Abstract

La0.5Sr0.5Co1-xNixO3-delta (0<= x<= 0.6) ceramics were prepared using a conventional solid-state ceramic route. The thermal properties—thermal conductivity and heat capacity—of these ceramics were measured by the photopyroelectric technique. The thermal conductivity was found to increase with increasing Ni content. These materials were also found to exhibit a metallic-type variation of thermal conductivity with temperature, and no metal-insulator (M-I) transition was found to occur in any of the samples prepared by this route. However, a M-I transition was found to occur in La0.5Sr0.5CoO3-delta samples prepared by hot pressing. The difference is attributed to variations in oxygen content in the samples.

Department(s)

Mechanical and Aerospace Engineering

Sponsor(s)

University Grants Commission, New Delhi, India

Keywords and Phrases

Ceramics; Lanthanum Compounds; Metal-Insulator Transition; Pyroelectricity; Specific Heat; Stoichiometry; Strontium Compounds; Thermal Conductivity; Thermal Diffusivity

Document Type

Article - Journal

Document Version

Final Version

File Type

text

Language(s)

English

Rights

© 2003 American Institute of Physics (AIP), All rights reserved.

Full Text Link

Share

 
COinS