Sodium niobate-based lead-free relaxation antiferroelectric energy storage ceramic capacitor and preparation method thereof: Fid-Bau Portal

Sodium niobate-based lead-free relaxation antiferroelectric energy storage ceramic capacitor and preparation method thereof

GUO YANYAN / FAN YI / ZHANG ZUO / HU HAIWEI / ZHAO JIANG

Abstract

The invention discloses a sodium niobate-based lead-free relaxation antiferroelectric energy storage ceramic capacitor, the chemical formula of the lead-free relaxation antiferroelectric energy storage ceramic is (1-x) [0.76 NaNbO3-0. 24 (Bi0. 5Na0. 5) TiO3]-xCaZrO3, x is the molar percentage, and the value of x satisfies the electric neutrality. The invention also discloses a preparation method of the sodium niobate-based lead-free relaxation antiferroelectric energy storage ceramic capacitor. According to the sodium niobate-based lead-free relaxation antiferroelectric energy storage ceramic capacitor and the preparation method thereof, CaZrO3 is introduced into 0.76 NaNbO3-0. 24 (Bi0. 5Na0. 5) TiO3, volatilization of Na < + > and Bi < 3 + > can be neutralized by adding CaZrO3, the antiferroelectric performance, the energy storage density and the energy storage efficiency of an NN system are further improved, and the service life of the capacitor is prolonged. The polarization intensity of the prepared sodium niobate-based lead-free relaxation antiferroelectric energy storage ceramic capacitor is 78 [mu] C/cm < 2 >, the energy storage density is 2.4 J/cm < 3 >, and the breakdown field strength is 215 kV/cm.

本发明公开了一种铌酸钠基无铅弛豫反铁电储能陶瓷电容器，所述无铅弛豫反铁电储能陶瓷的化学式为(1‑x)[0.76NaNbO3‑0.24(Bi0.5Na0.5)TiO3]‑xCaZrO3，其中x为摩尔百分比，x的取值满足电中性。本发明还公开一种铌酸钠基无铅弛豫反铁电储能陶瓷电容器制备方法。本发明提供的一种铌酸钠基无铅弛豫反铁电储能陶瓷电容器及其制备方法，通过在0.76NaNbO3‑0.24(Bi0.5Na0.5)TiO3中引入CaZrO3，能够通过加入CaZrO3来中和Na+和Bi3+的挥发，进一步的提高NN体系的反铁电性能，储能密度和储能效率，制备出的铌酸钠基无铅弛豫反铁电储能陶瓷电容器的极化强度为78μC/cm2，储能密度为2.4J/cm3，击穿场强为215kV/cm。

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