Preparation method of composite spinel/titanium dioxide green ceramic pigment

Abstract

The invention relates to a preparation method of composite spinel / titanium dioxide green ceramic pigment. The preparation method comprises the following steps: (1) adding 0.091 to 0.103 g of TiCo2O4 into a mixed solution consisting of P123, absolute ethyl alcohol and deionized water, wherein the mixed solution is formed as follows: the content of the P123 is 0.8 to 1.8 g, the content of the absolute ethyl alcohol is 400 to 600 ml, and the content of the deionized water is 3 to 5 ml; (2) adding 3.4 to 5.1 g of butyl titanate or 1.9 to 2.9 g of titanium tetrachloride, uniformly stirring, and adjusting the pH to 7.0 to 9.0; (3) stirring at the rate of 100 to 500 r / min, standing for a period of time, collecting a product, and washing for three times by using water and absolute ethyl alcohol respectively; and (4) drying, and grinding a product to obtain the green ceramic pigment. The invention adopts an environment-friendly and energy-saving method to synthesize the composite ultrafine green ceramic pigment with the advantages of small granularity, high dispersity, no toxicity or low toxicity, simple and controllable process, high near-infrared reflective index, bright color, and high chemical stability.

Description

Technical field [0001] The invention belongs to the technical field of ceramic pigments, and specifically relates to a method for preparing spherical composite ultrafine green ceramic pigments. Background technique [0002] Green is a common color in nature, a color between blue and yellow in the spectrum. The light wave is about 550nm, one of the three primary colors, and the color opposite to green is magenta, but it is not traditionally considered red. Green is a neutral color, both warm and cold. Green ceramic pigments are indispensable decorative materials for ceramic decoration art whether they are used for the color decoration of ceramic products, or as the color agent of ceramic color glaze or color embryo. Traditional green pigments usually use chromium oxide as a coloring agent and add a certain amount of natural mineral raw materials and oxides such as Ca and Mg. This kind of pigment is firstly toxic; secondly, the color difference. The oxygen partial pressure and t...

AI Technical Summary

Problems solved by technology

This kind of pigment is poisonous; the second is color difference. The oxygen partial pressure and temperature in the atmosphere are sensitive to chromium oxides, such as Cr 2 o 3 It exists in the form of CrO or Cr in a reducing atmosphere, and may be in the form of Cr in an oxidizing atmosphere. 3 o 4 Form exists, this characteristic makes it difficult for the product to achieve the purpose of uniform color tone

Third, the color is dark green, and the use of traditional pigments is often accompanied by pinholes in the glaze and peeling of the glaze.

However, the solid-phase method is used in the preparation process, which requires a high temperature (1200°C). Drying after wet grinding requires a lot of energy and is not conducive to energy saving and emission reduction. The cost is also high, and the particle size is large. certain component segregation

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