Accession Number : AD0636613

Title :   THE LOW-TEMPERATURE SPECIFIC HEAT OF PALLADIUM CONTAINGING INTERSTITIAL HYDROGEN.

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Mackliet, Cleon A. ; Schindler,Albert L.

Report Date : 29 JUN 1966

Pagination or Media Count : 10

Abstract : Specific-heat measurements in the 1.2 to 4.2K range have been carried out on four H-Pd specimens having H/Pd atomic ratios of 0.57, 0.70, 0.81, and 0.88. Corresponding values of gamma (the electronic specific-heat coefficient) are 2.52 1.38, 1.40 and 1.61 millijoules per square degree per gram-atom of palladium; values of (the Debye temperature) are 282, 273, and 267K, respectively. A 'dynamic' method of measurement was necessarily employed because of the occurrence of an exothermic process in these alloys. The interpretation of the data was complicated by the interstitial character of these alloys, but the present results for the electronic specific heat appear to offer unusually direct support for the usual simple band picture of Pd and H-Pd alloys. Special care must be exercised in the interpretation of the Debye temperatures in this case. (Author)

Descriptors :   (*PALLADIUM, SPECIFIC HEAT), (*CRYOGENICS, PALLADIUM), HYDROGEN, IMPURITIES, THERMAL PROPERTIES, THERMODYNAMICS

Subject Categories : Thermodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE