Paper
Dielectric Properties and A.C. Conductivity of Nanocrystalline Titania
- Authors:
- Thomas Varghese; Mohammed E M; Smitha Thankachan; Sunny Joseph; Priyanka K P
- Abstract
- Nanocrystalline TiO2 with different particle sizes was prepared by a low temperature sol-gel synthesis route. The particle sizes were determined through X-ray diffraction technique. The dielectric properties of nanocrystalline TiO2 at different frequencies ranging from 20 Hz to 20 MHz have been studied over a temperature range 303 K-383 K. It is observed that the dielectric constant (ε’) and dielectric loss (tan δ) of all the samples decrease steeply as the frequency is increased and attains a constant lower value at high frequencies. The a.c. conductivity was derived from dielectric constant and loss tangent data. It has a low value at smaller frequencies, which increases as the frequency is increased.
- Keywords
- Nanotitania; Dielectric properties; A.c. conductivity
- StartPage
- 4
- EndPage
- 7
- Doi