Caramel yellow spot crystal glaze
A crystalline glaze and macular technology, applied in the field of sauce-colored macular crystalline glaze, can solve the problems of easy bubbles on the glaze surface, narrow firing range, low high temperature viscosity, etc., achieve stable color, reduce firing temperature, calcium and iron content high effect
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Embodiment 1
[0022] A caramel macular crystalline glaze is prepared from the following raw materials in parts by weight: 45-55 parts by weight of black medicine, 24-30 parts of ilmenite, 13-17 parts of calcite, 2.5-3.5 parts of iron ore, and 4-6 parts of rutile.
[0023] The black medicine, ilmenite, iron ore, calcite and rutile in the formula are all from Yuzhou. Among them, the black medicine is a kind of clay with high iron content, containing about 64% silicon oxide and 12% aluminum oxide. About 4.5% of iron oxide, about 5.5% of calcium oxide, about 3% of magnesium oxide and a small amount of other elements, the content of calcium oxide in calcite is about 55%, as a cosolvent, can reduce the firing temperature; the content of titanium oxide in ilmenite is 45-50%, iron oxide content is 32-38%, also contains a small amount of silicon oxide, calcium oxide, magnesium oxide and other elements, mainly used as crystallization agent and colorant. Iron ore contains more than 70% iron oxide, rut...
Embodiment 2
[0033] A caramel-colored macular crystalline glaze is prepared from the following raw materials in parts by weight: 50 black medicine, 27 ilmenite, 15 calcite, 3 iron ore, and 5 rutile.
[0034] The preparation method of caramel macula crystalline glaze of the present invention, comprises the following steps:
[0035] (1) Mix the above raw materials, ball mill, and pass through a 250-mesh sieve to obtain glaze slurry;
[0036] (2) Glaze is applied to the carcass after bisque firing;
[0037] (3) Firing, specifically divided into the following stages:
[0038] ① Oxidation stage: rise from room temperature to 1000°C in 6 hours;
[0039] ②Heavy reduction stage: heat up to 1220°C in 7 hours;
[0040] ③Light reduction stage: heat up to 1285°C in 1.5h; hold for 30min;
[0041] ④ Cooling stage: Cool down to 1150°C in 30 minutes, keep warm for 30 minutes; then cool naturally to room temperature.
[0042] The product prepared in this example has ice-like yellow spots flashing in t...
Embodiment 3
[0044] A caramelized macular crystalline glaze is prepared from the following raw materials in parts by weight: 52 parts by weight of black medicine, 26 parts by weight of ilmenite, 17 parts by weight of calcite, 2.5 parts by weight of iron ore, and 5 parts by weight of rutile.
[0045] The preparation method of caramel macula crystalline glaze of the present invention, comprises the following steps:
[0046] (1) Mix the above raw materials, ball mill, and pass through a 250-mesh sieve to obtain glaze slurry;
[0047] (2) Glaze is applied to the carcass after bisque firing;
[0048] (3) Firing, specifically divided into the following stages:
[0049] ① Oxidation stage: rise from room temperature to 1000°C in 6 hours;
[0050] ②Heavy reduction stage: heat up to 1220°C in 7 hours;
[0051] ③Light reduction stage: heat up to 1285°C in 1.5h; hold for 30min;
[0052] ④ Cooling stage: Cool down to 1150°C in 30 minutes, keep warm for 30 minutes; then cool naturally to room temper...
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