Method for preparing zircon refractory material by using particle size distribution combined with gel injection molding process

Abstract

The invention discloses a method for preparing a zircon refractory material by using particle size distribution combined with a gel injection molding process. The method comprises the steps of particle size distribution of powder, preparation of a premixed solution, preparation of ceramic slurry, injection molding, demolding and drying of a wet blank, degreasing of a green body and sintering of a biscuit. The whole process flow is simple, easy to control and suitable for neat size complex forming, and does not need expensive isostatic pressing equipment; under the condition that the solid content is 56vol%, the bending strength of the zircon green body obtained by virtue of particle size distribution can reach 52.6MPa; the bending strength of the compact zircon obtained after degreasing the green body and sintering at 1550 DEG C is 111.9MPa; and compared with a sintered body which is prepared from complete fine powder and complete coarse powder with the same solid content, the strengths are improved by 20.6% and 65.2% as well as 49.1% and 11.8% respectively. The qualitative characterization method of a wet blank drying process does not depend on product sizes and has a wider application scope.

Description

technical field [0001] The invention relates to the field of molding and preparation of refractory materials, in particular to a method for preparing zircon refractory materials by using particle grading combined with a gel injection molding process. Background technique [0002] Among the current glass production methods, in addition to the float method and the slot drawing method, the melting method is also a commonly used method, especially suitable for the production of glass substrates and other products required for liquid crystal displays. In this method, the refractory parts have to be in direct contact with the liquid molten glass for a long time. Because of this, this glass production method has very strict requirements on refractory materials. The main component of zircon is ZrO 2 ﹒ SiO 2 , or equivalent to ZrSiO 4 , which has the characteristics of high melting point, low thermal conductivity, good chemical stability, small thermal expansion coefficient, etc....

AI Technical Summary

Problems solved by technology

However, there are few studies on the influence of particle grading technology on the gel injection molding process. One important reason is that the aggregate and coarse particle sizes in the traditional grading process are relatively large, which is not suitable for the gel injection molding process. Yes, because the larger the particles, the greater the influence of their own gravity, and the more difficult it is to suspend and disperse stably in the slurry, which not only increases the difficulty of the slurry preparation process, but also makes the production process difficult due to the sedimentation of the particles. Uneven billet structure

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