Preparation method of potassium-sodium niobate ceramic with high piezoelectric property and high remnant polarization strength

A polarization strength and potassium sodium niobate technology, which is applied in the field of perovskite lead-free piezoelectric ceramics, can solve the problems of low remanent polarization, low density and poor piezoelectric performance of potassium sodium niobate ceramics
CN112552048AActive Publication Date: 2021-03-26AUDIOWELL ELECTRONICS GUANGDONG +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
AUDIOWELL ELECTRONICS GUANGDONG
Publication Date
2021-03-26

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Abstract

The invention discloses a potassium-sodium niobate ceramic with high piezoelectric property and high remnant polarization strength and a preparation method of the potassium-sodium niobate ceramic. Thegeneral chemical formula of the lead-free piezoelectric ceramic is (Na0.5K0.5)NbO3. The potassium-sodium niobate leadless piezoelectric ceramic prepared by a solid-phase method has a high piezoelectric constant d33, a high planar electromechanical coupling coefficient Kp and high microcosmic density, the piezoelectric constant of the ceramic can reach 124 pC / N, and the relative density of the ceramic can reach 95.5% by using a ball-milling bead mixed ball-milling mode of zirconium oxide balls of 5 mm and 2 mm (the mass ratio is 1: 2). Meanwhile, the remnant polarization intensity of the ceramic is 23 mu C / cm<2> and is higher than that of ceramic (10-15 mu C / cm<2>) prepared by a traditional solid-phase method reported in literature. The method has important guiding significance for preparing the high-performance lead-free potassium-sodium niobate-based piezoelectric ceramic by utilizing a traditional solid-phase method.
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Description

technical field

[0001] The invention belongs to the technical field of perovskite-type lead-free piezoelectric ceramics, and in particular relates to a preparation method of potassium sodium niobate ceramics with high voltage electrical properties and high remnant polarization strength. Background technique

[0002] Because piezoelectric ceramics can realize the mutual conversion function of mechanical energy and electric energy, and are convenient for manufacturing various functional components with low loss, high reliability, and miniaturization, they are widely used in various fields of national daily production and life, such as Transducers, sensors, drives, etc. At present, the mainstream material of piezoelectric ceramic devices on the market is lead-based lead zirconate titanate (PZT) material. The heavy metal element lead contained in this lead-based material is extremely harmful to many organisms and the environment including humans. Many countries have introduced ...

Claims

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