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Exaggerated grain growth in Ni-doped BaTiO3 ceramics
- Source :
-
Materials Chemistry & Physics . Oct2007, Vol. 105 Issue 2/3, p320-324. 5p. - Publication Year :
- 2007
-
Abstract
- Abstract: With approximately 0.7mol% Ni doping, the formation of hexagonal phase in BaTiO3 after sintering at a temperature above 1385°C in air has been observed. The shape of the h-BaTiO3 grains is plate-like, and the length of these h-BaTiO3 plates can be longer than 15mm. As the amount of Ni doping increases above or decreases below 0.7mol%, the hexagonal phase disappears and the resulting microstructure is dominated by small BaTiO3 grains. This critical amount of Ni (i.e. 0.7mol%) corresponds to the solubility of Ni in BaTiO3. The exaggerated growth of the plate-like grains in BaTiO3 relates strongly to the formation of oxygen vacancies due to the presence of Ni acceptors. [Copyright &y& Elsevier]
- Subjects :
- *MATERIALS science
*PHYSICAL sciences
*CHEMISTRY
*SCIENCE
Subjects
Details
- Language :
- English
- ISSN :
- 02540584
- Volume :
- 105
- Issue :
- 2/3
- Database :
- Academic Search Index
- Journal :
- Materials Chemistry & Physics
- Publication Type :
- Academic Journal
- Accession number :
- 26486139
- Full Text :
- https://doi.org/10.1016/j.matchemphys.2007.04.075