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- Title
Microstructural, electrical, and mechanical characterization of BiCuVO (BICUVOX) ceramics fabricated from co-precipitated precursor powders.
- Authors
Sabolsky, Edward; Razmyar, Soheil; Sabolsky, Katarzyna
- Abstract
Copper-doped bismuth vanadate (Bi2Cu0.1V0.9O5.35, BICUVOX) was synthesized by a co-precipitation process which resulted in a homogenous, fine-grained powder with an average particle size of ~0.45 μm. The consolidated BICUVOX powder was sintered at temperatures between 625 and 800 °C for 0-8 h in air. The correlation between the thermal processing schedule and the final microstructure were completed for all conditions through stereological analysis of the resultant cross-sectional scanning electron microscope images. From this work, the sintering schedule of 675 °C for 1 h resulted in acquiring a BICUVOX ceramic microstructure that displayed ~97 % relative density with an average grain size of ~1.29 μm. This processing condition was ~75-125 °C lower than typical sintering temperatures for the same density, and resulted in a final grain size that is ~5-10 μm smaller in size. The four-point conductivity testing of the BICUVOX ceramics in air showed values of ~0.003-0.007 and ~0.07-0.12 S/m at 300 °C and 500 °C, respectively, depending upon the thermal processing schedule. The average flexure strength of the same BICUVOX membrane was measured using a ring-on-ring configuration, and this measurement showed flexural strengths as high as 159.3 MPa. This strength is ~92 % greater than previously reported values for BICUVOX membranes.
- Subjects
MATERIALS science; BISMUTH compounds; VANADATES; CERAMOGRAPHY; ELECTRIC properties; MECHANICAL behavior of materials; PRECIPITATION (Chemistry)
- Publication
Journal of Materials Science, 2013, Vol 48, Issue 2, p733
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-012-6787-2