Preparation method of potassium sodium niobate based piezoelectric ceramics

A potassium-sodium niobate-based, piezoelectric ceramic technology, applied in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., can solve the problems of poor preparation process, easy volatilization, narrow sintering temperature, etc. To achieve the effect of improving electrical performance
CN107512908AInactive Publication Date: 2017-12-26KUNMING UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
KUNMING UNIV OF SCI & TECH
Publication Date
2017-12-26
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention relates to a preparation method of potassium sodium niobate based piezoelectric ceramics, and belongs to the field of novel lead-free based functional ceramics. The method is characterized in that the solid solubility between potassium niobate and sodium niobate in the potassium sodium niobate based piezoelectric ceramics is increased to improve the electric properties of the potassium sodium niobate based piezoelectric ceramics; and the potassium sodium niobate based piezoelectric ceramics comprise the following raw materials in mol percentage: 48-52% of K2CO3, 48-52% of Na2CO3, 96-100% of Nb2O5 and 0-4% of Sb2O3. The method provided by the invention can effectively regulate and control the phase structure and the microscopic morphology of the potassium sodium niobate based piezoelectric ceramics, thereby improving the electric properties of the potassium sodium niobate based piezoelectric ceramics.
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Description

technical field

[0001] The invention relates to a preparation method of potassium sodium niobate-based piezoelectric ceramics, belonging to the field of novel lead-free based functional ceramics. Background technique

[0002] Piezoelectric ceramics are a class of important functional materials that can realize mutual conversion of mechanical energy and electrical energy, and have been widely used in the fields of sensors, drives, transducers, non-destructive testing and communication technology. Lead-based piezoelectric ceramics, mainly lead zirconate titanate (PZT), occupy a dominant position in the world piezoelectric material market, but the content of lead oxide as high as 60% brings serious harm to human beings and the ecological environment. Therefore, the development and exploration of lead-free piezoelectric ceramic materials with excellent performance has become a research hotspot of scholars from all over the world. Potassium sodium niobate (KNN) piezoelectric cer...

Claims

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