Effects of Thermal History on the Dielectric Properties of Nanostructured Titania
Titania (TiO2) bulk ceramics were densified at various temperatures (850°C-1200°C) by using two different kinds of ultrafine powders (<50nm). Samples sintered at low temperature (850°C-900°C) exhibited a nano-sized grain structure (200-300nm grain size) with high relative density (>98%). Scanning Electron Microscopy (SEM) revealed that the fracture mode is different for samples sintered from different starting powders. Leakage current and polarization versus electric field relationship (P-E) were measured and found to be strongly depending on the sintering conditions. Dielectric constant, dielectric loss and dielectric breakdown strength (BDS) were also measured and correlated with samples' sintering conditions, defects chemistry and microstructure.
S. Shao et al., "Effects of Thermal History on the Dielectric Properties of Nanostructured Titania," Materials for Energy Applications: Selected Proceedings from MS&T'07, Maney Publishing, Jan 2007.
Materials Science and Engineering
Keywords and Phrases
Dielectric Properties; Sintering Conditions; Titania; Titanium Dioxide
Article - Journal
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