Electrophoretic and Electrolytic Deposition of Ceramic Particles on Porous Substrates
Abstract
Electrophoretic deposition of ceramic particles on porous graphite and their penetration into the pores was demonstrated and studied both theoretically and experimentally/ The theoretical analysis enables to predict the penetration depth of the particles as function of two non-dimensional parameters based on solvent properties, field strength and particle size and concentration. In the experimental studies the amount of induced material was found to increase with the ratio of dielectric constant to viscosity of the solvent, as well as with particle concentration and field intensity. However, due to simultaneous buildup of an overlying deposit penetration as function of deposition time reaches a plateau. In parallel studies on electrolytic deposition, ZrO2 coatings were deposited on porous graphite from an aqueous solution of ZrO(NO3)2. The deposition kinetics and microstructure of the deposit were studied. The initial amorphous deposits transformed into crystalline ZrO2 polymorphs with nanocrystalline dimensions following heat treatment.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 30, 1990
- Accession Number
- ADA227371
Entities
People
- L. Gal-or
- S. Haber
- S. Liubovich