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Lead-free pyroelectric ceramic material with high depolarization temperature as well as preparation method and application of lead-free pyroelectric ceramic material
The invention belongs to the technical field of pyroelectric infrared detection, and particularly provides a lead-free pyroelectric ceramic material with high depolarization temperature, and the chemical composition of the lead-free pyroelectric ceramic material is 0.99 Bi < x > Na < y > TiO < 3 >-0.01 BaTiO < 3 >, wherein x and y are mole percent, and x/y is equal to (0.4-0.5)/(0.5-0.6). A small amount of BaTiO3 is added into BixNayTiO3, the contents of Na and Bi are adjusted, a small amount of Ba < 2 + > is introduced to enable crystal lattices of the BixNayTiO3 to form a stable R3c rhombohedral phase structure, Bi < 3 + > and Na < + > ions are volatilized to form defects, so that the conductivity of the material is improved, the material is easier to polarize, and the room-temperature pyroelectric coefficient of the material is greatly improved under the condition that the depolarization temperature is not greatly changed.
本发明属于热释电红外探测技术领域，具体提供了一种高退极化温度的无铅热释电陶瓷材料，所述无铅热释电陶瓷材料的化学组成为：0.99BixNayTiO3‑0.01BaTiO3；其中x、y为摩尔百分比，且x/y＝(0.4‑0.5)/(0.5‑0.6)。通过在BixNayTiO3中加入少量的BaTiO3并调整Na和Bi的含量，少量的Ba2+引入使其晶格形成稳定的R3c菱方相结构，Bi3+、Na+离子挥发形成缺陷导致材料的电导率提升，从而使其更容易极化，进而使材料在退极化温度变化不大的情况下室温热释电系数得到很大提升。
Lead-free pyroelectric ceramic material with high depolarization temperature as well as preparation method and application of lead-free pyroelectric ceramic material
The invention belongs to the technical field of pyroelectric infrared detection, and particularly provides a lead-free pyroelectric ceramic material with high depolarization temperature, and the chemical composition of the lead-free pyroelectric ceramic material is 0.99 Bi < x > Na < y > TiO < 3 >-0.01 BaTiO < 3 >, wherein x and y are mole percent, and x/y is equal to (0.4-0.5)/(0.5-0.6). A small amount of BaTiO3 is added into BixNayTiO3, the contents of Na and Bi are adjusted, a small amount of Ba < 2 + > is introduced to enable crystal lattices of the BixNayTiO3 to form a stable R3c rhombohedral phase structure, Bi < 3 + > and Na < + > ions are volatilized to form defects, so that the conductivity of the material is improved, the material is easier to polarize, and the room-temperature pyroelectric coefficient of the material is greatly improved under the condition that the depolarization temperature is not greatly changed.
本发明属于热释电红外探测技术领域，具体提供了一种高退极化温度的无铅热释电陶瓷材料，所述无铅热释电陶瓷材料的化学组成为：0.99BixNayTiO3‑0.01BaTiO3；其中x、y为摩尔百分比，且x/y＝(0.4‑0.5)/(0.5‑0.6)。通过在BixNayTiO3中加入少量的BaTiO3并调整Na和Bi的含量，少量的Ba2+引入使其晶格形成稳定的R3c菱方相结构，Bi3+、Na+离子挥发形成缺陷导致材料的电导率提升，从而使其更容易极化，进而使材料在退极化温度变化不大的情况下室温热释电系数得到很大提升。
Lead-free pyroelectric ceramic material with high depolarization temperature as well as preparation method and application of lead-free pyroelectric ceramic material
高退极化温度的无铅热释电陶瓷材料及其制备方法和应用
SHEN MENG (Autor:in) / PAN YANGSHENG (Autor:in) / CHEN YONG (Autor:in)
08.03.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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