Silicon carbide ceramic for liquid crystal glass substrate and preparation process

Abstract

The invention provides a silicon carbide ceramic for a liquid crystal glass substrate. The silicon carbide ceramic comprises the following raw materials: silicon carbide fine powder, nano zirconium silicate, a reinforcing agent, a coagulant aid, a dispersing agent, potassium borohydride and deionized water. The invention also provides a preparation process of the silicon carbide ceramic for the liquid crystal glass substrate, and the preparation process comprises the steps of raw material mixing, injection molding, soaking washing, and sintering curing. The silicon carbide ceramic for the liquid crystal glass substrate has high thermal conductivity, good high-temperature bending strength, low thermal expansion coefficient, good acid and alkali resistance, uniform temperature and good thermal conductivity. When the silicon carbide ceramic is used in a liquid crystal glass substrate forming area, the substrate yield is high, abrasion resistance is good, hardness and bending strength arehigh, and the thermal expansion coefficient is low, so that the silicon carbide ceramic can better adapt to production of liquid crystal glass panels with larger and thinner sizes.

Description

technical field [0001] The invention relates to the field of silicon carbide ceramics, in particular to a silicon carbide ceramic for a liquid crystal glass substrate and a preparation process thereof. Background technique [0002] The glass substrate is the basic core material of the flat panel display industry. It is an ultra-thin glass sheet with a mainstream thickness of 0.4-0.7mm and an extremely flat surface. It is the basic component of a flat panel display (FPD, Flat Panel Display). (TFT-LCD) is called liquid crystal glass substrate. [0003] The quality of a liquid crystal display first depends on its panel. The liquid crystal panel uses two glass substrates as the carrier, and the surface is made of thin film transistor (TFT) and CF (color film) processing to form a TFT-LCD. Since the panel determines very important parameters such as the brightness, contrast, color, and viewing angle of the LCD to a large extent, its quality and technology are related to the over...

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Problems solved by technology

[0007] The applicant found that in the process of producing liquid crystal glass substrates by the overflow melting method, if the supporting parts in the forming area have poor performance and cannot effectively control the production environment in the area, the molding quality of the molten glass paste will be reduced, resulting in the formation of liquid crystal glass substrates. Quality defects occur, which in turn reduces the yield of liquid crystal glass substrates and increases production costs

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