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Polarization method of lithium-sodium niobate-based leadless piezoelectric ceramic
The invention discloses a polarization method of lithium sodium niobate-based leadless piezoelectric ceramic. The polarization method mainly comprises first polarization and second polarization. The preparation method comprises the following steps: putting sodium lithium niobate leadless piezoelectric ceramic into silicone oil, heating to a set temperature, keeping for a certain time under set polarization electric field intensity, and carrying out first polarization; performing cooling, taking out the ceramic sample, standing and putting into the silicone oil again; performing heating, keeping for a certain time under set polarization electric field intensity, carrying out secondary polarization, finally cooling, taking out the ceramic sample, removing surface silicone oil, and testing the piezoelectric property at room temperature (25 DEG C), so that experiments show that the piezoelectric constant can be increased to 115 pC/N from 60 pC/N of common polarization. Polarization conditions are reasonably selected, and the piezoelectric performance is improved by controlling the size and duration of a polarization electric field between electrodes of a piezoelectric ceramic sample during polarization and the environment and temperature of the sample; and by using the polarization method provided by the invention, the lithium sodium niobate-based leadless piezoelectric ceramic hasexcellent piezoelectric property.
本发明公布了一种铌酸锂钠基无铅压电陶瓷的极化方法，主要分为第一次极化和第二次极化；将铌酸锂钠无铅压电陶瓷放入硅油中，升温至设定温度，在设定的极化电场强度下保持一定时间，进行第一次极化；随后降温取出陶瓷样品静置后再次放入硅油中，升温加热，在设定的极化电场强度下保持一定时间，进行第二次极化，最后降温取出去除表面硅油，在室温(25℃)下测试其压电性能，实验表明，其压电常数能从普通极化的60pC/N提升至115pC/N。本发明合理选择极化条件，通过控制极化时压电陶瓷样品电极间的极化电场大小和时长，以及样品所处环境及温度，来提升压电性能；使用本发明的极化方法，可以让铌酸锂钠基无铅压电陶瓷具有优异的压电性能。
Polarization method of lithium-sodium niobate-based leadless piezoelectric ceramic
The invention discloses a polarization method of lithium sodium niobate-based leadless piezoelectric ceramic. The polarization method mainly comprises first polarization and second polarization. The preparation method comprises the following steps: putting sodium lithium niobate leadless piezoelectric ceramic into silicone oil, heating to a set temperature, keeping for a certain time under set polarization electric field intensity, and carrying out first polarization; performing cooling, taking out the ceramic sample, standing and putting into the silicone oil again; performing heating, keeping for a certain time under set polarization electric field intensity, carrying out secondary polarization, finally cooling, taking out the ceramic sample, removing surface silicone oil, and testing the piezoelectric property at room temperature (25 DEG C), so that experiments show that the piezoelectric constant can be increased to 115 pC/N from 60 pC/N of common polarization. Polarization conditions are reasonably selected, and the piezoelectric performance is improved by controlling the size and duration of a polarization electric field between electrodes of a piezoelectric ceramic sample during polarization and the environment and temperature of the sample; and by using the polarization method provided by the invention, the lithium sodium niobate-based leadless piezoelectric ceramic hasexcellent piezoelectric property.
本发明公布了一种铌酸锂钠基无铅压电陶瓷的极化方法，主要分为第一次极化和第二次极化；将铌酸锂钠无铅压电陶瓷放入硅油中，升温至设定温度，在设定的极化电场强度下保持一定时间，进行第一次极化；随后降温取出陶瓷样品静置后再次放入硅油中，升温加热，在设定的极化电场强度下保持一定时间，进行第二次极化，最后降温取出去除表面硅油，在室温(25℃)下测试其压电性能，实验表明，其压电常数能从普通极化的60pC/N提升至115pC/N。本发明合理选择极化条件，通过控制极化时压电陶瓷样品电极间的极化电场大小和时长，以及样品所处环境及温度，来提升压电性能；使用本发明的极化方法，可以让铌酸锂钠基无铅压电陶瓷具有优异的压电性能。
Polarization method of lithium-sodium niobate-based leadless piezoelectric ceramic
一种铌酸锂钠基无铅压电陶瓷的极化方法
WANG KE (author) / LI-CHEN BOWEN (author) / LI JINGFENG (author) / YU SHENGPING (author) / GAO HONGWEI (author) / ZHANG DANYANG (author) / GONG WEN (author) / WU CHAOFENG (author) / LI GENG (author)
2020-11-06
Patent
Electronic Resource
Chinese
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