Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The invention provides bismuth calcium niobate-based bismuth layered structure ferroelectric piezoelectric ceramic and a preparation method thereof, and belongs to the technical field of piezoelectric ceramic materials. The general chemical formula of the ferroelectric piezoelectric ceramic material is Ca (1-x-y-z) (Li0. 5Bi0. 4Ce0. 1) xSryBazBi2Nb2O9, x is greater than or equal to 0 and less than or equal to 0.4, y is greater than or equal to 0 and less than or equal to 0.2, and z is greater than or equal to 0 and less than or equal to 0.2. According to the bismuth calcium bismuth niobate layered structure piezoelectric ceramic material, A-site doping is carried out only by adopting ions of different sizes at the same time, a traditional solid phase method is adopted, the doping mode is simple and effective, the preparation cost is low, and batch production can be achieved. The bismuth calcium bismuth niobate layered structure piezoelectric ceramic material has excellent and stable comprehensive electrical properties in a high-temperature environment (greater than 500 DEG C): when x = 0.2, y = 0.1 and z = 0.1, d33 of a sample is 23.8 pC/N, after annealing at 900 DEG C for 2 hours, d33 is 22.5 pC/N and is still 94.5% of that at room temperature, and the piezoelectric ceramic material has relatively high piezoelectricity and temperature stability; the volume resistivity at 600 DEG C is equal to 2.4 * 10 < 6 > omega.cm; the Curie temperature is still kept high, Tc is equal to 917 DEG C, and the excellent and stable electrical properties of the material have practical application value in the field of high-temperature piezoelectric devices.
本发明提供了一种铌酸铋钙基铋层状结构铁电压电陶瓷及其制备方法，属于压电陶瓷材料技术领域。该铁电压电陶瓷材料的化学通式为：Ca(1‑x‑y‑z)(Li0.5Bi0.4Ce0.1)xSryBazBi2Nb2O9，其中，0≤x≤0.4，0≤y≤0.2，0≤z≤0.2。本发明的铌酸铋钙铋层状结构压电陶瓷材料仅采用不同尺寸的离子同时进行A位掺杂，且采用传统固相法，掺杂方式简单有效，制备成本低，且可批量生产。该铌酸铋钙铋层状结构压电陶瓷材料在高温环境下(＞500℃)拥有优异且稳定的综合电学性能：当x＝0.2、y＝0.1、z＝0.1时，样品的d33＝23.8pC/N，在900℃退火2h后d33＝22.5pC/N，仍是室温下的94.5％，具有较高的压电性及温度稳定性；在600℃时的体电阻率＝2.4×106Ω·cm；居里温度仍保持较高温度，Tc＝917℃，其优异且稳定的电学性能在高温压电器件领域具有实际应用价值。
The invention provides bismuth calcium niobate-based bismuth layered structure ferroelectric piezoelectric ceramic and a preparation method thereof, and belongs to the technical field of piezoelectric ceramic materials. The general chemical formula of the ferroelectric piezoelectric ceramic material is Ca (1-x-y-z) (Li0. 5Bi0. 4Ce0. 1) xSryBazBi2Nb2O9, x is greater than or equal to 0 and less than or equal to 0.4, y is greater than or equal to 0 and less than or equal to 0.2, and z is greater than or equal to 0 and less than or equal to 0.2. According to the bismuth calcium bismuth niobate layered structure piezoelectric ceramic material, A-site doping is carried out only by adopting ions of different sizes at the same time, a traditional solid phase method is adopted, the doping mode is simple and effective, the preparation cost is low, and batch production can be achieved. The bismuth calcium bismuth niobate layered structure piezoelectric ceramic material has excellent and stable comprehensive electrical properties in a high-temperature environment (greater than 500 DEG C): when x = 0.2, y = 0.1 and z = 0.1, d33 of a sample is 23.8 pC/N, after annealing at 900 DEG C for 2 hours, d33 is 22.5 pC/N and is still 94.5% of that at room temperature, and the piezoelectric ceramic material has relatively high piezoelectricity and temperature stability; the volume resistivity at 600 DEG C is equal to 2.4 * 10 < 6 > omega.cm; the Curie temperature is still kept high, Tc is equal to 917 DEG C, and the excellent and stable electrical properties of the material have practical application value in the field of high-temperature piezoelectric devices.
本发明提供了一种铌酸铋钙基铋层状结构铁电压电陶瓷及其制备方法，属于压电陶瓷材料技术领域。该铁电压电陶瓷材料的化学通式为：Ca(1‑x‑y‑z)(Li0.5Bi0.4Ce0.1)xSryBazBi2Nb2O9，其中，0≤x≤0.4，0≤y≤0.2，0≤z≤0.2。本发明的铌酸铋钙铋层状结构压电陶瓷材料仅采用不同尺寸的离子同时进行A位掺杂，且采用传统固相法，掺杂方式简单有效，制备成本低，且可批量生产。该铌酸铋钙铋层状结构压电陶瓷材料在高温环境下(＞500℃)拥有优异且稳定的综合电学性能：当x＝0.2、y＝0.1、z＝0.1时，样品的d33＝23.8pC/N，在900℃退火2h后d33＝22.5pC/N，仍是室温下的94.5％，具有较高的压电性及温度稳定性；在600℃时的体电阻率＝2.4×106Ω·cm；居里温度仍保持较高温度，Tc＝917℃，其优异且稳定的电学性能在高温压电器件领域具有实际应用价值。
Bismuth calcium niobate-based bismuth layered structure ferroelectric piezoelectric ceramic and preparation method thereof
一种铌酸铋钙基铋层状结构铁电压电陶瓷及其制备方法
03.05.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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