Microstructure and Dielectric Properties of Nanostructured TiO₂ Ceramics Processed by Tape Casting
Microstructure and dielectric properties of nanostructured TiO2 ceramics processed by tape casting
Effects of different solvent systems and dispersant on tape casting slurries of TiO2 nanopowders (∼40nm) were studied by rheological measurements. It was found that Xylene/Ethanol with phosphate ester (PE) as dispersant gave the best dispersion quality which resulted in highly homogenous, dense, smooth and crack-free tapes. The presence of phosphate ester inhibited the sintering of TiO2 powders and refined the grain size. Sintered tapes with 200-300nm grain size and relative density over 90%, had dielectric constant ∼100, dielectric loss less than 1% and dielectric breakdown strength (BDS) over 1000KV/cm.
S. Chao et al., "Microstructure and Dielectric Properties of Nanostructured TiO₂ Ceramics Processed by Tape Casting," Ceramic Engineering and Science Proceedings, American Ceramic Society, Jan 2009.
Materials Science and Engineering
Keywords and Phrases
Nanopowders; Rheological Measurements; Titanium dioxide
International Standard Serial Number (ISSN)
Article - Conference proceedings
© 2009 American Ceramic Society, All rights reserved.
01 Jan 2009