Preparation method of quartz ceramic product with complex structure

Abstract

The invention discloses a preparation method of a quartz ceramic product with a complex structure. The preparation method comprises the steps that 1, high-purity fused quartz powder is mixed, lactic acid of which the mass accounts for 0.35%-0.42% of the mass of the quartz powder and sodium sesquicarbonate of which the mass accounts for 0.1%-0.2% of the mass of the quartz powder are added into the high-purity fused quartz powder, and the materials are stirred to be uniform to obtain mixed powder; 2, an adhesive of which the mass accounts for 10%-18% of the mass of the quartz powder in the step 1 is weighed and heated to be melted in a water bath, the mixed powder prepared in the step 1 is poured into the adhesive, and the materials are stirred to be uniform to obtain slurry; 3, the slurry prepared in the step 1 is injected into a mold, the slurry is subjected to temperature lowering through a cooling system of the mold to be cooled and solidified, and a molded blank is taken out; 4, the molded blank in the step 3 is heated until polyethylene wax and vaseline in the molded blank are completely evaporated or completely flow out, firing is conducted by increasing the furnace temperature to 1,050 DEG C-1,250 DEG C, heat preservation is conducted for 4-6 h, the molded blank is cooled along with a furnace, and then the needed quartz ceramic product is obtained.

Description

technical field [0001] The invention belongs to the field of preparation of quartz ceramics, and in particular relates to a preparation method of complex-structured quartz ceramic products. Background technique [0002] Quartz ceramics refer to products made of quartz glass or fused quartz as raw materials through a series of ceramic manufacturing processes such as crushing, molding, and firing. They are also called fused quartz ceramics, quartz glass ceramics, and sintered quartz glass products. Quartz ceramics have been widely used due to their advantages such as good thermal expansion coefficient, good thermal shock stability, and chemical corrosion resistance. However, due to the high viscosity of quartz ceramics, the volatility also increases with the increase of temperature, so it is difficult to produce large-scale complex-shaped quartz ceramic products by the usual process for producing silicate glass products. [0003] Most of the current technology adopts the meth...

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Problems solved by technology

[0004] Considering the problems existing in the process of preparing quartz ceramic products in the prior art, the present invention changes the use of water as the liquid phase in the quartz powder slurry in the prior art, but adds the quartz powder after adding additives Mixing with the melted binder enhances its fluidity and the connection force between powder materials, and solves the molding problem of quartz ceramic products with complex shapes and internal structures.