Synthesis of V 2 O 3 Powder by Evaporative Decomposition of Solutions and H 2 Reduction
Authors:
- 1 December 1990
- journal article
- Published by Wiley in Journal of the American Ceramic Society
- Vol. 73 (12) , 3715-3717
Abstract
The evaporative decomposition of solutions method was used to form V 2 O 5 . Spraying above the congruent melting temperature of V 2 O 5 (690°C) resulted in dense spherical particles with a smooth surface. Spraying below the V 2 O 5 melting temperature yielded porous V 2 O 5 powder with a rough surface. Reduction of the V 2 O 5 to V 2 O 3 was done in a H 2 atmosphere. Spherical V 2 O 3 powder was attained when the reduction temperature was low enough to reduce the V 2 O 5 surface before partial sintering (necking) between V 2 O 5 particles occurred. The resulting V 2 O 3 particle size was smaller than the precursor V 2 O 5 powder as expected by the differences in densities between V 2 O 5 ( p = 3.36 g/cm 3 ) and V 2 O 3 ( p = 4.87 g/cm 3 ).Keywords
This publication has 4 references indexed in Scilit:
- Metal oxide-polymer thermistorsJournal of Materials Science, 1989
- TiO—epoxy composite thermistorsPhase Transitions, 1986
- Formation and Aging of Precipitates. VI. Morphology of Crystals in Various Vanadium Pentoxide Sols by Electron MicroscopyBulletin of the Chemical Society of Japan, 1958
- Herstellung kolloider Vanadinsäure nach einer neuen DispersionsmethodeZeitschrift für Chemie und Industrie der Kolloide, 1911