Positive temperature coefficient of resistivity effect in undoped, atmospherically reduced barium titanate

Journal Article · Sun Jan 01 04:00:00 EST 1989 · Journal of the American Ceramic Society; (USA)

DOI:https://doi.org/10.1111/j.1151-2916.1989.tb05970.x· OSTI ID:5212591

Alles, A B; Amarakoon, V R.W.; Burdick, V L ^[1]

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1. N.Y. State College of Ceramics at Alfred Univ., Alfred, NY (US)

The authors describe their observation of a sharp positive temperature coefficient of resistivity effect for undoped, fluorinated BaTiO/sub 3-x/ samples. The qualitative agreement between the behavior of BaTiO/sub 3-x/ and La-doped BaTiO/sub 3/, with respect to the trap density at the boundaries suggests that in the absence of counterdopants such as Mn, the main origin of surface acceptor states is chemisorbed gases. Impedance analysis indicates that, under the conditions of the present work, fluorine seems not to diffuse in significant amounts into the lattice. The treatment of the fluorinated samples in inert/reducing atmospheres did not markedly decrease the resistivity jump, suggesting that fluorine might be chemisorbed more strongly than oxygen.

• OSTI ID: 5212591
• Journal Information: Journal of the American Ceramic Society; (USA), Journal Name: Journal of the American Ceramic Society; (USA) Vol. 72:1; ISSN JACTA; ISSN 0002-7820
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360202 -- Ceramics
Cermets
& Refractories-- Structure & Phase Studies
360204* -- Ceramics
Cermets
& Refractories-- Physical Properties
640302 -- Atomic
Molecular & Chemical Physics-- Atomic & Molecular Properties & Theory
74 ATOMIC AND MOLECULAR PHYSICS
ALKALINE EARTH METAL COMPOUNDS
ALLOYS
ATOM TRANSPORT
BARIUM COMPOUNDS
BARIUM OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
DIFFUSION
DOPED MATERIALS
ELECTRIC IMPEDANCE
ELEMENTS
FLUORINATION
FLUORINE
HALOGENATION
HALOGENS
IMPEDANCE
LANTHANUM ADDITIONS
LANTHANUM ALLOYS
MANGANESE ADDITIONS
MANGANESE ALLOYS
MATERIALS
NEUTRAL-PARTICLE TRANSPORT
NONMETALS
OXIDES
OXYGEN COMPOUNDS
RADIATION TRANSPORT
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
REACTIVITY COEFFICIENTS
TEMPERATURE COEFFICIENT
TITANATES
TITANIUM COMPOUNDS
TITANIUM OXIDES
TRANSITION ELEMENT COMPOUNDS