Influence of Sintering Conditions on Electric Performance of Textured 92BNT-6BT-2KNN Ceramics
0.92(Bi0.5Na0.5)TiO3-0.06BaTiO3-0.02(K0.5Na0.5)NbO3 (92BNT-6BT-2KNN) is a highstain material due to the volume change come from Antiferroelectric-Ferroelectric phase transformation.Textured 92BNT-6BT-2KNN with a Lotgering factor of 67% was obtained by templated grain growth method using plate-like (Bi0.5Na0.5)TiO3 (BNT) particles as templates.The influence of sintering process on Lotgering factor and strain was investigated.It was found that the Lotgering factor increased as sintering temperature increase and then decreased with further temperature increase.The changing tendency of polar and unipolar strain did not keep the same accordance with that of Lotgering factor.The maximum of Lotgering factor (79%) and polar strain (0.36%) was obtained when the sintering temperature was 1240℃ and 1220℃,respectively,due to the decrease of density when high sintering temperature was employed.Also it was found that the lotgering factor and polar strain reached its highest values when the soaking time was 4h.All these proved that the density and grain orientation codetermined the strain of 92BNT-6BT-2KNN ceramics.
Lead-free ceramics Electrostrictive strain Textured ceramics
Chenggen Ye Fang Fu Bo Shen Jiwei Zhai
Functional Materials Research Laboratory,Tongji University,Siping Road,Shanghai 200092,China
国际会议
The Seventh China International Conference on High-Performance Ceramics (第七届先进陶瓷国际研讨会(CICC-7))
厦门
英文
1380-1384
2011-11-04（万方平台首次上网日期，不代表论文的发表时间）