Baoshan LI
,
Zhigang ZHU
,
Guorong LI
,
Aili DING
材料科学技术（英）
The microstructure and piezoelectric properties of Pb[(Zr0.52Ti0.48)0.95(Mn1/3Nb2/3)0.05]O3 (PMnN-PZT) ceramics have been investigated at different sintering temperatures from 1070℃ to 1280℃. The experimental results suggest that grain sizes and electromechanical properties of the ceramics show strong sintering temperature dependences. Double polarization to electric field (P-E) loops of the PMnN-PZT ceramics are assumed to be the result of the pinning effect of the defect dipoles. The results obtained through X-ray photoelectron spectrum suggest that sintering temperature affects valence of the Mn ion and quantity of oxygen vacancies. Hence, a proper explanation is proposed to illustrate the fluctuation of mechanical quality factor (Qm) due to the sintering temperature.
关键词:
Sintering temperature
,
压电特性
,
铌锰锆钛酸铅
,
氧空位
赵明磊
,
王矜奉
,
王春雷
,
王渊旭
,
张家良
,
陈洪存
功能材料与器件学报
doi:10.3969/j.issn.1007-4252.2005.01.010
用溶胶-凝胶工艺制备了 (Bi0.5Na0.5)0.94Ba0.06TiO3 + x wt% Mn (x=0- 0.4)系列无铅压电陶 瓷.研究发现适量锰的掺杂可以有效地降低材料的介电常数和介电损耗,同时提高材料的退极化 温度,但过量锰的掺杂使得材料的压电特性变差.当锰的掺杂量为 0.1wt%时,陶瓷具有该系列最 大的压电常数( d33=175× 10- 12C/N)、最大的机电耦合系数 kt=56%, kp=26%)、较小的介电损耗 tgδ =2.7%,较高的退极化温度( Td=82℃).
关键词:
溶胶-凝胶
,
无铅压电陶瓷
,
压电特性
