Structure and ferroelectric properties of Bi(Zn 1/2 Ti 1/2 )O 3 -(Bi 1/2 K 1/2 )TiO 3 perovskite solid solutions
2009; Institute of Electrical and Electronics Engineers; Volume: 56; Issue: 7 Linguagem: Inglês
10.1109/tuffc.2009.1186
ISSN2373-7840
AutoresChien‐Chih Huang, Naratip Vittayakorn, David P. Cann,
Tópico(s)Multiferroics and related materials
ResumoLead-free piezoelectric ceramics based on chiBi(Zn 1/2 Ti 1/2 )O 3 -(1-chi)(Bi 1/2 K 1/2 )TiO 3 were obtained via solid state processing techniques. A single perovskite phase with tetragonal symmetry was obtained for Bi(Zn 1/2 Ti 1/2 )O 3 (BZT) substitutions up to 20 mol%. The maximum density was 97.1% at the composition of chi = 0.1. The dielectric measurement indicated that the transition temperature decreased linearly with increasing BZT content. The P-E loops revealed an increase in remanent polarization (P r ) with the addition of BZT. The maximum planar coupling coefficient, kappa r , for the chi = 0.1 composition was 21.6 and the piezoelectric coefficient, d 33 , for chi = 0, chi = 0.05, and chi = 0.1 was 108, 185, and 235 pm/V, respectively. Overall, the dielectric and piezoelectric properties showed significant improvement when BZT was added.
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