TITLE

Conductivity mechanism analysis at high temperature in bismuth titanate: A single crystal with sillenite-type structure

AUTHOR(S)
Lanfredi, S.; Nobre, M. A. L.
PUB. DATE
February 2005
SOURCE
Applied Physics Letters;2/21/2005, Vol. 86 Issue 8, p081916
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Conductivity behavior of the Bi12TiO20 single crystal was investigated by the electric modulus spectroscopy, which was carried out in the frequency range from 5 Hz to 13 MHz and at temperatures higher than 400 °C. The resistance curve exhibits a set of properties correlated to a negative temperature coefficient thermistor. In the temperature range investigated, the characteristic parameter (β) of the thermistor is equal to 4834 °C. Temperature coefficients of the resistance (α) were derived being equal to -3.02×10-2 °C-1 at 400 °C and equal to -9.86×10-3 °C-1 at 700 °C. The nature of the electric relaxation phenomenon and magnitude dc conductivity are approached.
ACCESSION #
16581320

 

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