Synthetic Mica and Its Comprehensive Utilization

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After nearly 20 years of research, synthetic mica and its products have gradually formed a new industrial category in China, including synthetic mica wafers, mica powder, synthetic mica ceramics, synthetic mica paper and coproducts.

　　In the growth of synthetic mica single crystals, large crystals of synthetic fluorophlogopite have been grown by both endothermic method and seed method, with a maximum area of 506 cm 2, which is the largest synthetic mica sheet in the world so far. The structure of synthetic mica is similar to that of natural mica, and the space group is C. Because synthetic mica does not contain structural water, its temperature is far higher than that of natural mica, reaching 1100 C. It is an excellent insulating rafter material with high temperature resistance. It has a wide range of common uses.

　　Some special applications have been found in recent years, besides being used as electronic tube brackets, capacitors and heat-resistant insulating rafters. Such as high reliable electron tube, long life water level gauge, thermocouple insulator skeleton of resistance surface, window materials such as microwave transmission, X-ray, nuclear radiation, night vision display screen, electron probe, X-ray fluorescence spectrometer and spectrocrystal material, long-wave neutron monochromator, and new adsorbent for purifying radioactive wastewater.

　　In the synthetic mica industrial system based on the internal thermal synthesis of mica, in addition to obtaining a small number of single wafers, there are a large number of broken mica used to produce a variety of synthetic mica composite materials. The main games include synthetic mica powder, synthetic mica ceramics, edible mica paper and its products.

　　2. Synthetic mica powder: Mica powder of various sizes can be obtained by grinding and grading with micro-separator. It is widely used as filler for heat insulation materials, fire-proof coatings, thousand-type fire extinguisher powder, paint, rubber and plastics. In recent years, pearlescent pigments, mica reinforced plastics, heat-resistant enamel, metal high-temperature oxidation-proof coatings, ultra-low hydrogen welding rods and high-temperature lapping and stopping have been developed. Special synthetic mica powder such as welding.

　　Synthetic mica ceramics: Phosphate bonding, glass bonding, melt-casting mica and other ceramic materials are produced by using mica powder. It can be formed by hot pressing, injection or pouring. Its common characteristic is that it has good performance of high temperature absolute rafter, resistance to rapid cold and heat, and can be used for turning, grinding, planer, milling, drilling and other machine mouth worker by ordinary lathe and cutter in wells, with precise size. High finish, widely used in electrical appliances, electrothermal, instrumentation, high-energy ion accelerator and ion nitriding furnace rafters, etc.

　　Synthetic mica paper and its products: Mica crystal block by internal heat method is made into thin sheets by hydraulic braking, and synthetic mica paper is made by papermaking process, then hot-pressed into various plates and rods with inorganic binder. It has a temperature resistance of more than 800oC. It is widely used in electrical appliances, light industry and commercial electric heating equipment. Household appliances made of synthetic mica have the advantages of energy saving and long service life. Synthetic mica electric iron is exported to more than 40 countries and regions in Southeast Asia.