Crystal formation and growth of crystallites and particles of titanium anatase nuclei
This work investigates the crystal formation and the growth of anatase particles as a function of formation conditions. It was shown that a pure anatase phase of specified particle size can be produced with titanium chloride solutions and anatase nuclei during specified conditions of thermal hydrolysis. The growth of the titanium dioxide crystallites and particles was studied by x-ray phase analysis and by scanning electron microscopy. The titanium dioxide samples obtained from thermal hydrolysis (HTD) were calcined at 500/degree/C. It was observed that the acidity factor has practically no effect on anatase crystallite growth during hydrolysis. The dependence of anatase crystallite sizes on hydrolysis time is shown. Comparison of the data with crystallite sizes in precipitates calcined at 500/degrees/C showed that the state of aggregation of the titanium dioxide particles depends on the initial anatase crystallite size. This, in turn, is determined by the hydrolysis duration and by the amount of anatase nuclei introduced.
- OSTI ID:
- 6012052
- Journal Information:
- Inorg. Mater. (Engl. Transl.); (United States), Journal Name: Inorg. Mater. (Engl. Transl.); (United States) Vol. 24:7; ISSN INOMA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360202* -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
ACID HYDROLYSIS
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
CHLORIDES
CHLORINE COMPOUNDS
COHERENT SCATTERING
COLLOIDS
CRYSTAL GROWTH
CRYSTALLIZATION
CRYSTALS
DECOMPOSITION
DIFFRACTION
DISPERSIONS
ELECTRON MICROSCOPY
HALIDES
HALOGEN COMPOUNDS
HYDRATES
HYDROLYSIS
LYSIS
MATERIALS
MICROSCOPY
MINERALS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTICLE SIZE
PHASE STUDIES
PHASE TRANSFORMATIONS
POLYCRYSTALS
POWDERS
RADIOACTIVE MATERIALS
RADIOACTIVE MINERALS
RUTILE
SCATTERING
SIZE
SOLVOLYSIS
THERMOCHEMICAL PROCESSES
TITANIUM CHLORIDES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS
X-RAY DIFFRACTION