Dielectric, electromechanical, optical, and mechanical properties of lanthanum-modified lead titanate ceramics

Journal Article · Sun May 01 00:00:00 EDT 1983 · J. Am. Ceram. Soc.; (United States)

DOI:https://doi.org/10.1111/j.1151-2916.1983.tb10050.x· OSTI ID:5781245

Yamamoto, T; Igarashi, H; Kiyoshi, O

Dielectric, electromechanical, optical, and mechanical properties of hot-pressed lanthanum-modified PbTiO/sub 3/ ceramics were measured as a function of crystal tetragonality, c/a, in a range of tetragonal-to-cubic phases. The results obtained in this study are summarized as follows: The c/a changes linearly as a function of lanthanum content. Similarly, Curie point changed linearly and remanent polarization, coercive field, and coupling factors decreased with decreasing c/a. The sample with c/a = 1,010 showed the maximum transmittance of 61% wavelengths above 600 nm. The internal stress measured using the microindentation technique decreased with decreasing c/a in the tetragonal region and was zero in the cubic region.

• Research Organization: Department of Electrical Engineering, The National Defense Academy, Yokosuka 339
• OSTI ID: 5781245
• Journal Information: J. Am. Ceram. Soc.; (United States), Vol. 66:5
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
LANTHANUM ADDITIONS
CRYSTAL STRUCTURE
CURIE POINT
DIELECTRIC PROPERTIES
ELECTROMECHANICS
MECHANICAL PROPERTIES
OPTICAL PROPERTIES
STRESSES
LEAD COMPOUNDS
TITANATES
ALLOYS
ELECTRICAL PROPERTIES
LANTHANUM ALLOYS
MECHANICS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
RARE EARTH ADDITIONS
RARE EARTH ALLOYS
THERMODYNAMIC PROPERTIES
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE
360603* - Materials- Properties