Effects of aging time on V2O5 sol-gel coatings

Gary A. Pozarnsky, Lisa Wright, Alon V. Mccormick

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

Vanadium pentoxide (V2O5) sols have been used in conductive coatings and related applications [1, 2, 3]; however, the changes which may occur in the properties of these coatings with sols of different ages have not been carefully shown. Properties which may be dependent on the age of the sol (sol viscosity, film morphology and conductance) were measured in this work. The coating sols were prepared by ion-exchange of sodium metavanadate solutions. It was found that the coating thickness, sol viscosity, and surface morphology of the coatings were directly related to the age of the sol used. The dried coating thickness increased from 3 microns to 20 microns over a 30 day period. The sol viscosity increased from 1 centipoise to near 2 centipoise. The surface morphology of the coatings changed from that of a featureless surface at day 1 to a continual coverage of micron-sized fibers as the coating sols aged. The conductivity of the coatings, though, was unaffected by the age of the sol. The coating properties were correlated to the amount of polymerization of dissolved precursors in solution.

Original languageEnglish (US)
Pages (from-to)57-62
Number of pages6
JournalJournal of Sol-Gel Science and Technology
Volume3
Issue number1
DOIs
StatePublished - Jan 1 1994

Keywords

  • VO sols
  • aging time
  • coatings

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