Effects of Aging Time on V2O5 Sol-Gel Coatings
Abstract
Vanadium pentoxide (V2O5) sols have been used in conductive coatings and related applications. From cryo-Transmission Electron Microscopy (TEM) and Nuclear Magnetic Resonance (NMR) spectroscopic studies of the gelation, there are several intermediate structures and reactions in this process, but no information is yet available on the effects of aging on the dependent properties of viscosity, conductance, and film morphology in the coating process. This study observed the changes in these properties over a 30 day period by means of rheological measurements and microscopic observation of the dried coatings obtained. The study found that the sol viscosity and ability to wet substrates is related to the initial decomposition of the precursors in solution and the start of the polymerization process. Distinct differences were observed in coating morphology as later aggregation and agglomeration processes occurred.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 12, 1993
- Accession Number
- ADA266824
Entities
People
- A. V. Mccormick
- G. A. Pozarnsky
- L. Wright
Organizations
- University of Minnesota