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Bulgarian Journal of Physics
Print: 1310-0157 Online: 1314-2666
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RECOGNIZED BY THE EUROPEAN PHYSICAL SOCIETY 
Bulg. J. Phys. vol.28 no.5-6 (2001), pp. 246-249
Dielectric and Piezoelectric Properties of Modified PbTiO3 Ceramics
M. Nadoliisky
Department of Physics, University of Architecture, Civil Engineering and Geodesy, 1 Hristo Smirnenski Blvd, 1421 Sofia, Bulgaria
go backDepartment of Physics, University of Architecture, Civil Engineering and Geodesy, 1 Hristo Smirnenski Blvd, 1421 Sofia, Bulgaria
Abstract. This article deals with the results from the studies of the relative dielectric constant, the dielectric losses tan
, the planar coupling factor Kp, the thickness coupling factor Kt, as well as the temperature stability of er in the temperature range from -25°C to 70°C of (Pbi-xCax)TiO3 ceramics modified with Pb(Co0.5W0.5)O3, NiO and MnO2. Maximum anisotropy coefficient Kt/Kp = 5.55 and best temperature stability of er are registered for the composition with x = 23 at. % CaTiO3 with additives of NiO and Pb(Co0.5W0.5)O3.