Title :
Grain size effect on the dielectric properties of strontium barium titanate
Author :
Kumar, U. ; Wang, S.F. ; Varanasi, S. ; Dougherty, J.P.
Author_Institution :
Mater. Res. Lab., Pennsylvania State Univ., University Park, PA, USA
fDate :
30 Aug-2 Sep 1992
Abstract :
The effect of grain size on the dielectric properties of Sr0.2Ba0.8TiO3 (SBT) ceramic is reported. SBT powder prepared by a hydrothermal procedure was used in this study. A porous ceramic was prepared by sintering the powder compacts between 1100°C and 1350°C for 5 min-10 h, either by conventional sintering or by fast firing. When the average grain size of the ceramic was between 0.75 and 1.2 μm, the room temperature dielectric constant peaked to 5500-6000. In porous fine grain ceramic, classic P vs. E hysteresis behavior is observed. The etched and polished microstructure of fine grain porous ceramic showed multidomain characteristics
Keywords :
barium compounds; ceramics; dielectric hysteresis; electric domains; etching; ferroelectric materials; grain size; permittivity; porous materials; powder technology; sintering; strontium compounds; 1100 to 1350 degC; Sr0.2Ba0.8TiO3 ceramic; average grain size; dielectric properties; etched microstructure; fast firing; grain size effect; hydrothermal procedure; hysteresis behavior; multidomain characteristics; polished microstructure; porous fine grain ceramic; powder compacts; room temperature dielectric constant; sintering; Barium; Ceramics; Dielectric constant; Etching; Firing; Grain size; Hysteresis; Powders; Strontium; Temperature;
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.1992.300621
