Accession Number : AD0430154


Title :   HIGH-TEMPERATURE THERMAL CONDUCTIVITY MEASUREMENTS OF IMPURE INDIUM ANTIMONIDE,


Corporate Author : SOUTH DAKOTA SCHOOL OF MINES AND TECHNOLOGY RAPID CITY


Personal Author(s) : RODENBERG,Orville C


Report Date : 01 Oct 1963


Pagination or Media Count : 59


Abstract : A series comparison method was employed in measuring thermal conductivity and effects of a magnetic field on transport properties of one sample of Bi8Te7S5 and on three heavily doped samples of p-type InSb. In each experimental run, a sample was sandwiched between two standards of Inconel 702, with low resistance thermal and electrical contacts provided by a cement composed of sodium silicate and graphite. Thermocouples of platinum and platinum plus ten percent rhodium were employed in measuring temperatures. Measurements were carried out in a vacuum of approximately 6(10) to the -5th power Torr. For each sample of InSb, the electronic contribution was calculated and then subtracted from the total to obtain the lattice thermal conductivity; the reciprocal of this is the lattice thermal resistivity W sub g. Contributions to W sub g from phonon scattering by phonons, impurities, and holes were estimated. Measurements of the relative change of thermal conductivity, electrical resistivity, and Seebeck coefficient were performed on all samples in a magnetic field of 8300 Gauss. In addition, the relative change in electrical resistivity was determined at 296 K on Bi8Te7S5 in fields ranging from 1000 to 8300 Gauss. (Author)


Descriptors :   *INDIUM COMPOUNDS , *THERMAL CONDUCTIVITY , ANTIMONY COMPOUNDS , MEASUREMENT , MAGNETIC FIELDS , ELECTRICAL RESISTANCE , EXPERIMENTAL DATA , HEATERS , TEMPERATURE , MATERIALS , STANDARDS , SAMPLING , BISMUTH COMPOUNDS , TELLURIUM COMPOUNDS , SULFUR COMPOUNDS


Distribution Statement : APPROVED FOR PUBLIC RELEASE