ABSTRACTS 713 24. High density isotropic graphite G. R. Peterson (Nuclear Division, Union Carbide Corporation, Oak Ridge, Tennessee).
A description of the fabrication techniques used in producing a high density isotropic graphite will be presented. In addition to having a uniform fine grain structure, the resultant material was essentially fully ordered graphite and had a very low gas permeability. A review of the physical properties will be given.
25. Carbon foam fabrication technology
V. B. Campbell (Nuclear Division, Union Carbide Corporation, Oak Ridge, Tennessee). Rigid, cellular carbon foam was fabricated from a urethane foam and thermosetting carbon precursor in a density range of O-02-0.80 g/cc. Carbon foams were pyrolyzed to 1000Β°C or graphitized to 2500Β°C. Methods of carbon foam fabrication and the physical and mechanical properties of the material produced will be presented.
26. Effect of heat treatments of porous carbon cathodes for molten salt reactions
J. L. Benak, J. E. Metcalfe and J. W. Sprague (Research and Develofnnent Department, The Standard Oil Company, Cleveland, Ohio). Porous active carbon electrodes are used as cathodes in a fused salt secondary battery. Carbon electrodes are derived from polyvinylidene chloride, wood, graphite, and activated graphite carbon types. Data are presented on the effect of various heat treatments on the pore size distribution, BET surface area, and crystallite size, correlated to electrochemical performance of the carbon electrodes. Increase in temperature treatments produces increased crystallite size and decreased pore size, BET surface area, and electrochemical performance. Electrochemical capacity decreases as the carbon undergoes a transition from an activated to a graphitic type.
27. Recent developments in glassy carbon fabrication
W.