Method for reducing firing shrinkage coefficient of alumina ceramic material and product made by the same

Abstract

The invention discloses a method for reducing the firing shrinkage coefficient of an alumina ceramic material and product made by the same. The firing shrinkage coefficient of the alumina ceramic material can be reduced by adopting metal aluminum powder instead of aluminum oxide powder so as to reduce the firing deformation rate of the product; the accurate control on size of alumina ceramic product can be implemented, and the post-processing cost of the product can be reduced by controlling the firing shrinkage coefficient to be tiny; the method for reducing the firing shrinkage coefficient of the alumina ceramic material is suitable for industrialized production.

Description

technical field

[0001] The invention belongs to the field of inorganic materials, and in particular relates to a method for reducing the firing shrinkage of alumina ceramic materials and a product obtained therefrom. Background technique

[0002] Alumina is an important structural and functional ceramic material, which is widely used as a component in modern industry and high technology. The firing shrinkage of alumina ceramic materials is relatively large. The shrinkage varies with the forming method and the particle size of the raw materials. Generally, the shrinkage is in the range of 10% to 25%. Large firing shrinkage directly leads to product deformation, which is difficult to achieve. Dimensional accuracy requirements for parts assembly often require post-processing such as grinding, cutting, and polishing of burned products. In the process of post-processing, products with large deformation require a large amount of processing, and post-processing of high-hardness al...