Preparation process of a high-performance piezoelectric ceramic

Abstract

The invention discloses a preparation process of high-performance piezoelectric ceramics, which comprises the following steps: 1) taking piezoelectric ceramic raw materials; 2) putting the piezoelectric ceramic raw materials into a ball mill tank to fully mix ball milling, and placing the slurry obtained after ball milling Dry in a drying oven to obtain a powder; 3) Add water to the powder, then add one or any combination of ammonia, citric acid or oxalic acid, and then heat for hydrothermal treatment, the hydrothermally treated powder drying to obtain a piezoelectric ceramic raw material powder; 4) treating the piezoelectric ceramic raw material powder obtained in step 3) with a traditional piezoelectric ceramic treatment process to obtain a high-performance piezoelectric ceramic. The invention has the characteristics of good performance of the prepared piezoelectric ceramics, less raw material consumption, low cost, less pollution, simpler process and good process stability.

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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