Preparation method of zirconium silicate-coated black pigment

Abstract

The invention relates to a method for preparing a zirconium silicate-coated black material, which comprises the following steps: (1) uniformly mixing melanin particles, zirconium silicate powder and flux powder to form a mixture; (2) using microwaves to mix The material is heated until the zirconium silicate powder melts into a liquid phase and is uniformly wrapped on the outside of each melanin particle; (3) annealing. The present invention makes full use of the characteristics of melanin particles such as graphite powder, plant carbonized carbon black, and organic matter conversion carbon black that can fully absorb microwave heat, changes the lattice characteristics of melanin particles, increases the surface activity of melanin particles, and uses flux to assist in melting silicon Zirconium acid, forming a liquid phase to realize the zirconium silicate wrapping of melanin, forming a denser, stronger adhesion transparent composite layer, the quality of the black pigment is better, only by adding flux for microwave heating treatment, the process only It takes tens of minutes, and the process is simple, the cost of raw materials is low, energy saving and environmental protection, and it is suitable for industrialized production.

Description

technical field [0001] The invention relates to a method for preparing a black pigment, in particular to a method for preparing a zirconium silicate-wrapped black material. Background technique [0002] Black pigments are widely loved by people because of their dignified and pure decorative effects, and have always been the most important ceramic decorative pigments, accounting for the largest market share of ceramic pigments. Black pigments on the market are mainly mixed spinel pigments, which are generally synthesized from chromium oxide, cobalt oxide, ferric oxide and manganese oxide. The spectral absorption of chromium ions, cobalt ions and iron ions can mutually inhibit their ions. The principle of light transmittance. When their ion concentration ratio is properly adjusted, their spectral curves can complement each other after being superimposed, and all visible light is absorbed to appear black. Considering that the formation of black is obtained through the coordin...

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Problems solved by technology

However, there are problems such as long preparation cycle, large production energy consumption, complicated process, and unsuitability for industrial production.

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