Specific heat of graphite

Regress a third order polynomial (cp = a + bT -h cT + dT ) to results of the equation for the heat capacity at constant pressure for graphite reported in Rutland, A.T.D. and Maddison, RJ. (1973). The specific heat of graphite an evaluation of measurements. J. NucL Mater., 49, 45-56 ... 

Figure 2.24 Schematic plot of the specific heat of graphite. Source Reprinted with permission from Ubbelohde AR, Lewis FA, Graphite and its Crystai Compounds, Oxford, 1960. Copyright 1960, Oxford University Press.

Figure 3.8. Specific heat of graphite vs. temperature at one atmosphere,...

J. Krumhansl and H. Brooks, The Lattice Vibration Specific Heat of Graphite , Journal of Chemical Physics Tf, 1663 (1953). 

Particle-size effect of the specific heat of graphite at low temperatures. J. Phys. Chem. Solids 6, 380 (1958). 

The specific heats of diamond and graphite are reduced to 19 and Tx() respectively between the ordinary temperature and the boiling-point of liquid hydrogen the specific heats of the substances between the temperatures of liquid air and liquid hydrogen are in fact less than those of any other substances, even less than that of a gas at constant volume. 

The specific heat of both diamond and graphite decreases sharply on cooling to 90° K. Using diamond as an example, values are listed in Table II at several... 

The specific heats of resin-based composites reinforced with glass, graphite, and boron are considered together. Curve-fitting trials were performed on the low-temperature data for S-glass/resin, and the results were applied to the analysis of the data for the other two composites. The intermediate-temperature results are presented as-measured. In the absence of any guidelines on the temperature dependence of the specific heat from 80 to 300 K, no attempt was made to adjust the data to the standard temperatures of 80.0 and 300.0 K. 

SPECIFIC HEAT OF ETHYL AND TERT-BUTYL ALCOHOLS IN ADSORPTION LAYERS ON GRAPHITIZED CARBON BLACK. 

SPECIFIC HEAT OF N-PROPANOL ADSORBED ON GRAPHITIZED THERMAL CARBON BLACK. 

The specific heat of diamond is generally comparable to that of graphite and is higherthan most metals (see Ch. 3, Sec. 4.3 and Table 3.5). The specific heat of diamond, like that of all elements, increases with temperature (see Table 11.3). 

SwietoslawsM, W. Microcalorimetry. New York Reinhold Publ. 1946. Tadokoro, H., Kobayashi, M., Kawaguchi, Y., Kobayashi, A., Murabariii, S. Normal vibrations of the polymer molecules of helical configuration. III. Poly-oxymethylene and polyoxymethylene-d,. J. Chem. Phys. 38, 703 (1963). Tarasov, V. V. The theory of the specific heat of high polymers. II. Rubber, graphite, Comptes Rend. Acad. Sci. U.R.S.S. 46, 110 (1945). 

At RT, thermal conductivities of carbon fiber composites with high tensile fibers differ from those of high modulus fibers and are much higher than the thermal conductivity of the epoxy matrix. Below 7 K, they become similar within 25% and lower than the thermal conductivity of the epoxy matrix (37,47). The similarity is owing to the fact that at low temperatures only long phonon wavelengths are activated they cannot resolve different graphite microstructures of different carbon fiber types which are dominant at RT (36,43). In most cases, the specific heat of composites is lower than that of the polymeric matrix. 

Carbon Composites. Cermet friction materials tend to be heavy, thus making the brake system less energy-efficient. Compared with cermets, carbon (or graphite) is a thermally stable material of low density and reasonably high specific heat. A combination of these properties makes carbon attractive as a brake material and several companies are manufacturing carbon fiber—reinforced carbon-matrix composites, which ate used primarily for aircraft brakes and race cats (16). Carbon composites usually consist of three types of carbon carbon in the fibrous form (see Carbon fibers), carbon resulting from the controlled pyrolysis of the resin (usually phenoHc-based), and carbon from chemical vapor deposition (CVD) filling the pores (16). 

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