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High-piezoelectric-property and high-stability anti-reduction potassium-sodium niobate-based leadless piezoelectric ceramic and preparation method thereof
The invention discloses a high-piezoelectric property and high-stability anti-reduction potassium-sodium niobate-based leadless piezoelectric ceramic and a preparation method thereof. The chemical formula of the piezoelectric ceramic is as follows: (1-x)[(1-y)K0.5Na0.5Nb<1-z>TaO<3-y>Bi0.5(Na0.82K0.18)0.5ZrO3]-xCaZrO<3+k%>M, wherein x, y, z and k represent molar fractions, x is greater than or equal to 0 and less than or equal to 0.03, y is greater than or equal to 0.02 and less than or equal to 0.05, z is greater than or equal to 0 and less than or equal to 0.12, k is greater than or equalto 0.2 and less than or equal to 0.6, x, y and z are not zero at the same time, and m represents a manganese compound. According to the anti-reduction potassium-sodium niobate-based leadless piezoelectric ceramic provided by the invention, the piezoelectric constant d33 reaches 275 pC/N or above, the planar electromechanical coupling coefficient kp can reach 0.50, the ceramic strain can reach 0.20% in a 50 kV/cm electric field, and the maximum inverse piezoelectric constant d33* reaches 500 pm/V (E = 25 kV/cm). Under a 35kV/cm electric field, the d33* of a sample at room temperature is equal to 460pm/V, and the temperature Te of the inverse piezoelectric coefficient d33* is stabilized within 125 DEG C within the fluctuation range of +/-10%.
本发明公开了一种高压电性能和高稳定型抗还原铌酸钾钠基无铅压电陶瓷及其制备方法。所述压电陶瓷的化学式如下：(1‑x)[(1‑y)KNaNbTaO‑yBi(NaK)ZrO]‑xCaZrO+k％M；其中，x、y、z和k表示摩尔分数，0≤x≤0.03，0.02≤y≤0.05，0≤z≤0.12，0.2≤k≤0.6，且x、y和z不同时为零；M表示锰化合物。本发明提供的抗还原型铌酸钾钠基无铅压电陶瓷，压电常数d达275pC/N以上，平面机电耦合系数k可达0.50，在50kV/cm电场下，陶瓷应变可达0.20％，最大逆压电常数d达到500pm/V(E＝25kV/cm)。在35kV/cm电场下，样品室温d＝460pm/V，并且在波动为±10％范围内，逆压电系数d的温度稳定在Te＝125℃之内。
High-piezoelectric-property and high-stability anti-reduction potassium-sodium niobate-based leadless piezoelectric ceramic and preparation method thereof
The invention discloses a high-piezoelectric property and high-stability anti-reduction potassium-sodium niobate-based leadless piezoelectric ceramic and a preparation method thereof. The chemical formula of the piezoelectric ceramic is as follows: (1-x)[(1-y)K0.5Na0.5Nb<1-z>TaO<3-y>Bi0.5(Na0.82K0.18)0.5ZrO3]-xCaZrO<3+k%>M, wherein x, y, z and k represent molar fractions, x is greater than or equal to 0 and less than or equal to 0.03, y is greater than or equal to 0.02 and less than or equal to 0.05, z is greater than or equal to 0 and less than or equal to 0.12, k is greater than or equalto 0.2 and less than or equal to 0.6, x, y and z are not zero at the same time, and m represents a manganese compound. According to the anti-reduction potassium-sodium niobate-based leadless piezoelectric ceramic provided by the invention, the piezoelectric constant d33 reaches 275 pC/N or above, the planar electromechanical coupling coefficient kp can reach 0.50, the ceramic strain can reach 0.20% in a 50 kV/cm electric field, and the maximum inverse piezoelectric constant d33* reaches 500 pm/V (E = 25 kV/cm). Under a 35kV/cm electric field, the d33* of a sample at room temperature is equal to 460pm/V, and the temperature Te of the inverse piezoelectric coefficient d33* is stabilized within 125 DEG C within the fluctuation range of +/-10%.
本发明公开了一种高压电性能和高稳定型抗还原铌酸钾钠基无铅压电陶瓷及其制备方法。所述压电陶瓷的化学式如下：(1‑x)[(1‑y)KNaNbTaO‑yBi(NaK)ZrO]‑xCaZrO+k％M；其中，x、y、z和k表示摩尔分数，0≤x≤0.03，0.02≤y≤0.05，0≤z≤0.12，0.2≤k≤0.6，且x、y和z不同时为零；M表示锰化合物。本发明提供的抗还原型铌酸钾钠基无铅压电陶瓷，压电常数d达275pC/N以上，平面机电耦合系数k可达0.50，在50kV/cm电场下，陶瓷应变可达0.20％，最大逆压电常数d达到500pm/V(E＝25kV/cm)。在35kV/cm电场下，样品室温d＝460pm/V，并且在波动为±10％范围内，逆压电系数d的温度稳定在Te＝125℃之内。
High-piezoelectric-property and high-stability anti-reduction potassium-sodium niobate-based leadless piezoelectric ceramic and preparation method thereof
一种高压电性能和高稳定型抗还原铌酸钾钠基无铅压电陶瓷及其制备方法
WANG XIAOHUI (Autor:in) / CEN ZHENYONG (Autor:in) / LI LONGTU (Autor:in)
10.07.2020
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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