Processing and characterization of porous TiO[sub 2] coatings
- Univ. of Minnesota, Minneapolis, MN (United States). Dept. of Chemical Engineering and Materials Science
Titania coatings were prepared by spin coating anhydrous titanium ethoxide solutions onto Si substrates. During deposition, Ti ethoxide in the solution layer reacted with atmospheric moisture to form precipitated particles. The resulting microstructures were composed of a network of particles and particle clusters. The induction time for precipitation, the particle diameter, and the size and packing of particle clusters were influenced by the Ti concentration in the sol and the spinning rate used for deposition. Individual particle sizes ranged from [approximately]150 to 250 nm. Smaller particles and more compact particle clusters were characteristic of coatings prepared from solutions with lower Ti concentrations and those prepared using faster spinning rates. As-deposited coatings were amorphous and crystallized into the anatase phase at [approximately]400C. Transformation to the rutile phase began at [approximately]850C, and the transformation rate was influenced by the microstructure.
- OSTI ID:
- 6301925
- Journal Information:
- Journal of the American Ceramic Society; (United States), Vol. 76:3; ISSN 0002-7820
- Country of Publication:
- United States
- Language:
- English
Similar Records
Preparation, characterization, and photocatalytic studies on anatase nano-TiO{sub 2} at internal air lift circulating photocatalytic reactor
Influence of acid precursors on physicochemical properties of nanosized titania synthesized by thermal-hydrolysis method
Related Subjects
TITANIUM OXIDES
MICROSTRUCTURE
SPIN-ON COATING
AMORPHOUS STATE
CRYSTAL-PHASE TRANSFORMATIONS
HUMIDITY
ORGANOMETALLIC COMPOUNDS
PARTICLE SIZE
POROSITY
POWDERS
PRECURSOR
SILICON
SPIN-ON COATINGS
SUBSTRATES
CHALCOGENIDES
COATINGS
DEPOSITION
ELEMENTS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
SEMIMETALS
SIZE
SURFACE COATING
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies