Untitled
Language
en
Article de revue
This item was published in
Journal of Applied Physics. 2007, vol. 102, n° 11, p. 114106
American Institute of Physics
English Abstract
The ferroelectric, piezoelectric, and pyroelectric properties of Ba1−xNaxTi1−xNbxO3 with x=0.70 (BTNN0.70) lead-free ceramic were investigated. Polycrystalline sample with composition BTNN0.70 was prepared by using ...Read more >
The ferroelectric, piezoelectric, and pyroelectric properties of Ba1−xNaxTi1−xNbxO3 with x=0.70 (BTNN0.70) lead-free ceramic were investigated. Polycrystalline sample with composition BTNN0.70 was prepared by using conventional dry ceramic technique. Sample was sintered at 1250 °C for 3 h under oxygen showed perovskite structure with high densities 4.92 g/cm3 (~96% as relative density). X-ray analysis confirmed the formation of single-phase compound with cubic crystal structure. Dielectric properties were studied in detail as a function of frequency and temperature. From temperature variation of dielectric constant, Curie temperature (TC) was determined. Discussion on hysteresis behavior for the sample at room temperature is presented. An essential relation between the piezoelectric properties and the ferroelectric nature of the ceramics was detected. The piezoelectric and pyroelectric coefficients of the ceramic were studied as a function of temperature.Read less <
English Keywords
Barium compounds
Crystal structure
Dielectric hysteresis
Ferroelectric ceramics
Ferroelectric Curie temperature
Ferroelectricity
Permittivity
Piezoceramics
Piezoelectricity
Pyroelectricity
Sintering
Sodium compounds
Titanium compounds
X-ray diffraction
Origin
Hal imported