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Low-loss BiFeO3-BaTiO3 high-temperature lead-free piezoelectric ceramic and preparation method thereof
The invention relates to a low-loss BiFeO3-BaTiO3 high-temperature lead-free piezoelectric ceramic and a preparation method thereof, aims to solve the technical problems of high dielectric loss, large leakage current and difficult polarization of the existing BiFeO3-BaTiO3 ceramic, and belongs to the technical field of inorganic nonmetallic materials. The doped BiFeO3-BaTiO3 ceramic is prepared by adopting a traditional solid-phase reaction method, the chemical formula of the doped BiFeO3-BaTiO3 ceramic is 0.68 BiFeO3-0. 32 BaTiO3 + x wt% MnO2, x is the mass percent of MnO2 in a compound, x is larger than or equal to 0.01 and smaller than or equal to 0.03, the material is simple in synthesis process, low in cost and low in room-temperature dielectric loss (tan delta-0. 045 under 1kHz), the ferroelectric-paraelectric phase change characteristic temperature Tm reaches up to 436 DEG C, the piezoelectric constant d33 reaches up to 133pC/N, and the dielectric constant d33 is larger than or equal to 130pC/N. The bismuth titanate K-15 ceramic prepared by the method has the advantages that the electrical property of the bismuth titanate K-15 ceramic is even higher than that of the commercial bismuth titanate K-15 ceramic (tan delta = 0.03, d33 = 18pC/N, and TC = 600 DEG C), and the bismuth titanate K-15 ceramic has huge application potential in the aspect of preparing high-temperature piezoelectric sensors.
本发明涉及一种低损耗BiFeO3‑BaTiO3高温无铅压电陶瓷及其制备方法，是要解决现有BiFeO3‑BaTiO3陶瓷的介电损耗高、漏电流大和极化困难的技术问题，属于无机非金属材料技术领域。本发明采用传统的固相反应法制备得到掺杂BiFeO3‑BaTiO3陶瓷，其化学式为0.68BiFeO3‑0.32BaTiO3+x wt％MnO2，其中x为化合物中MnO2的质量百分数，x的范围为0.01≤x≤0.03，该材料的合成工艺简单，成本低廉，室温介电损耗低(1kHz下tanδ～0.045)，铁电‑顺电相变特征温度Tm高达436℃，压电常数d33达133pC/N，电性能甚至高于目前商用钛酸铋系K‑15陶瓷(tanδ＝0.03、d33＝18pC/N、TC＝600℃)，在用于制备高温压电传感器方面具有巨大应用潜力。
Low-loss BiFeO3-BaTiO3 high-temperature lead-free piezoelectric ceramic and preparation method thereof
The invention relates to a low-loss BiFeO3-BaTiO3 high-temperature lead-free piezoelectric ceramic and a preparation method thereof, aims to solve the technical problems of high dielectric loss, large leakage current and difficult polarization of the existing BiFeO3-BaTiO3 ceramic, and belongs to the technical field of inorganic nonmetallic materials. The doped BiFeO3-BaTiO3 ceramic is prepared by adopting a traditional solid-phase reaction method, the chemical formula of the doped BiFeO3-BaTiO3 ceramic is 0.68 BiFeO3-0. 32 BaTiO3 + x wt% MnO2, x is the mass percent of MnO2 in a compound, x is larger than or equal to 0.01 and smaller than or equal to 0.03, the material is simple in synthesis process, low in cost and low in room-temperature dielectric loss (tan delta-0. 045 under 1kHz), the ferroelectric-paraelectric phase change characteristic temperature Tm reaches up to 436 DEG C, the piezoelectric constant d33 reaches up to 133pC/N, and the dielectric constant d33 is larger than or equal to 130pC/N. The bismuth titanate K-15 ceramic prepared by the method has the advantages that the electrical property of the bismuth titanate K-15 ceramic is even higher than that of the commercial bismuth titanate K-15 ceramic (tan delta = 0.03, d33 = 18pC/N, and TC = 600 DEG C), and the bismuth titanate K-15 ceramic has huge application potential in the aspect of preparing high-temperature piezoelectric sensors.
本发明涉及一种低损耗BiFeO3‑BaTiO3高温无铅压电陶瓷及其制备方法，是要解决现有BiFeO3‑BaTiO3陶瓷的介电损耗高、漏电流大和极化困难的技术问题，属于无机非金属材料技术领域。本发明采用传统的固相反应法制备得到掺杂BiFeO3‑BaTiO3陶瓷，其化学式为0.68BiFeO3‑0.32BaTiO3+x wt％MnO2，其中x为化合物中MnO2的质量百分数，x的范围为0.01≤x≤0.03，该材料的合成工艺简单，成本低廉，室温介电损耗低(1kHz下tanδ～0.045)，铁电‑顺电相变特征温度Tm高达436℃，压电常数d33达133pC/N，电性能甚至高于目前商用钛酸铋系K‑15陶瓷(tanδ＝0.03、d33＝18pC/N、TC＝600℃)，在用于制备高温压电传感器方面具有巨大应用潜力。
Low-loss BiFeO3-BaTiO3 high-temperature lead-free piezoelectric ceramic and preparation method thereof
一种低损耗BiFeO3-BaTiO3高温无铅压电陶瓷及其制备方法
LI CAIXIA (author) / LIN JIAQI (author) / CHEN CHUNTIAN (author) / WANG WANRU (author) / LIU YIFAN (author) / WANG ZEYU (author)
2022-06-28
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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