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Method for reducing leakage current of bismuth ferrite-barium titanate piezoelectric ceramic and improving high-temperature resistivity of bismuth ferrite-barium titanate piezoelectric ceramic
The invention relates to a method for reducing the leakage current of bismuth ferrite-barium titanate piezoelectric ceramic and improving the high-temperature resistivity of the bismuth ferrite-barium titanate piezoelectric ceramic, which comprises the following steps: (1) taking Fe2O3 powder, Bi2O3 powder, BaCO3 powder and TiO2 powder as raw materials, weighing and mixing according to the stoichiometric ratio (1-x) BiFeO3-xBaTiO3 of the bismuth ferrite-barium titanate piezoelectric ceramic, and synthesizing, granulating and forming to obtain a ceramic biscuit; (2) removing plastic from the obtained ceramic biscuit, firstly heating to T1, then cooling to T2, and keeping the temperature for 5-20 hours, thereby reducing the leakage current of the bismuth ferrite-barium titanate piezoelectric ceramic and improving the resistivity; wherein T1 ranges from 950 DEG C to 1100 DEG C, T2 ranges from 750 DEG C to 950 DEG C, and T1 is larger than T2.
本发明涉及一种降低铁酸铋‑钛酸钡压电陶瓷漏电流以及提高其高温电阻率的方法，包括：（1）以Fe2O3粉体、Bi2O3粉体、BaCO3粉体、TiO2粉体为原料，按照铁酸铋‑钛酸钡压电陶瓷的化学计量比(1‑x)BiFeO3‑xBaTiO3称取并混合，再经合成、造粒和成型，得到陶瓷素坯；（2）将所得陶瓷素坯经排塑后，先升温至T1再降温至T2并保温5～20小时，从而降低铁酸铋‑钛酸钡压电陶瓷漏电流以及提高电阻率；其中，T1=950～1100℃，T2=750～950℃，且T1＞T2。
Method for reducing leakage current of bismuth ferrite-barium titanate piezoelectric ceramic and improving high-temperature resistivity of bismuth ferrite-barium titanate piezoelectric ceramic
The invention relates to a method for reducing the leakage current of bismuth ferrite-barium titanate piezoelectric ceramic and improving the high-temperature resistivity of the bismuth ferrite-barium titanate piezoelectric ceramic, which comprises the following steps: (1) taking Fe2O3 powder, Bi2O3 powder, BaCO3 powder and TiO2 powder as raw materials, weighing and mixing according to the stoichiometric ratio (1-x) BiFeO3-xBaTiO3 of the bismuth ferrite-barium titanate piezoelectric ceramic, and synthesizing, granulating and forming to obtain a ceramic biscuit; (2) removing plastic from the obtained ceramic biscuit, firstly heating to T1, then cooling to T2, and keeping the temperature for 5-20 hours, thereby reducing the leakage current of the bismuth ferrite-barium titanate piezoelectric ceramic and improving the resistivity; wherein T1 ranges from 950 DEG C to 1100 DEG C, T2 ranges from 750 DEG C to 950 DEG C, and T1 is larger than T2.
本发明涉及一种降低铁酸铋‑钛酸钡压电陶瓷漏电流以及提高其高温电阻率的方法，包括：（1）以Fe2O3粉体、Bi2O3粉体、BaCO3粉体、TiO2粉体为原料，按照铁酸铋‑钛酸钡压电陶瓷的化学计量比(1‑x)BiFeO3‑xBaTiO3称取并混合，再经合成、造粒和成型，得到陶瓷素坯；（2）将所得陶瓷素坯经排塑后，先升温至T1再降温至T2并保温5～20小时，从而降低铁酸铋‑钛酸钡压电陶瓷漏电流以及提高电阻率；其中，T1=950～1100℃，T2=750～950℃，且T1＞T2。
Method for reducing leakage current of bismuth ferrite-barium titanate piezoelectric ceramic and improving high-temperature resistivity of bismuth ferrite-barium titanate piezoelectric ceramic
一种降低铁酸铋-钛酸钡压电陶瓷漏电流以及提高其高温电阻率的方法
DONG XIANLIN (author) / KANG WENSHUO (author) / LIANG RUIHONG (author)
2022-04-05
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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