MnO_2掺杂对BiFeO_3-PbTiO_3-Bi(Zn_(1/2)Ti_(1/2))O_3-PbZrO_3陶瓷组织与性能的影响

Effect of MnO_2 Doping on the Structure and Properties of BiFeO_3-PbTiO_3-Bi(Zn_(1/2)Ti_(1/2))O_3-PbZrO_3 Ceramics

采用固相烧结法制备MnO2掺杂的BiFeO3-PbTiO3-Bi（Zn1/2Ti1/2）O3-PbZrO3（BF-PT-BZT-PZ）压电陶瓷,研究了不同MnO2掺杂量对材料结构及压电介电性能的影响。实验结果表明,适量的MnO2掺杂,不仅能使晶粒长大,提高晶界强度,而且可以改善材料的介电压电性能。当MnO2掺杂量为0.1mol%时,880℃（5h）烧结的陶瓷样品性能参数为：d33=97pC/N,kp=0.29,kt=0.37,εr=390,tanδ~0.02。

Mn O2 doped Bi Fe O3-Pb Ti O3-Bi（ Zn1 /2Ti1 /2） O3-Pb Zr O3（ BF-PT-BZT-PZ） ceramics were prepared by high temperature solid state method. The effects of variant Mn O2 contents on microstructure,piezoelectric and dielectric properties were studied. The results show that grain sizes and grain boundary strength could be increased by appropriate Mn O2 dopants. The piezoelectric and dielectric properties of BF-PT-BZT-PZ ceramics are improved with Mn O2 contents. When the amount of Mn O2 is 0. 1mol% and sintered at 880 ℃ for 5 h,the ceramics show optimized properties of d33= 97 p C / N,kp= 0. 29,kt= 0.37,εr= 390,tanδ ~ 0. 02.