Title :
Textured sodium bismuth titanate (Na1/2Bi1/2) 0.945Ba0.055TiO3 ceramics by templated grain growth
Author :
Yilmaz, H. ; Messing, G.L. ; Trolier-McKinstry, S.
Author_Institution :
Dept. of Mater. Sci. & Eng., Pennsylvania State Univ., University Park, PA, USA
Abstract :
A process to produce [001] textured sodium bismuth titanate (NBT)-barium titanate (Na1/2Bi1/2TiO3-5.5 mol% BaTiO3 ) ceramics by templated grain growth (TGG) was developed. Molten salt synthesized (001) SrTiO3 platelets were oriented in an NBT matrix powder by tape casting. During heating, Na1/2Bi 1/2TiO3-5.5 mol% BaTiO3 nucleated and grew on the surface of the SrTiO3 templates. A brick-like microstructure with 90% texture was obtained with a template particle at the center of each oriented grain. Preliminary electrical properties of textured Na1/2Bi1/2TiO3-5.5 mol% BaTiO 3 ceramics are compared with the properties of randomly oriented ceramics with the same chemical composition
Keywords :
X-ray diffraction; barium compounds; bismuth compounds; dielectric polarisation; grain growth; permittivity; piezoceramics; powder technology; sintering; sodium compounds; texture; (NaBi)0.945Ba0.055TiO3; SEM; XRD; ball milled; brick-like microstructure; dielectric constant; high Curie temperature; loss tangent; molten salt synthesized platelets; piezoelectric coefficient; poled samples; remanent polarizations; saturated polarization curves; tape casting; templated grain growth; textured ceramics; Bismuth; Ceramics; Dielectric measurements; Heating; Piezoelectric materials; Powders; Slurries; Tape casting; Temperature; Titanium compounds;
Conference_Titel :
Applications of Ferroelectrics, 2000. ISAF 2000. Proceedings of the 2000 12th IEEE International Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
0-7803-5940-2
DOI :
10.1109/ISAF.2000.941582
