Preparation process of high-performance piezoelectric ceramic

Abstract

The invention discloses a preparation process of a high-performance piezoelectric ceramic. The process comprises the following steps of (1) taking a piezoelectric ceramic raw material; (2) charging the piezoelectric ceramic raw material into a ball milling tank for sufficient mixing and ball milling; then, putting the slurry obtained after the ball milling into a drying box to be dried so as to obtain powder; (3) adding water into powder; then, adding any one or several kind of materials inof ammonium hydroxide, lemon acid or oxalic acid or a composition of several kinds of materials from ammonium hydroxide, lemon acid or oxalic acid; then, performing heating for hydrothermal treatment; drying the powder after the hydrothermal treatment; obtaining to obtain the piezoelectric ceramic raw material powder; (4) treating the piezoelectric ceramic raw material powder obtained in step (3) by a conventional piezoelectric ceramic treatment process to obtain the high-performance piezoelectric ceramic. The preparation process has the characteristics that the prepared piezoelectric ceramic has good performance; the raw material consumption is low; the cost is low; the pollution is low; the process is simple; the process stability is high.

Description

technical field [0001] The invention relates to a method for processing ceramic dopant materials, in particular to a preparation process for high-performance piezoelectric ceramics. Background technique [0002] Piezoelectric ceramics are information functional ceramic materials that can convert mechanical energy and electrical energy into each other. Piezoelectric ceramics are made by using their materials under the action of mechanical stress to cause the relative displacement of the internal positive and negative charge centers to cause polarization, resulting in the appearance of bound charges with opposite signs on the surface of the material, that is, the piezoelectric effect. It has sensitive characteristics. Ceramics are mainly used in the manufacture of ultrasonic transducers, underwater acoustic transducers, electroacoustic transducers, ceramic filters, ceramic transformers, ceramic discriminators, high voltage generators, infrared detectors, surface acoustic wave ...

AI Technical Summary

Problems solved by technology

But, present present hydrothermal method still has defect, mainly reflects in: 1, present present hydrothermal method must utilize the soluble salt (mainly nitrate) of raw material to be raw material, react with alkali, finally make oxide compound, But the price of soluble salt is much more expensive than the price of oxide, which increases the raw material cost of ceramics; Nitrate-zirconium nitrate pentahydrate is example, zirconium dioxide is 29% after the treatment is completed, and all the other 71% are nitrate radicals and water of crystallization), therefore, need a large amount of soluble salts and alkali to react when preparing oxide, further increased The cost of raw materials for ceramics. At the same time, the waste liquid contains a large amount of acid radicals, which pollutes the environment. 3. The reaction system of soluble salts and alkalis is more complicated and the conditions are more stringent. It is difficult to grasp the stability of the process during the treatment process.

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