ELECTRICAL-PROPERTIES OF MANGANESE-DOPED TITANIUM-DIOXIDE

The electrical conductivity and Seebeck coefficient for TiO2 doped wit h varying amounts of MnO2 have been measured over the temperature rang e of 900 degrees-1100 degrees C. The Hall coefficient was also measure d over the temperature range of 300 degrees-500 degrees C. The electri cal conductivity and carrier density were found to decrease initially, go through a minimum at approximately x = 0.0001-0.001, and then incr ease with increasing content of MnO. For dopant levels above 0.01 at.% , p-type electrical conduction behavior was observed.