A kind of mica plate and preparation method thereof

Abstract

The invention relates to a mica board and a preparation method thereof. Using mica flakes / powder that are rarely used or not used in the traditional mica board production process and self-configured various oxide mixed powders as raw materials, the process is carried out in a pressing mold in the form of a layer of mica powder and a layer of various oxide mixed powders. Layered intersecting cloth, with distilled water added evenly as a temporary binder, the block green body obtained after the cloth powder is laminated is put into a muffle furnace, sintered and solidified according to a certain heat treatment system, and annealed to obtain The mica board proposed by the present invention. The present invention adopts mica flakes / powder direct board forming method, which not only simplifies the production process, but also improves the shortcomings of traditional mica board delamination, foaming and low mechanical strength; and the whole production process does not use organic solvents and resin materials, which is environmentally friendly and at the same time It can also improve the disadvantages of the electrical performance of traditional mica boards that are not resistant to high temperatures, thereby achieving the purpose of reducing the production cost of mica boards and improving the quality of mica boards.

Description

technical field [0001] The invention belongs to the technical field of material processing, and relates to a mica material processing technology, in particular to a mica plate and a preparation method thereof, wherein the mica plate is processed into a mica plate from little or no mica sheets used in the traditional mica plate manufacturing process. Background technique [0002] Because mica has typical high resistance properties, it is preferred as an insulating material. It is widely used in a wide range of fields such as electrical appliances and electromechanical. The finished products of mica materials include mica paper, mica board and mica powder. At present, the production method of traditional mica board is as follows: first, the mica sheets are broken and dissociated into certain fine scales by using a hydraulic pulper, then the mica scales are processed into mica paper by sizing and papermaking after the slurry is diluted, and then mica The paper is coated with or...

AI Technical Summary

Problems solved by technology

Under the condition that mica resources are gradually exhausted, the cost problem is more prominent; secondly, the entire process from mica paper to mica board needs to consume a large amount of high-quality fresh water, electricity, and organic solvents such as toluene, which is not conducive to saving and environmental protection; in addition, mica During the production process of the board, the cutting process of the mica paper will produce a large amount of waste and waste

The most important thing is that the defect of laminating the mica board after gluing the mica paper is that there are two layers of film produced by gluing between the mica paper and the mica paper. When the film is affected by high temperature, the film is easy to bubble and delaminate the mica board. cause quality problems

[0003] At present, the technology of changing the paper and board division production method of the existing technology and adopting mica powder to directly press the mica board is rare in China. The exceptions all use organic solvents and organic glues (such as silicone resins). The production process is not environmentally friendly and also leads to poor heat resistance of mica boards (organic silicone resins decompose at relatively high temperatures and emit smoke). Unable to work normally for a long time at high temperature (such as 300-550°C)

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