International Journal of Materials Chemistry and Physics
Articles Information
International Journal of Materials Chemistry and Physics, Vol.1, No.3, Dec. 2015, Pub. Date: Sep. 14, 2015
Structural and Electrical Properties of Li2O-TiO2 System in Presence of Water
Pages: 242-245 Views: 3426 Downloads: 1092
Authors
[01] R. Alvarez Roca, LIEC, Chemistry Deparment, Federal University of São Carlos, São Carlos-SP, Brazil.
[02] F. Guerrero Zayas, Physics Department, ICE, Federal University of Amazonas, Manaus-AM, Brazil.
Abstract
The influence of Li2O and humidity on structural and electrical properties of TiO2 ceramics are presented for two different concentrations (0.02 and 0.06 mol%). The X-Ray analysis shows a single phase compound for 0.02, due to the Li incorporation into the rutile, while the pattern for the 0.06 composition shows two phases. The structural effects are corroborated by Infrared Spectroscopy where the vibrational modes are discussed for each composition. The electrical behavior is also shown at room temperature and for each composition using a.c. measurement. The effect of Li2O addition on water adsorption mechanism as well as the humidity sensibility is analyzed. An equivalent circuit, from impedance spectroscopy, is proposed and the physical processes that take place inside the ceramic are described.
Keywords
TiO2, Humidity, Electrical Properties
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