Preparation of potassium-sodium niobate-based ceramic and application of potassium-sodium niobate-based ceramic in buzzer

Abstract

The invention discloses preparation of potassium-sodium niobate-based ceramic and application of the potassium-sodium niobate-based ceramic in a buzzer. The chemical formula of the potassium-sodium niobate-based ceramic is 0.97 (K < 0.48 > Na < 0.52 >) (Nb < 0.97 > Sb < 0.03 >) O < 3 >-0.03 Bi < 0.5 > Na < 0.5 > ZrO < 3 >. The potassium-sodium niobate-based ferroelectric ceramic has the beneficial effects that the potassium-sodium niobate-based ferroelectric ceramic is prepared by adopting a traditional solid-phase sintering method, Sb < 3 + > and Bi < 0.5 > Na < 0.5 > ZrO < 3 > are jointly added, so that a ceramic crystal structure is distorted, the potassium-sodium niobate-based ferroelectric ceramic with excellent electrical properties under a room-temperature condition is successfully prepared, the ceramic material can generate maximum polarization Pmax of 31.19 mu C / cm < 2 > and residual polarization Pr of 14.81 mu C / cm < 2 > under an electric field of 60kV / cm, and the potassium-sodium niobate-based ferroelectric ceramic has excellent electrical properties. And the film has better monopole strain capacity and dielectric property, and meets the performance requirements of mosquito dispeller and buzzer.

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