Accession Number : AD0435903

Title :   FREQUENCY AND TEMPERATURE RESPONSE OF THE POLARIZATION OF BARIUM TITANATE,

Corporate Author : MASSACHUSETTS INST OF TECH CAMBRIDGE LAB FOR INSULATION RESEARCH

Personal Author(s) : Ballantyne,Joseph M.

Report Date : MAR 1964

Pagination or Media Count : 37

Abstract : The frequency and temperature response of the polarization of BaTiO3 from 0 to 1000 reciprocal cm and between 24 and 200 C was determined by transmission and reflectivity measurements. The infrared transmission of thin single-crystal BaTiO3 was recorded from 250 to 4000 reciprocal cm; a single absorption band located at 491 reciprocal cm was observed. The reflectivity of single-domain BaTiO3 was measured continuously from 10 to 4000 reciprocal cm, and at points of 0.77, 5, and 10 reciprocal cm. A drop in reflectivity occurs from 10 to 70 reciprocal cm and absorption bands are located near 175 and 470 reciprocal cm. Measurements of the dielectric constant of single-domain crystals at 0.77 reciprocal cm (24 kMc) yielded permittivities of about 1500, indicating no relaxation from the low-frequency dielectric constant. (Author)

Descriptors :   (*BARIUM COMPOUNDS, TITANATES), (*TITANATES, POLARIZATION), DIELECTRIC PROPERTIES, FERROELECTRICITY, INFRARED SPECTROSCOPY, MICROWAVE SPECTROSCOPY, INTERFEROMETERS, SPECTROPHOTOMETERS, FREQUENCY, TEMPERATURE, REFLECTION, SINGLE CRYSTALS, LIGHT TRANSMISSION

Distribution Statement : APPROVED FOR PUBLIC RELEASE