TY  - BOOK
AU  - Rao,C.N.R.
AU  - Subba Rao,G.V.
AU  - Ramdas
TI  - Phase Transformations and Electrical Properties of Bismuth Sesquioxide
N2  - Phase transformations of BieOs have been studied by differential thermal analysis. The enthalpy and activation energy of the monoclinic-cubic transformation are 8.8 and 110 kcal mol-', respectively. The enthalpies of the cubic-tetragonal and tetragonal-monoclinic transformations are estimated to be 6.7 and 2.1 kea1 mol-'. The electrical conductivity of BiiOs shows marked changes in conductivity at temperatures where the phase transformations occur. In addition, Bi203 shows a change in slope in the log a-l/T curve due to a change from p-type to n-type behavior; this observation is supported by the change in sign of the Seebeck coefficient, p, around the same temperature. /3 changes sign at lower temperatures as the oxygen partial pressure is reduced. The band model seems to be applicable in the case of BieOa
UR  - https://drive.google.com/file/d/1rH8pZjN4mOK1fZcOxx6l6CQKjRpHlBt-/view?usp=drivesdk
ER  -