Method and device for artificially synthesizing large-size fluorophlogopite

Abstract

The invention discloses a method and device for artificially synthesizing large-size fluorophlogopite. The large-size fluorophlogopite is prepared from, by weight, 100 parts of quartz sand (SiO2), 29.1 parts of alumina powder (Al2O3), 28.3 parts of potassium carbonate (K2CO3), 5.3 parts of potassium nitrate (KNO3), 68.3 parts of fused magnesite (MgO) and 37.9 parts of potassium fluosilicate (K2SiF6). By changing the temperature field of the high-temperature area and the low-temperature area of a growth device through a temperature equalizing body, the temperature in a furnace is more uniform;by designing a large-size platinum crucible and a large-size corundum crucible, using long crystals as seed crystals for transverse incubation and adjusting the uniform transverse temperature field and the proper longitudinal temperature gradient, large-size high-quality fluorophlogopite crystals are prepared. The quality percent of pass of large-size synthetic mica can be greatly improved, the problem that materials are desiderated in the high-temperature insulation, high-frequency medium, high-pressure corrosion resistance, biological research, high-energy physics and other fields is solved,and the fluorophlogopite has remarkable economic benefits and social benefits and has broad market application prospects.

Description

technical field [0001] The invention relates to the technical field of crystal material growth or preparation, in particular to a method and a device for artificially synthesizing large-size fluorophlogopite. Background technique [0002] Synthetic fluorphlogopite is artificial mica, and the molecular formula of its single crystal is KMg 3 (AlSi 3 O 10 )F 2 , belonging to the monoclinic crystal system, is a typical layered silicate material, with a temperature resistance of more than 1200 ℃. It is a layered silicate crystal grown from chemical raw materials or mineral raw materials at high temperature through strict process conditions and material ratio, high temperature reaction, melting, cooling and forced crystallization. Synthetic fluorphlogopite has a book-like structure, which has high tensile strength and compressive strength, can withstand large pressure, can be cleaved and peeled, has good flatness, is not easy to deform and age, and is resistant to acid and alk...

AI Technical Summary

Problems solved by technology

Although after years of research, the preparation of large-sized fluorophlogopite still faces a huge challenge. For a long time, the industrial preparation of fluorophlogopite has been prepared by internal heat method. The pass rate and great difficulty, and the preparation of synthetic fluorophlogopite by internal heat method needs to go through operations such as masonry furnace body, electrode installation, crystallization, furnace dismantling, drilling, blasting, etc. The process is long, complicated, and the quality And the qualified rate of finished products is low, and the operating conditions and production process that need to be controlled in the production and preparation process are complex, so that the synthetic mica has low purity, many impurities, and small crystals. Its directional growth has too many influencing factors, and even a little impurity will affect the growth of the crystal. Therefore, it is difficult to effectively control the internal heat method, and it is not easy to prepare large-size fluorphlogopite sheets, which reduces the utilization value of synthetic mica. The synthesis of large-sized fluorophlogopite is still a difficult problem for industrial production

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