Remarkably high-temperature stable piezoelectric properties of Bi(Mg 0.5 Ti 0.5 )O 3 modified BiFeO 3 –BaTiO 3 ceramics
2012; American Institute of Physics; Volume: 101; Issue: 3 Linguagem: Inglês
10.1063/1.4736724
ISSN1520-8842
AutoresChangrong Zhou, Antonio Feteira, Xu Shan, Huabin Yang, Qing Zhou, Jun Cheng, Weizhou Li, Hua Wang,
Tópico(s)Dielectric properties of ceramics
ResumoDense (1-y)BiFe1−x(Mg0.5Ti0.5)xO3 − yBaTiO3 (BFMT-BT, y = 0.29, x = 0-0.12) ceramics with a pseudocubic perovskite crystal structure exhibit remarkably high-temperature stable piezoelectric properties. In particular, x = 0.03 BFMT-BT ceramics, with a Curie temperature, Tc, of ∼425 °C, show a stable piezoelectric coefficient, d33, of ∼155 pC/N up to a depolarization temperature, Td, of ∼400 °C. This Td is higher than Tc for Pb(Zr,Ti)O3, therefore suggesting BFMT-BT ceramics to be promising high-temperature Pb-free piezoelectric materials.
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