The precipitation of silica particles by the base catalyzed hydrolysis of TEOS (tetraethyl orthosilicate)

Technical Report · Fri Jan 01 00:00:00 EST 1988

DOI:https://doi.org/10.2172/5239765· OSTI ID:5239765

Bogush, G H

In this thesis, the conditions which lead to monodisperse silica particles are described. The data developed here lays the groundwork for future studies on the formation mechanism. The relevant literature on TEOS hydrolysis, nucleation of primary particles and possible growth mechanisms that could be involved in particle synthesis is reviewed in Chapter 2. The experimental procedures are described in Chapter 3. The experimental results are presented in Chapter 4. The effect of initial reagent concentrations and temperature on the final particle size and size distribution are explored. A seeded growth technique is presented that can be used to increase the particle size and mass fraction of the suspension without effecting the monodispersity. Also, kinetic data of particle growth is presented. Chapter 5 compares the kinetic data to the classical nucleation and growth mechanism. Finally, the conclusions and recommendations for future work are presented in Chapter 6.

• Research Organization: Illinois Univ., Urbana, IL (USA). Graduate Coll.
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC02-76ER01198
• OSTI ID: 5239765
• Report Number(s): DOE/ER/01198-T39; ON: DE90005223
• Resource Relation: Other Information: Thesis (M.S.)
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
SILICATES
HYDROLYSIS
SILICON OXIDES
SYNTHESIS
KINETICS
MICROSTRUCTURE
NUCLEATION
PARTICLE SIZE
PRECIPITATION
CHALCOGENIDES
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
DECOMPOSITION
LYSIS
OXIDES
OXYGEN COMPOUNDS
SEPARATION PROCESSES
SILICON COMPOUNDS
SIZE
SOLVOLYSIS
400201* - Chemical & Physicochemical Properties