Title

Effects of Thermal History on the Dielectric Properties of Nanostructured Titania

Abstract

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.

Department(s)

Materials Science and Engineering

Keywords and Phrases

Dielectric Properties; Sintering Conditions; Titania; Titanium Dioxide

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2007 Maney Publishing, All rights reserved.

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