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Piezoelectric ceramic with high piezoelectric constant and low strong field dielectric loss and preparation method thereof
The invention discloses a piezoelectric ceramic and a preparation method thereof, and aims to provide a piezoelectric ceramic with high piezoelectric constant and low strong field dielectric loss and a preparation method thereof. The structural general formula of the piezoelectric ceramic is Pb (ZrzTi1-z) x (Co1/3Nb2/3) y (Mn1/3Nb2/3) 1-x-yO3 + nwt% A, x is equal to 0.85-0.95, y is equal to 0.01-0.06, z is equal to 0.45-0.55, n is equal to 0.1-1, A is an oxide of a modified element, and the modified element is one or more of Mg, Al and Yb. The method comprises the following steps: weighing Pb3O4, ZrO2, TiO2, Co2O3, Nb2O5, MnO2 and a modified element oxide A according to a chemical ratio, adding water, carrying out ball milling, and drying to obtain a primary grinding material; pre-sintering the primary grinding material; carrying out ball milling on the pre-sintered material again, and drying to obtain ceramic powder; uniformly mixing the ceramic powder with polyvinyl alcohol, granulating, tabletting and forming to obtain a ceramic blank; sintering the ceramic body to obtain a ceramic chip; coating the ceramic chip with silver; and the silver-coated ceramic chip is subjected to polarization treatment. The piezoelectric ceramic disclosed by the invention can completely meet the performance requirements of ultrasonic welding and ultrasonic flaw detection transducers on the piezoelectric ceramic.
本发明公开了一种压电陶瓷及制备方法，旨在提供一种高压电常数、低强场介电损耗压电陶瓷及其制备方法。本发明压电陶瓷结构通式为：Pb(ZrzTi1‑z)x(Co1/3Nb2/3)y(Mn1/3Nb2/3)1‑x‑yO3+nwt％A，x＝0.85～0.95、y＝0.01～0.06、z＝0.45～0.55、n＝0.1～1，A为改性元素的氧化物，所述改性元素为Mg、Al、Yb中的一种或几种。本发明方法是：将Pb3O4、ZrO2、TiO2、Co2O3、Nb2O5、MnO2和改性元素氧化物A按化学比例称量，加水球磨、烘干得一次磨料；预烧一次磨料；预烧料再次球磨、烘干，得陶瓷粉料；将所述陶瓷粉料与聚乙烯醇混合均匀、造粒、压片成型，得瓷坯；烧结该瓷坯得瓷片；瓷片被银；该被银陶瓷片极化处理。本发明压电陶瓷完全能够满足超声焊接和超声探伤换能器对压电陶瓷的性能要求。
Piezoelectric ceramic with high piezoelectric constant and low strong field dielectric loss and preparation method thereof
The invention discloses a piezoelectric ceramic and a preparation method thereof, and aims to provide a piezoelectric ceramic with high piezoelectric constant and low strong field dielectric loss and a preparation method thereof. The structural general formula of the piezoelectric ceramic is Pb (ZrzTi1-z) x (Co1/3Nb2/3) y (Mn1/3Nb2/3) 1-x-yO3 + nwt% A, x is equal to 0.85-0.95, y is equal to 0.01-0.06, z is equal to 0.45-0.55, n is equal to 0.1-1, A is an oxide of a modified element, and the modified element is one or more of Mg, Al and Yb. The method comprises the following steps: weighing Pb3O4, ZrO2, TiO2, Co2O3, Nb2O5, MnO2 and a modified element oxide A according to a chemical ratio, adding water, carrying out ball milling, and drying to obtain a primary grinding material; pre-sintering the primary grinding material; carrying out ball milling on the pre-sintered material again, and drying to obtain ceramic powder; uniformly mixing the ceramic powder with polyvinyl alcohol, granulating, tabletting and forming to obtain a ceramic blank; sintering the ceramic body to obtain a ceramic chip; coating the ceramic chip with silver; and the silver-coated ceramic chip is subjected to polarization treatment. The piezoelectric ceramic disclosed by the invention can completely meet the performance requirements of ultrasonic welding and ultrasonic flaw detection transducers on the piezoelectric ceramic.
本发明公开了一种压电陶瓷及制备方法，旨在提供一种高压电常数、低强场介电损耗压电陶瓷及其制备方法。本发明压电陶瓷结构通式为：Pb(ZrzTi1‑z)x(Co1/3Nb2/3)y(Mn1/3Nb2/3)1‑x‑yO3+nwt％A，x＝0.85～0.95、y＝0.01～0.06、z＝0.45～0.55、n＝0.1～1，A为改性元素的氧化物，所述改性元素为Mg、Al、Yb中的一种或几种。本发明方法是：将Pb3O4、ZrO2、TiO2、Co2O3、Nb2O5、MnO2和改性元素氧化物A按化学比例称量，加水球磨、烘干得一次磨料；预烧一次磨料；预烧料再次球磨、烘干，得陶瓷粉料；将所述陶瓷粉料与聚乙烯醇混合均匀、造粒、压片成型，得瓷坯；烧结该瓷坯得瓷片；瓷片被银；该被银陶瓷片极化处理。本发明压电陶瓷完全能够满足超声焊接和超声探伤换能器对压电陶瓷的性能要求。
Piezoelectric ceramic with high piezoelectric constant and low strong field dielectric loss and preparation method thereof
高压电常数、低强场介电损耗压电陶瓷及制备方法
CHU TAO (Autor:in) / WANG SHIHAI (Autor:in) / ZHANG YUANSONG (Autor:in) / HE JING (Autor:in) / WANG LANHUA (Autor:in) / QIN JIE (Autor:in)
12.11.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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