Back to Search
Start Over
Fabrication of Textured Bismuth Sodium Titanate Using Excess Bismuth Oxide
- Source :
- Japanese Journal of Applied Physics. 44:8055
- Publication Year :
- 2005
- Publisher :
- IOP Publishing, 2005.
-
Abstract
- Bi0.5Na0.5TiO3 (BNT) bulk ceramics with a preferred orientation (texture) were prepared by the reactive-templated grain growth method using platelike Bi4Ti3O12 (BiT) particles as templates for BNT. The texture did not develop extensively in stoichiometric BNT, but the addition of excess Bi2O3 to BNT enhanced the texture development. The role of excess Bi2O3 was examined. The calcined compacts were composed of matrix grains with random orientation and -oriented grains transformed from aligned BiT particles, and texture developed by the preferential growth of oriented grains at the expense of matrix grains. In stoichiometric BNT, the growth rate of matrix grains was high and the conditions for the preferential growth of the oriented grains were disrupted. Excess Bi2O3 reduced grain growth rate, and the conditions for preferential growth were maintained, resulting in the development of highly textured BNT. The resultant textured BNT ceramic exhibited 70% higher piezoelectric d 31 and electromechanical k p coefficients than nontextured BNT.
- Subjects :
- Fabrication
Materials science
Metallurgy
General Engineering
Oxide
General Physics and Astronomy
chemistry.chemical_element
law.invention
Bismuth
Grain growth
chemistry.chemical_compound
chemistry
law
visual_art
visual_art.visual_art_medium
Calcination
Ceramic
Growth rate
Texture (crystalline)
Composite material
Subjects
Details
- ISSN :
- 13474065 and 00214922
- Volume :
- 44
- Database :
- OpenAIRE
- Journal :
- Japanese Journal of Applied Physics
- Accession number :
- edsair.doi...........3a01cd9e069f24e1a672be620e799219