Ceramic pigment choice and its easy formula design

Published: 16 May 2009 18:56:58

Ceramic Color and glazes, is building sanitary ceramics products decorative coat. Products with ceramic glaze of the matrix and in close connection with one, plays a decorative landscaping architecture the role of sanitary ceramics products, enabling products to form a colorful world of ceramics. Now the development of ceramic industry has entered a new era of color glaze, building sanitary ceramics products decorative more and more inclined to direct the use of a variety of color glaze in order to build a range of new product lines to meet the diverse needs of domestic and foreign markets. Therefore, the master glaze ceramic pigment good use of technology, for improving product quality and rich varieties of enterprise products and variety of great significance. Pigment pigment use of technology includes products used in ceramic glaze all the technological aspects, mainly the use of technology have pigment problem conditions; pigment hue problem; pigment particle size selection problem; pigment compatibility problem with rejection, etc. Several technical characteristics and technical requirements. Pigment of the problem is actually a, which also relates to other relevant disciplines, such as chromatology, ceramics of Physical Chemistry and Technology issues. Ceramic pigment selection and use of technology is crucial to a direct impact on the quality of the product bearing the economic efficiency of enterprises. In the past, ceramic pigment used in the name refers to the entire color decoration of ceramic raw materials (including high temperature and low temperature), embraces a wide range; and pigment refers only to the low-temperature sintering ceramics decorative pigments, only ceramic pigments are a type of it. However, in academia and the majority of ceramics enterprises, whether pigment or pigments, are accustomed to the two names can be interchangeable, staggered use, there is no prejudice.

1, ceramic pigment adaptation process conditions.

In ceramic production enterprises, different ceramic products used in a variety of pigment and paint, should be able to meet the actual production process requirements, be able to form a desired decorative effect, improve the grade of products. Building sanitary ceramics products currently used in ceramic pigment and ceramic pigments, ceramics for daily use should be compared with the more abundant. Building sanitary ceramics products decorative ornaments in the color method, has been divided into underglazed colors,glaze, glaze colors, color, colored glaze and color make-up soil and other aspects.

However, the pigment Although many types of decorative techniques, but the use of effects and the range of options have their advantages and disadvantages in the use of selection should be strict. For example, color underglazed are expected to carry out underglazed color ornaments above and then covered with a layer of transparent glaze, flower color patterns in underglazed face with a good sense of decorative glass. However, because of the high sintering temperature (1200-1320 degrees), optional pigment instead of a narrower range of species; glaze color pigment type of painting in the glazed surface, using low-temperature firing, the pigment attached to the glaze surface , because of roast color temperature low (650-830 degrees), with the pigment available a wide range of advantages.

However, because of its pigment in the glaze on, easy to produce pigment in the dissolution of metal compounds the problem;glaze technology sector in the glaze color and the color between underglazed (sintering temperature of 1100-1200 degrees), the pigment particles in the glaze layer of the middle, forming a hazy hue of beauty, but also used by certain restrictions on the type of pigment;color pigment used to blending into the blank inside, so that the excellent effect of the formation of ceramic products,surface generally transparent glaze; glaze is to direct the introduction of pigment and paint glaze, so that the formation of colored glaze glaze (firing temperature of 1150-1280 degrees); there is a will add to the insoluble pigment in kaolin , made of pottery clothing (also known as make-up soil) for the decoration of ceramics, known as the color make-up soil, soil makeup can cover such a dirty brick tiles, role a lot. But much remains to be in the makeup pigment soil surface layer of transparent glaze(sintering temperature of 1150-1250 degrees), to increase the role of protection and bright.

In actual use, a variety of ceramic pigment and pigments have different firing range, the temperature is too high and too low would have an adverse effect on fineness. Some firing a wide range of pigment, such as chrome-tin pink, bluelike. Both can be used for high temperature sintering also underglazed color glaze color can be used in low-temperature sintering, and their effects are excellent fineness. Some pigment fineness of the scope of fixed, use a lot of taboo, such as lead acid antimony pigments, can be used only low-temperature glaze color and glaze decoration products, if more than temperature, while the loss of color. In addition to sintering temperature, there are a considerable number of pigment and paint flames on the firing when the kiln atmosphere is very sensitive, such as copper oxide pigments, in the oxidation flame when the green, and in the reduction will be shown when flame red, color very large changes.

In full knowledge of a variety of process performance ceramic pigment, the pigment should also be on other aspects of understanding, such as ceramic pigment fineness (pigment commonly used types of) questions, the use of atmosphere temperature range and flame characteristics, color range and its taboo requests should not be ignored.

2, commonly used ceramic pigment and its deployment requirements

Building sanitary ceramics products tend to glaze colorful decoration, the types of pigments used in more and more. With advances in technology, modern ceramic industry used in paint products and the emergence of new types of new use. In recent years such as the rare-earth materials and nano-ceramic color ceramic pigment, such as the types of people to bring a fresh new feeling. Here only the conventional types of ceramic pigment species introduction and use of effects is as follows, because these pigment is still the most important decorative materials are current varieties.