Materials and method used for preparing calcium aluminum titanate electronic functional ceramic using laser

Abstract

The invention discloses materials and a method used for preparing calcium aluminum titanate electronic functional ceramic using laser. The preparation method comprises following steps: calcium carbonate, aluminum carbonate, and titanium dioxide are taken according to a molar ratio of (1-x):x:1, are mixed and dried, are subjected to dry grinding using a ball miller for 2h, and are subjected to wet grinding for 3h after adding of an appropriate amount of deionized water; an obtained mixture is collected and are dried; a binder is added for plasticization and granulation, an obtained material is subjected to pressed compact under a pressure of 35MPa, and the pressure is maintained for 8min; obtained green body is dried for 2h at a temperature of 70 DEG C, is dried for 5h at a temperature of 250 DEG C, and is subjected to furnace cooling; an obtained sample is collected, and is subjected to sintering using broadband carbon dioxide laser directly so as to obtain the calcium aluminum titanate electronic functional ceramic; wherein x is used for representing molar mass fraction, and 0

Description

technical field [0001] The invention relates to a material and a method for preparing calcium-aluminum titanate electronic functional ceramics by laser, and belongs to the technical field of preparation of electronic functional ceramics. Background technique [0002] Calcium-aluminum titanate is a complete solid solution of calcium titanate and aluminum titanate, and its continuous solid solution allows the dielectric and optical properties of the material to be continuously adjusted within the range of calcium / aluminum ratio, which is useful in the application field of electronic components. very important meaning. At present, the preparation methods of electronic functional ceramics mainly include solid-phase sintering method and liquid-phase sintering method, but both of these two preparation methods have their own shortcomings: it is difficult to achieve molecular-level mixing of products by solid-phase sintering method, and the obtained ceramic components are finished p...

AI Technical Summary

Problems solved by technology

At present, the preparation methods of electronic functional ceramics are mainly solid-phase sintering method and liquid-phase sintering method, but these two preparation methods have their own shortcomings: the solid-phase sintering method is difficult to achieve molecular-level mixing, and the finished ceramic components obtained Low efficiency, poor pressure resistance, large ceramic grains, pores and other defects; liquid phase sintering process is long, easy to cause environmental pollution, easy to agglomerate powder, expensive raw materials, and requires higher temperature and higher pressure, large investment in equipment, etc.

However, at present, narrow-band lasers are mainly used in China to prepare electronic functional ceramics. The disadvantage is that the sintering width is narrow, only 1-3mm. During the laser sintering process, the green compact is easily cracked due to the large temperature gradient, making it difficult to sinter the green compact into rows.