PmP118. Piezoelectric ceramics for high-temperature transducers

Electromechanical properties of calcium bismuth titanate films: A potential candidate for lead-free thin-film piezoelectrics

“…2,3 CBTi144 is characterized by its high Curie point of about 790°C and is therefore expected to be useful for special applications at relatively high temperatures. 4 Compounds in this family have anisotropic ferroelectricity, which is strongly associated with the crystal structure, especially the compounds with n equal to an even number which have no polarization along the c axis because there is a mirror plane perpendicular to the axis. 5 The polarization of the compounds is along the a axis.…”

Structure Study of Bi2.5Na0.5Ta2O9 and Bi2.5Nam−1.5NbmO3m+3 (m=2–4) by Neutron Powder Diffraction and Electron Microscopy

“…The extensively investigated ferroelectric properties, with high transition temperatures and large spontaneous polarization (2), make it possible to use these materials as e.g., an information-storage medium in non-volatile computer memories (3). Some phases hold the ability of ion conductivity with a given flux at a comparable lower temperature than for other materials (4) and some phases have catalytic properties suitable for selective oxidation and ammoxidation (5).…”

Conductividad eléctrica en corriente alterna de materiales cerámicos aurivillius de composición Pb_xBi₄Ti_3+xO_12+3x, x=0,1,2 y 3

“…Estos materiales poseen estructura laminar, que consiste en capas octaédricas tipo perovskita, entre las que se intercalan láminas de (Bi 2 O 2 ) 2+ (1). Debido a sus propiedades, varios compuestos FLB son candidatos a utilizarse como piezoeléctricos de alta temperatura de operación, en dispositivos electroópticos, como sensores de presión y en memorias no volátiles ferroeléctricas (2)(3)(4)(5). Sin embargo, se deben superar ciertos problemas antes de extender la aplicación tecnológica de materiales cerámicos FLB, aunque su utilización en lámina delgada parece estar más madura.…”