Densification and crystallization of zirconia thin films prepared by sol-gel processing [electronic resource].
- Published
- Washington, D.C. : United States. Dept. of Energy, 1993.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy. - Physical Description
- 28 pages : digital, PDF file
- Additional Creators
- Sandia National Laboratories, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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- Restrictions on Access
- Free-to-read Unrestricted online access
- Summary
- We have investigated the effects of precursor nature and heat treatment schedule on the densification and crystallization behavior of sol-gel derived zirconia thin films. Precursor solutions were prepared from n-propanol, zirconium (IV) n-propoxide, and either acetic acid, or 2,4-pentanedione (acac) and water additions. By controlling the ligand type and ligand-to-metal ratio, we were able to prepare films which displayed significant differences in densification behavior. We attribute the dissimilarity in densification to variations in the nature of the as-deposited films, as influenced by ligand type and concentration. While the acac- derived film was a physical gel, (i.e., a physical aggregation of the oligomeric species), the acetic acid-derived film, which exhibited less consolidation, was a chemical gel that could not be redissolved in the parent solvent. Films prepared with large acac/metal ratios and small water additions exhibited minimal crosslinking at 25°C, displayed the greatest consolidation (∼86% shrinkage) and the highest refractive index (n = 2.071) when heat treated. These results indicate the importance that M-O-M bonds (crosslinks) formed at low temperature can have on densification behavior. We also report on the effects of heat-treatment schedules and ramp rates on densification behavior. All of the films of the present study crystallized into the cubic phase, at temperatures ranging from ∼400°C to greater than 700°C, depending on the heating rate.
- Report Numbers
- E 1.99:sand--93-0975c
E 1.99: conf-931142--5
conf-931142--5
sand--93-0975c - Subject(s)
- Other Subject(s)
- Note
- Published through SciTech Connect.
12/31/1993.
"sand--93-0975c"
" conf-931142--5"
"DE94005573"
"GB0103012"
1. meeting of the Pacific Rim ceramic societies,Honolulu, HI (United States),7-10 Nov 1993.
Schwartz, R.W.; Voigt, J.A.; Boyle, T.J.; Buchheit, C.D. - Funding Information
- AC04-94AL85000
View MARC record | catkey: 14452754