Title :
Piezoelectric properties of BiFeO3-PbTiO3 ceramics
Author :
Comyn, T.P. ; Stevenson, T. ; Bell, A.J.
Author_Institution :
Inst. of Mater. Res., Leeds Univ., UK
Abstract :
Polycrystalline (1-x)BiFeO3-(x)PbTiO3 ceramics (where x=0.2, 0.3 and 0.5) doped with low concentrations of Sb have been produced via a mixed oxide route. Ceramic disks were thinned and electroded and the high electric field resistivity measured at 100 and 150°C in order to mimic poling conditions. It was found that the high field resistivity was sensitive to composition in undoped materials, and that low dopant concentrations of Sb provided a marked increase in resistivity. This improvement in resistivity increased the maximum permissible poling field by 30% at 150°C for (BiFeO3)0.7-(PbTiO3)0.3 with 0.2 at% doping compared to the undoped materials.
Keywords :
antimony; bismuth compounds; chemical analysis; dielectric polarisation; discs (structures); doping; electrical resistivity; ferroelectric ceramics; lead compounds; piezoceramics; 100 degC; 150 degC; BiFeO3-PbTiO3; BiFeO3-PbTiO3 ceramics; ceramic disks; dopant concentrations; electric field resistivity; maximum permissible poling field; mixed oxide route; piezoelectric properties; poling conditions; polycrystalline ceramics; Ceramics; Conducting materials; Conductivity; Dielectric breakdown; Dielectric materials; Doping; Ferroelectric materials; Iron; Piezoelectric materials; Temperature;
Conference_Titel :
Applications of Ferroelectrics, 2004. ISAF-04. 2004 14th IEEE International Symposium on
Print_ISBN :
0-7803-8410-5
DOI :
10.1109/ISAF.2004.1418352
