Ogawa Hirozumi, Kawada Shinichiro, Kimura Masahiko, Shiratsuyu Kousuke, Sakabe Yukio
Murata Manufactutring Company Ltd., Nagaokakyo-shi, Kyoto, Japan.
IEEE Trans Ultrason Ferroelectr Freq Control. 2007 Dec;54(12):2500-4. doi: 10.1109/TUFFC.2007.567.
Abstract-The high-power piezoelectric characteristics in h001i oriented ceramics of bismuth layer structured ferroelectrics (BLSF), SrBi(2)Nb(2)O(9) (SBN), (Bi,La)(4)Ti(3)O(12) (BLT), and CaBi(4)Ti(4)O(15) (CBT), were studied by a constant voltage driving method. These textured ceramics were fabricated by a templated grain growth (TGG) method, and their Lotgering factors were 95%, 97%, and 99%, respectively. The vibration velocities of the longitudinal mode (33-mode) increased proportionally to an applied electric field up to 2.5 m/s in these textured BLSF ceramics, although, the vibration velocity of the 33-mode was saturated at more than 1.0 m/s in the Pb(Mn,Nb)O(3)-PZT ceramics. The resonant frequencies were constant up to the vibration velocity of 2.5 m/s in the SBN and CBT textured ceramics; however, the resonant frequency decreased with increasing over the vibration velocity of 1.5 m/s in the BLT textured ceramics. The dissipation power density of the BLT was almost the same as that of the Pb(Mn,Nb)O(3)-PZT ceramics. However, the dissipation power densities of the SBN and CBT were lower than those of the BLT and Pb(Mn,Nb)O(3)-PZT ceramics. The textured SBN and CBT ceramics are good candidates for high-power piezoelectric applications.
摘要——采用恒压驱动法研究了铋层状结构铁电体（BLSF）中h001i取向陶瓷、SrBi₂Nb₂O₉（SBN）、（Bi,La）₄Ti₃O₁₂（BLT）和CaBi₄Ti₄O₁₅（CBT）的高功率压电特性。这些织构陶瓷采用模板晶粒生长（TGG）法制备，其Lotgering因子分别为95%、97%和99%。在这些织构BLSF陶瓷中，纵向模式（33模式）的振动速度与施加电场成正比增加，直至2.5 m/s，不过，在Pb（Mn,Nb）O₃-PZT陶瓷中，33模式的振动速度在超过1.0 m/s时达到饱和。在SBN和CBT织构陶瓷中，共振频率在振动速度达到2.5 m/s之前保持恒定；然而，在BLT织构陶瓷中，共振频率在振动速度超过1.5 m/s时随其增加而降低。BLT的耗散功率密度与Pb（Mn,Nb）O₃-PZT陶瓷的几乎相同。然而，SBN和CBT的耗散功率密度低于BLT和Pb（Mn,Nb）O₃-PZT陶瓷。织构SBN和CBT陶瓷是高功率压电应用的良好候选材料。
