Title :
The influence of La content in PLZT-x/95/5 ceramics (x =0.5 to 4%) on the dielectric, pyroelectric, thermally stimulated current and Raman scattering measurements and model interpretation
Author :
Handerek, J. ; Ujma ; Dmytrow, D. ; Carabatos-Nedelec, C. ; El-Harrad, I.
Author_Institution :
Inst. of Phys., Silesian Univ., Poland
fDate :
30 Aug-2 Sep 1992
Abstract :
PLZT (lead lanthanum zirconate titanate) x/95/5 ceramics with low La concentration, x=0.5 to 4 wt.%, exhibit an antiferroelectric (AFE)-ferroelectric (FE)-paraelectric (PE) phase sequence. The FE phase exists in both AFE and PE phases in a wide range. Dielectric, pyroelectric, thermally stimulated current, and Raman scattering measurements have been performed as functions of temperature in all phases. The diffuse character of the phase transitions was confirmed, and the width of the phases coexistence was proved to depend on the La concentration. A model is proposed for interpreting the defects and the phase balance
Keywords :
Raman spectra of inorganic solids; antiferroelectric materials; ceramics; crystal defects; dielectric hysteresis; ferroelectric transitions; lanthanum compounds; lead compounds; permittivity; pyroelectricity; thermally stimulated currents; AFE phase; FE phase; La content; PE phases; PLZT; PbLaZrO3TiO3; Raman scattering; antiferroelectric-ferroelectric transition; ceramics; defects; dielectric constant; dielectric hysteresis; ferroelectric-paraelectric transition; pyroelectric current; thermally stimulated current; Ceramics; Current measurement; Dielectric measurements; Iron; Lanthanum; Performance evaluation; Phase measurement; Pyroelectricity; Raman scattering; Titanium compounds;
Conference_Titel :
Applications of Ferroelectrics, 1992. ISAF '92., Proceedings of the Eighth IEEE International Symposium on
Conference_Location :
Greenville, SC
Print_ISBN :
0-7803-0465-9
DOI :
10.1109/ISAF.1992.300712
