Title :
Dielectric and pyroelectric properties in the La-doped 0.45Pb(Mg 1/3Ta2/3)O3-0.55PbZrO3 system
Author :
Kim, Yeon Jung ; Choi, Seong Won
Author_Institution :
Dept. of Phys., Dankook Univ., Chungnam, South Korea
Abstract :
Dielectric and pyroelectric properties of relaxor ferroelectric in the 0.45(Pb1-3x/2Lax)(Mg1/3Ta2/3 )O3-0.55PbZrO3 solid solution series have been investigated. The dielectric constant and loss of ceramic samples were determined. The pyroelectric coefficient and spontaneous polarization were measured by the static Byer-Roundy method as a function of temperature and for various compositions in the La-doped PMT-PZ system. The addition of La2O3 was less effective in grain growth and shifting of the Tc~12°C/mole% downward in PMT-PZ system. Dielectric and pyroelectric properties of this system were improved by adding a small amount of La2O3. Compositions near 0.45PMT-0.55 PZ-0.04La have been identified to have high pyroelectric figures of merit near room temperature
Keywords :
ceramics; dielectric losses; dielectric polarisation; ferroelectric materials; grain growth; lead compounds; permittivity; pyroelectricity; La-doped Pb(Mg1/3Ta2/3)O3-PbZrO 3; PMT-PZ; PbMgTaO3-PbZrO3:La; ceramic; dielectric constant; dielectric loss; grain growth; pyroelectric figure of merit; relaxor ferroelectric; solid solution; spontaneous polarization; static Byer-Roundy method; Ceramics; Dielectric constant; Dielectric losses; Dielectric materials; Dielectric measurements; Frequency; Pyroelectricity; Relaxor ferroelectrics; Solids; Temperature dependence;
Conference_Titel :
Applications of Ferroelectrics, 1996. ISAF '96., Proceedings of the Tenth IEEE International Symposium on
Conference_Location :
East Brunswick, NJ
Print_ISBN :
0-7803-3355-1
DOI :
10.1109/ISAF.1996.598067
