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Preparation method of potassium-sodium niobate ceramic with high piezoelectric property and high remnant polarization strength
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.
本发明公开了一种具有高压电性能和高剩余极化强度的铌酸钾钠陶瓷及其制备方法。所述无铅压电陶瓷化学通式为：(Na0.5K0.5)NbO3。本发明利用一种5mm和2mm氧化锆球(质量比为1∶2)球磨珠混合球磨方式，采用固相法制备的铌酸钾钠无铅压电陶瓷具有较高的压电常数d33、平面机电耦合系数Kp和微观致密度，其压电常数可达124pC/N，相对密度可达到95.5％。同时该陶瓷的剩余极化强度为23μC/cm2，高于文献里报道的利用传统固相法制备陶瓷(10～15μC/cm2)。该发明对利用传统固相法制备高性能的无铅铌酸钾钠基压电陶瓷具有重要指导意义。
Preparation method of potassium-sodium niobate ceramic with high piezoelectric property and high remnant polarization strength
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.
本发明公开了一种具有高压电性能和高剩余极化强度的铌酸钾钠陶瓷及其制备方法。所述无铅压电陶瓷化学通式为：(Na0.5K0.5)NbO3。本发明利用一种5mm和2mm氧化锆球(质量比为1∶2)球磨珠混合球磨方式，采用固相法制备的铌酸钾钠无铅压电陶瓷具有较高的压电常数d33、平面机电耦合系数Kp和微观致密度，其压电常数可达124pC/N，相对密度可达到95.5％。同时该陶瓷的剩余极化强度为23μC/cm2，高于文献里报道的利用传统固相法制备陶瓷(10～15μC/cm2)。该发明对利用传统固相法制备高性能的无铅铌酸钾钠基压电陶瓷具有重要指导意义。
Preparation method of potassium-sodium niobate ceramic with high piezoelectric property and high remnant polarization strength
一种具有高压电性能和高剩余极化强度铌酸钾钠陶瓷的制备方法
GAO DAQIANG (Autor:in) / ZHANG SHUGUANG (Autor:in) / LIAO ZHONGXIN (Autor:in)
26.03.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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