials and remove iron;

[0038] (4) Add ball soil with 8% material weight content to the crushed materials and 0.4% carboxylate

[0039] Sodium methylcellulose, sodium tripolyphosphate with 0.3% material weight content and water ball mill (material and ball soil: water

[0040] The weight ratio of 100:50) is 13 hours to obtain a glaze slurry with a 325-mesh sieve residue of 0.25%.

[0041] (5) Apply the prepared glaze slurry to the surface of the blank by pouring glaze and fire it in a fast roller kiln (the firing temperature is 1226℃, the time is 50min) to obtain a gloss of 6° and a smooth and delicate surface Matte glaze.

Example Embodiment

[0042] Example 2: A high-performance matte glaze and its preparation method

[0043] The mineral raw material composition of the ceramic glaze of this embodiment is (weight content): zinc oxide 3%, barium carbonate 8%, feldspar 40%, alumina 6%, talc 5%, calcite 8%, quartz 10%, kaolin 6%, zirconium silicate 14%.

[0044] The corresponding chemical composition of the glaze is: SiO 2 55.8%, Al 2 O 3 11.9%, CaO 5.4%, MgO 1.8%, BaO6.6%, ZnO 3.2%, K 2 O 3.8%, Na 2 O 1.9%, ZrO 2 9.4%, Fe 2 O 3 0.1%, TiO 2 0.1%.

[0045] The specific preparation steps are:

[0046] (1) Weigh the mineral raw materials according to the above formula, add water ball mill (material: water = 100:60) for 8 hours to obtain a glaze slurry with a 325 mesh sieve remaining 0.3%. After removing iron from the glaze slurry, spray drying is used to obtain a powder with a moisture content of about 7%;

[0047] (2) The powder is conveyed to the press and pressed into shape;

[0048] (3) The compressed raw materials are fired in a fast roller kiln, the highest firing temperature is 1200℃, and the firing time is 50min;

[0049] (4) Crush the calcined materials and remove iron;

[0050] (5) The crushed materials are added with ball soil with a material weight content of 10%, sodium carboxymethyl cellulose with a material weight content of 0.4%, sodium tripolyphosphate with a material weight content of 0.3% and water ball mill (material and ball soil: Water weight ratio 100:60) ball mill for 13 hours to obtain a glaze slurry with a 325-mesh sieve remaining 0.25%, which is used after iron removal and sieving;

[0051] (6) Apply the prepared glaze slurry to the surface of the blank by glazing and fire it in a fast roller kiln (the firing temperature is 1230℃, the time is 48min) to obtain a gloss of 9° and a smooth and delicate surface Matte glaze.

Example Embodiment

[0052] Example 3: A high-performance bright glaze and its preparation method

[0053] The mineral composition of the glaze (weight content): zinc oxide 3%, barium carbonate 6%, feldspar 30%, talc 8%, calcite 10%, quartz 18%, kaolin 6%, zirconium silicate 15%, low temperature melting Block 4%.

[0054] The corresponding chemical composition of the glaze is: SiO 2 57.7%, Al 2 O 3 8.4%, B 2 O 3 1.5%, CaO 6.2%, MgO2.5%, BaO 5.0%, ZnO 3.7%, K 2 O 3.6%, Na 2 O 1.0%, ZrO 2 10.2%, Fe 2 O 3 0.1%, TiO 2 0.1%.

[0055] The chemical composition of the low temperature frit is: SiO 2 49.8%, Al 2 O 3 10.6%, B 2 O 3 3.4%, CaO 7.5%, MgO 3.4%, BaO 9.6%, ZnO 9.0%, K 2 O 4.4%, Na 2 O 2.3%.

[0056] The specific preparation steps are:

[0057] (1) Weigh the other raw materials except the low-temperature frit in the above formula, and add water ball mill (material: water = 100:45) for 8 hours to obtain a glaze slurry with a 325 mesh sieve remaining 0.3%. After removing iron from the glaze slurry, spray drying is used to obtain a powder with a moisture content of about 6.5%;

[0058] (2) The powder is conveyed to the press and pressed into shape;

[0059] (3) The compressed raw materials are fired in a fast roller kiln, the highest firing temperature is 1080℃, and the firing time is 54min;

[0060] (4) Crush the calcined raw materials and remove iron;

[0061] (5) Add the crushed materials and low-temperature frit with 8% ball earth by weight of the low-temperature frit, 0.4% sodium carboxymethyl cellulose by weight of the material and low-temperature frit, and the weight content of the material and low-temperature frit 0.3% sodium tripolyphosphate and water ball mill (weight ratio of material, low temperature frit and ball soil: water 100:60) ball mill for 15 hours to obtain 0.2% glaze slurry with 325 mesh sieve remaining, after removing iron and sieving for use;

[0062] (6) Apply the prepared glaze slurry to the surface of the blank by glazing and fire it in a fast roller kiln (the firing temperature is 1210℃, the time is 43min) to obtain a gloss of 98° and a smooth surface without defects High-gloss bright glaze.

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the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine

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