(Bi0.5Na0.5)0.94Ba0.06TiO3 lead-free ceramics with simultaneous addition of CeO2 and La2O3

被引:65
作者
Wang, XX [1 ]
Chan, HLW
Choy, CL
机构
[1] Hong Kong Polytech Univ, Dept Appl Phys, Hunghom Kowloon, Hong Kong, Peoples R China
[2] Hong Kong Polytech Univ, Ctr Mat Res, Hunghom Kowloon, Hong Kong, Peoples R China
来源
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING | 2005年 / 80卷 / 02期
关键词
Microstructure; Diffraction Pattern; Dielectric Constant; Electronic Material; CeO2;
D O I
10.1007/s00339-003-2210-9
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
(Bi0.5Na0.5)(0.94)Ba0.06TiO3 (BNBT-6) with simultaneous addition of 0.5 mol% CeO2 and 0.25, 0.5 and 0.75 mol% La2O3, respectively, was prepared by a conventional ceramic fabrication technique. An addition of 0.5 mol% CeO2 together with 0.5 mol% La2O3 enhanced the piezoelectric and dielectric constant of BNBT-6 ceramics significantly. At room temperature, this composition exhibits a high piezoelectric constant (d(33) = 162 x 10(-12) C/N) and relatively low dielectric loss (tan delta = 2.0%) at 1 kHz. X-ray diffraction pattern shows that the coexistence of tetragonal and rhombohedral phases in the BNBT-6 composition was not changed by adding CeO2+La2O3, and they diffused into the BNBT lattice during sintering. SEM observation indicates that a small amount of CeO2+La2O3 almost does not affect the microstructure.
引用
收藏
页码:333 / 336
页数:4
相关论文
共 12 条
[1]   Electrical properties of Na1/2Bi1/2TiO3-BaTiO3 ceramics [J].
Chu, BJ ;
Chen, DR ;
Li, GR ;
Yin, QR .
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2002, 22 (13) :2115-2121
[2]   PYROELECTRIC PROPERTIES OF (NA1/2BI1/2)TIO3 CERAMICS [J].
HAGIYEV, MS ;
ISMAILZADE, IH ;
ABIYEV, AK .
FERROELECTRICS, 1984, 56 (3-4) :215-217
[3]   Processing and electromechanical properties of (Bi0.5Na0.5)((1-1.5x))LaxTiO3 ceramics [J].
Herabut, A ;
Safari, A .
JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1997, 80 (11) :2954-2958
[4]  
Nakada H., 1999, P EL DIV M CER SOC J, V37
[5]   Relaxor behaviour of low lead and lead free ferroelectric ceramics of the Na0.5Bi0.5TiO3-PbTiO3 and Na0.5Bi0.5TiO3-K0.5Bi0.5TiO3 systems [J].
Saïd, S ;
Mercurio, JP .
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 2001, 21 (10-11) :1333-1336
[6]  
SMOLENSKY GA, 1961, FIZ TVERD TELA, V2, P2651
[7]   ELECTROSTRICTIVE STRAIN AND PYROEFFECT IN THE REGION OF PHASE COEXISTENCE IN NA0.5BI0.5TIO3 [J].
SUCHANICZ, J ;
ROLEDER, K ;
KANIA, A ;
HANDEREK, J .
FERROELECTRICS, 1988, 77 :107-110
[8]  
TAKANAKA T, 2001, ULTRASON TECHNOL, V8, P2
[9]  
Takenaka T., 1997, Ferroelectrics, V196, P175, DOI 10.1080/00150199708224156
[10]   (BI1/2NA1/2)TIO3-BATIO3 SYSTEM FOR LEAD-FREE PIEZOELECTRIC CERAMICS [J].
TAKENAKA, T ;
MARUYAMA, K ;
SAKATA, K .
JAPANESE JOURNAL OF APPLIED PHYSICS PART 1-REGULAR PAPERS SHORT NOTES & REVIEW PAPERS, 1991, 30 (9B) :2236-2239