THERMOELECTRIC MATERIALS
Abstract
Several compositions of the Cu2S-Cu2Te system were examined in both the liquid and solid states. Seebeck coefficient and resistivity measurements were made on samples containing 25, 50, and 75% Cu2Te. The Seebeck coefficient showed a peak at the solidification point in the 50-50 composition which corresponds to one observed in Cu2S. The 25 and 75% Cu2S compositions did not show this peak in the Seebeck coefficient. Resistivity of all the compositions was characterized by a relatively constant value in the liquid and a decreased value as solidification began. This decrease was quite sharp in the 50-50 mixture in the region of 910-950 C. Adding Cu2Te to Cu2S resulted in lowering the resistivity and the Seebeck coefficient of the sulfide; however, some improvement was noted in the thermoelectric parameters. Data were obtained on the thermal conductivity of Cu2S up to 950 C by using the Peltier method. The thermal conductivity in the liquid state is to be determined by using the comparison method with fused quartz as the reference material.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 28, 1961
- Accession Number
- AD0259101
Entities
People
- J.w. Johnson
Organizations
- SRI International