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V 2 O 3 ‐Polymer Composite Thermistors
Author(s) -
HU K. A.,
MOFFATT DAWNE,
RUNT JAMES,
SAFARI AHMAD,
NEWNHAM ROBERT
Publication year - 1987
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1987.tb05710.x
Subject(s) - thermistor , temperature coefficient , materials science , composite number , electrical resistivity and conductivity , composite material , semiconductor , polymer , metal , insulator (electricity) , phase (matter) , chemistry , metallurgy , electrical engineering , optoelectronics , organic chemistry , engineering
V 2 O 3 was incorporated into polymer matrices to produce composite materials with low room‐temperature resistivities and sizable positive temperature coefficient (PTC) resistance effects. In addition, a negative temperature coefficient effect, associated with the semiconductor‐to‐metal phase transition in V 2 O 3 , was also observed. The resistivity vs temperature curve for these composites resembles a square well with three temperature regimes in which the composite behaves like a semiconductor, a metal, and an insulator. The intensity of the PTC effect for these composites was found to be as large as 10 orders of magnitude.