Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Lead-free piezoelectric ceramic material with high-temperature stable electrostrictive strain and preparation method of lead-free piezoelectric ceramic material
The invention discloses a lead-free piezoelectric ceramic material with high-temperature stable electrostrictive strain and a preparation method of the lead-free piezoelectric ceramic material. The chemical general formula of the lead-free piezoelectric ceramic material is (0.93-x) (Bi < 0.5 > Na < 0.5 >) TiO < 3-0.06 > BaTiO < 3-0.01 > (K < 0.5 > Na < 0.5 >) NbO < 3-x > SrTiO < 3 >, wherein x is equal to 0.02 to 0.1. The temperature change rate of the maximum electrostrictive strain and the normalized strain of the lead-free piezoelectric ceramic material between 25 DEG C and 120 DEG C is within 15%. Due to the excellent temperature stability, after solid solution of SrTiO3, the ferroelectric-relaxation transition temperature of the material can be reduced to be below room temperature, so that the adverse effect of phase change on the electrostrictive strain temperature stability of the material is remarkably suppressed.
本发明公开一种具有高温度稳定电致应变的无铅压电陶瓷材料及其制备方法。所述无铅压电陶瓷材料的化学通式为：(0.93‑x)(Bi0.5Na0.5)TiO3‑0.06BaTiO3‑0.01(K0.5Na0.5)NbO3‑xSrTiO3，其中x=0.02~0.1。所述无铅压电陶瓷材料在25‑120℃之间的最大电致应变和归一化应变的温度变化率在15%以内。上述优异的温度稳定性得利于SrTiO3固溶之后，能够将材料的铁电‑驰豫转变温度降低到室温以下，使得相变对材料电致应变温度稳定性的不利影响被显著压制。
Lead-free piezoelectric ceramic material with high-temperature stable electrostrictive strain and preparation method of lead-free piezoelectric ceramic material
The invention discloses a lead-free piezoelectric ceramic material with high-temperature stable electrostrictive strain and a preparation method of the lead-free piezoelectric ceramic material. The chemical general formula of the lead-free piezoelectric ceramic material is (0.93-x) (Bi < 0.5 > Na < 0.5 >) TiO < 3-0.06 > BaTiO < 3-0.01 > (K < 0.5 > Na < 0.5 >) NbO < 3-x > SrTiO < 3 >, wherein x is equal to 0.02 to 0.1. The temperature change rate of the maximum electrostrictive strain and the normalized strain of the lead-free piezoelectric ceramic material between 25 DEG C and 120 DEG C is within 15%. Due to the excellent temperature stability, after solid solution of SrTiO3, the ferroelectric-relaxation transition temperature of the material can be reduced to be below room temperature, so that the adverse effect of phase change on the electrostrictive strain temperature stability of the material is remarkably suppressed.
本发明公开一种具有高温度稳定电致应变的无铅压电陶瓷材料及其制备方法。所述无铅压电陶瓷材料的化学通式为：(0.93‑x)(Bi0.5Na0.5)TiO3‑0.06BaTiO3‑0.01(K0.5Na0.5)NbO3‑xSrTiO3，其中x=0.02~0.1。所述无铅压电陶瓷材料在25‑120℃之间的最大电致应变和归一化应变的温度变化率在15%以内。上述优异的温度稳定性得利于SrTiO3固溶之后，能够将材料的铁电‑驰豫转变温度降低到室温以下，使得相变对材料电致应变温度稳定性的不利影响被显著压制。
Lead-free piezoelectric ceramic material with high-temperature stable electrostrictive strain and preparation method of lead-free piezoelectric ceramic material
一种具有高温度稳定电致应变的无铅压电陶瓷材料及其制备方法
LIU ZHIFU (Autor:in) / SONG GUANHUA (Autor:in) / ZHANG FAQIANG (Autor:in) / LI YONGXIANG (Autor:in) / LIU FENG (Autor:in)
05.04.2022
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
| Europäisches Patentamt | 2020
| Europäisches Patentamt | 2022