Enamel color material, preparation method thereof, and application in porcelain body painting enamel cultural relic repair

Abstract

The invention discloses an enamel color material, a preparation method thereof, and an application of the enamel color material in porcelain body painting enamel cultural relic repair. The enamel color material is prepared from the following chemical components in percentage by mass: 33%-51% of silicon dioxide, 0%-3.8% of aluminum oxide, 8%-19% of boron oxide, 31%-53% of lead oxide, 0%-6% of calcium oxide and magnesium oxide, 0%-6.9% of sodium oxide and potassium oxide, 0.5%-6% of bismuth trioxide, 0%-7.2% of tin oxide, 0%-6.5% of antimonous oxide, 0%-13% of ferric oxide, 0%-4.2% of copper oxide, 0%-4% of cobalt oxide, 0%-9% of manganese oxide, 0%-2% of silver oxide and 0%-0.15% of gold oxide. Compared with the traditional enamel painted porcelain, the enamel painted porcelain provided bythe invention has the advantages that the melting point is lower; the colored glaze and an ancient enamel colored pigment layer show a "like-fusion-like" phenomenon at high temperature, can be matchedwith the thermal expansion coefficients of the surface glaze and the pigment layer of the traditional enamel color, has good adhesiveness and good adhesiveness before firing, is easy to disperse, hasmoderate material surface tension in the firing and fusing process, not only meets the fusing property, but also can keep a certain colored drawing three-dimensional shape.

Description

Technical field [0001] The invention relates to the technical field of cultural relics restoration, in particular to an enamel color material and a preparation method and its application in the restoration of porcelain painted enamel cultural relics. Background technique [0002] China’s earliest monograph on appreciation of cultural relics, "Ge Gu Yao Lun", introduced "enamel" as "the body made of copper and the five-color flower made with medicine, similar to the Buddha's inlay". The traditional enamel products are made of silicate. Mineral quartz, lead red, borax, feldspar and other raw materials are mixed in appropriate proportions, and various colored metal oxides are added, and then roasted, cooled, and ground to produce powdered enamel. The enamel color material is then filled or painted on the surface of metal tires, glass tires, porcelain tires, and purple sand tires according to different colors and crafts, and then fired to make enamelware. The enamelware is named acco...

AI Technical Summary

Problems solved by technology

By thickening the "glass white" double-firing method, it produces a "bright" and "stacked" feeling similar to enamel colored porcelain, but in this method, "glass white" does not have B 2 o 3 Acting as a fluxing effect, it will reduce the glass texture, refractive index and luminosity at the same time, and cannot achieve the effect of traditional enamel colored porcelain

The second is the method of "fluxing low borosilicate glass and adding synthetic inorganic pigments" using modern technology. Among low borosilicate glass, B 2 o 3 The content of the paint is low, usually less than 8%, which will lead to two effect problems, one is that the painted enamel is not transparent, and the other is that the enamel has a high viscosity and the dispersion of the pigment is not good. The color particles can be seen under the magnifying glass, which affects the effect. In addition, low borosilicate glass has a high softening temperature, and the refiring temperature as a cultural relic restoration material is higher than the softening temperature of the original enamel glaze, which will cause cracking and melting of other parts of ancient ceramics, which will not only fail to repair, but also damage original ancient ceramics

The third method is based on "Li 2 O-K 2 O-Na 2 O-SiO 2 " as the main system, add colored frit made of Co, Sb color metal ions, and then grind the colored frit into powder, paint and then put it into the kiln for firing. This method is closest to the traditional process. The material of this system can be used alone To draw imitation enamel color porcelain, but the formula temperature is significantly higher than the "PbO-B" of the original enamel color 2 o 3 -SiO 2 " system, and because of its different systems, it cannot be "similar and melted" with the color layer of ancient ceramics, so it cannot be used as a repair material for ancient enamel colored ceramics.

There are many alkali metal elements in the glass composition, the glass structure is loose, and its coefficient of thermal expansion is 80×10 -7 -95×10 -7 m / K, higher than ceramic 65×10 -7 -70×10 -7 m / K coefficient of thermal expansion, which will lead to glaze cracking and peeling after decorative ceramics, easy to damage the decorative effect of tea sets and tableware, etc.

[0007] A patent No. CN1093684A, a Chinese invention patent titled ceramic overglaze pigment coating and its processing and products, discloses a ceramic overglaze pigment coating for preventing lead from leaching out at high temperatures, wherein the viscosity modifier used is 5%-8%Al 2 o 3 , the purpose is to improve the high temperature viscosity, the melting temperature is 1300-1350 ℃ so that the lead is not easy to volatilize in the secondary firing process, which is different from the low viscosity and low melting point required by the present invention, and it cannot be used as an ancient ceramic repair material.

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