Published May 1996
| Version v1
Journal article
Fabrication, microstructure and electrical conductivity of V2O5 ceramics
- 1. Doshisha Univ., Kyoto (Japan). Dept. of Molecular Science and Technology
- 2. Taiyo Koko Co. Ltd., Hyogo (Japan)
Description
V2O5 gels corresponding to the formula V2O5 · nH2O with n = 2.07, 0.5, and 0.2 have been prepared by the hydrolysis of VO(OC2H5)3, followed by washing and drying. After dehydration, V2O5 crystallizes at 310--400 C. V2O5 powders with strip-like particles are produced after heating at 630 C. Well-densified V2O5 ceramics (97.7% of theoretical) have been fabricated by the combined use of hot pressing (630C/2h/30MPa) and hot isostatic pressing (630 C/1h/196MPa). The texture is of a plate structure, the grain being ∼30 microm long and ∼6 microm wide. Electrical conductivities have been measured in the temperature range of 25--600 C. Activation energies are determined to be 0.09 and 0.18 eV for initial and final stages, respectively
Additional details
Publishing Information
- Journal Title
- Materials Research Bulletin
- Journal Volume
- 31
- Journal Issue
- 5
- Journal Page Range
- p. 531-537.
- ISSN
- 0025-5408
- CODEN
- MRBUAC
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 27055631
- Subject category
- S36: MATERIALS SCIENCE;
- Descriptors DEI
- BULK DENSITY; DIFFERENTIAL THERMAL ANALYSIS; ELECTRIC CONDUCTIVITY; HARDNESS; HOT PRESSING; HYDROLYSIS; MICROSTRUCTURE; SAMPLE PREPARATION; SCANNING ELECTRON MICROSCOPY; SOL-GEL PROCESS; THERMAL GRAVIMETRIC ANALYSIS; TRANSMISSION ELECTRON MICROSCOPY; VANADIUM OXIDES; X-RAY DIFFRACTION
- Descriptors DEC
- CHALCOGENIDES; CHEMICAL ANALYSIS; CHEMICAL REACTIONS; COHERENT SCATTERING; CRYSTAL STRUCTURE; DECOMPOSITION; DENSITY; DIFFRACTION; ELECTRICAL PROPERTIES; ELECTRON MICROSCOPY; FABRICATION; GRAVIMETRIC ANALYSIS; MATERIALS WORKING; MECHANICAL PROPERTIES; MICROSCOPY; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; PRESSING; QUANTITATIVE CHEMICAL ANALYSIS; SCATTERING; SOLVOLYSIS; THERMAL ANALYSIS; TRANSITION ELEMENT COMPOUNDS; VANADIUM COMPOUNDS