Synthetic fluorophlogopite and preparation method thereof

Abstract

The invention provides synthetic fluorophlogopite which is colored fluorophlogopite. The synthetic fluorophlogopite is prepared by 100 parts by weight of fluorophlogopite basic raw material and 3-58 parts by weight of color additive, wherein the fluorophlogopite basic raw material is composed of the following ingredients in percentage by weight: 18-21% of K2SiF6, 28-31% of MgO, 8-13% of Al2O3, 2-5% of K2CO3 and 34-38% of SiO2; and the color additive is selected from one or more of the following ingredients in parts by weight: 5-15 parts of TiO2, 3-10 parts of Cr2O3, 5-15 parts of Fe2O3, 5-10 parts of CuO or 4-8 parts of CrO3. The synthetic fluorophlogopite provided by the invention has richful colors ad is capable of meeting the demands of various fields. The invention further provides a preparation method of the fluorophlogopite. By adopting the invention, the production cost can be greatly reduced, and the product quality is improved.

Description

technical field [0001] The invention relates to a synthetic mica, in particular to a colored fluorophlogopite and a preparation method thereof. Background technique [0002] The traditional technology of synthesizing fluorophlogopite by internal heat method has become a relatively mature technology after decades of trial production, exploration and improvement. Because the production process is relatively backward, the product quality is uneven, the quality of raw materials varies from place to place, and the formula has not changed for many years, so the product quality is extremely unstable. The products produced by most manufacturers are generalized, and the production cost is relatively high, and the product is single. , the market is restricted by many factors and is extremely uncompetitive. [0003] The existing internal heat method synthesis of fluorphlogopite has been carried out in China for more than 40 years of research, trial production and production, including...

AI Technical Summary

Problems solved by technology

[0018] 1 Single product variety: At present, only one silver-white transparent crystal can be produced

The white and transparent synthetic fluorine phlogopite chip is an ideal material as the base material of the silver-white pearlescent pigment. If the coating is a new variety of pearlescent such as color or interference color, the effect is not ideal.

The product is single and has certain limitations in application

[0019] 2. Product quality: Compared with natural muscovite, the fluorophlogopite crystals produced by the existing technology have certain advantages, such as: pure and transparent, high whiteness, high temperature resistance, etc., but there are also obvious shortcomings, such as: the wafer appears hard and brittle, There are some mica phase glass impurities between the wafer layers, which are relatively hard

Otherwise, the required diameter-to-thickness ratio will not be achieved, which will directly affect the quality of downstream products

[0020] 3 High cost: Synthetic fluorphlogopite is a special crystal material in the mica family of typical silicate minerals, and the growth conditions are relatively harsh

(2) High-temperature melting process, high power consumption, about 1.5 degrees of electricity to prepare 1 kg of mica flakes

(3) The formed silicate solution seriously erodes the refractory bricks of the kiln body, about 60% of the refractory bricks cannot be reused, and the sewage treatment is difficult

These factors add a lot to the cost

[0021] 4. Low efficiency: due to the particularity of the industry, the product application area is narrow, there is no matching equipment to choose from, the process is difficult to straighten out, and some production links are still implemented by labor

Therefore, the efficiency is low and the competitiveness is weak

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