Method for preparing polycrystal texture ceramic material

Abstract

This invention relates to polycrystal texture ceramic material preparation method, it includes preparation technique principle and corresponding technique method. Diffusion route of ion and polar particle in high temperature field can be affected by electrostatic field, the characteristic is used to induct crystal nucleus growth process and reinforce anisotropy growth to form texture polycrystal material. Different strength orientation electric field is applied, and the strength is related to material system different component, core forming and crystal growth speed, anisotropy radius-thickness ratio expected, and electric breakdown strength of environment and materials. The anisotropy growth of polusrystal texture made is appreciable, polyspinal deformity is uniform, breaking tenacity and fracture toughness of material on wishful direction can be improved. Directed dielectric property can be great improved, and material piezoelectric constant and electromechanical conpling factor can be improved, dielectric loss can be reduced.

Description

Technical field: [0001] The invention belongs to the field of material science, and relates to a process method for preparing polycrystalline textured ceramic materials using the auxiliary principle of electric field force effect, which is called an electric field intervention method for preparing polycrystalline textured ceramic materials. technical background: [0002] In the ceramic material preparation process technology, most of them involve the main process steps such as raw material dispersion and mixing, molding, and sintering. Among them, sintering is the most critical technical step for the porous green body to form a predetermined chemical composition and desired microstructure. In this process, high temperature is mainly relied on to provide a driving force for the sintering process of material densification and formation of a predetermined microstructure. The high temperature source may be fuel heat, electrical energy, microwave energy, or the like. In order t...

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Problems solved by technology

But the problem is that although this process improves the material performance, it still uses the lead element which is harmful to the environment. It is a non-environmentally coordinated material and does not meet the environmental protection requirements.

The main problems are: 1) The size of the currently used template seedlings is relatively large, so it is difficult to arrange an appropriate amount of templates in a specific direction in a uniform and equidistant manner in the sample body

Other methods that have been applied to high-temperature densification include microwave steering energy drive in the microwave sintering method, but there are no relevant reports on the technical principle and process of using external electric field force to affect the sintering and grain orientation growth process of polycrystalline ceramic materials.