Title of article :
Bulk Electrical Properties of Titania as a Function of Different Concentrations of Y203 and Fe2O3 Additives
Author/Authors :
Ghosh، S. K. نويسنده , , SURESH، C. نويسنده , , RAO، P. PRABHAKAR نويسنده , , VASUDEVAN، ASHA K. نويسنده , , Warrier، K. G. K. نويسنده ,
Issue Information :
دوماهنامه با شماره پیاپی سال 1999
Abstract :
One and 10 mol% Y2O3 and Fe2O3 doped titanium dioxide precursor gels are prepared by sol-gel route. The calcined gels are pelletized and heated in the range 400° to 1000°C. The heated samples are characterized by electrical properties and XRD. Impedance spectra are taken for all the samples in the frequency range 5 Hx to 13 MHx. The impedance spectra reveal that Y2O3 addition inhibits the anatase to rutile transformation proportionately with the increase of concentration, whereas Fe2O3 addition enhances the conversion at lower concentration (1%). These results are supported by XRD.
Keywords :
Data smoothing , Hierarchical Bayes , Gamma prior distribution , Parametric empirical Bayes , Poisson sampling , Scram rate estimation , Reliability , Shrinkage
Journal title :
Transactions of the Indian Ceramic Society
Journal title :
Transactions of the Indian Ceramic Society
