INVESTIGATION OF RARE-EARTH DOPED BARIUM TITANATE

Journal Article · Sat Apr 01 04:00:00 EST 1961 · Journal of the American Ceramic Society (U.S.)

DOI:https://doi.org/10.1111/j.1151-2916.1961.tb13742.x· OSTI ID:4050771

Tennery, V J; Cook, R L

The effect of additions of 0.0015 to 0.0030 mole fraction of rare earth oxides on the d-c resistivity of sintered barium titanate was investigated. The substitution may be represented by (X/sub 2/O/sub 3/)M (BaTiO/sub 3/)/sub 1-M/, where X is the rare earth. The rare earths samarium, gadolinium, and holmium were introduced singly into the titanate, and the resistivity was measured as a function of temperature from -170 deg to +330 deg C. An anomalous increase near the tetragonal -- cubic transition temperature at 120 deg C occurred which in some cases amounted to an increase in the resistivity of 4000 times the value in the tetragonal phase. The thermoelectric power of the material changed sign at the Curie temperature. The tetragonal phase exhibited n-type behavior whereas the cubic phase was p-type. The rhombohedral and orthorhombic phases exhibited conduction activation energies of the order of 0.2 ev whereas that in the tetragonal phase was approximately 0.1 ev. (auth)

• Research Organization: Univ. of Illinois, Urbana
• Sponsoring Organization: USDOE
• NSA Number: NSA-15-014770
• OSTI ID: 4050771
• Journal Information: Journal of the American Ceramic Society (U.S.), Journal Name: Journal of the American Ceramic Society (U.S.) Vol. Vol: 44; ISSN JACTA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

BARIUM
BARIUM OXIDES
CONFIGURATION
ELECTRIC CONDUCTIVITY
ENRICHMENT
EXCITATION
GADOLINIUM
HOLMIUM
LATTICES
MEASURED VALUES
METALS, CERAMICS, AND OTHER MATERIALS
OXIDES
PHASE DIAGRAMS
POWER
RARE EARTHS
SAMARIUM
TEMPERATURE
THERMOELECTRICITY
TITANIUM OXIDES
TRANSIENTS