The effect of temperature on the electric conductivity property of Bi3Zn2Sb3O14 pyrochlore type phase

The electric conductivity characteristic of (ProQuest: Formulae and/or non-USASCII text omitted; see image) ceramics was investigated by impedance spectroscopy in the frequency range from 5 Hz to 13 MHz. Electric measurements were performed at temperatures in the range from 25 to 700 °C. The phase type pyrochlore (ProQuest: Formulae and/or non-USASCII text omitted; see image) was synthesized by the polimeric precursors method. Ceramic presenting a relative density of 98% of the theoretical density was prepared. The data were presented in Nyquist diagrams form, from which the electric resistivity was determined. The electric conductivity followed the Arrhenius law with an apparent activation energy of the conduction process equal to 1.37 eV. The electric conductivity at room temperature was determined by extrapolation being equal to (ProQuest: Formulae and/or non-USASCII text omitted; see image). Between 400 and 700 °C, the conductivity values were (ProQuest: Formulae and/or non-USASCII text omitted; see image) and (ProQuest: Formulae and/or non-USASCII text omitted; see image), respectively.[PUBLICATION ABSTRACT]