Aggregation of spheres from hydrogenated mesophase pitches.
نویسندگان
چکیده
منابع مشابه
Production of Mesophase Pitch from Coal Tar and Petroleum Pitches using Supercritical Fluid Extraction
Supercritical fluid extraction (SFE) is currently being investigated as a possible technique in the production of high quality mesophase pitch from coal tar and petroleum pitches. Mesophase pitch is used to make high technology products, such as carbon fibre. The conventional production of mesophase pitch initially involves the removal of low molecular weight species from coal tar and petroleum...
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Mesophase spheres were prepared through homogeneous and heterogeneous nucleation from two coal tar pitches with some and nearly without quinoline insolubles. The pitches suffered thermal condensation in a stainless steel reactor at 440 and 410 for 1 or 7h, respectively. SEM was introduced as a useful tool to detect the structures of the two kinds of mesophase spheres. As a result of the paper, ...
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The transformation of anthracene oil into pitch is a feasible procedure for obtaining pitches with binder and impregnating characteristics. Moreover, their high aromaticity, total absence of solid particles and good fluidity make anthracene oil-based pitches interesting precursors for graphitizable carbon materials (e.g., carbon fibres, synthetic graphites). To prepare this kind of material the...
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We investigate correlations among pitches in several songs and pieces of piano music by mapping them to one-dimensional walks. Two kinds of correlations are studied, one is related to the real values of frequencies while they are treated only as different symbols for another. Long-range power law behavior is found in both kinds. The first is more meaningful. The structure of music, such as beat...
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I n baseball, a pitcher’s fame and fortune depend on his mastery of the strike zone. Pitches that pass outside the strike zone count as balls and can be safely ignored. Those that pass through it untouched, however, count as strikes, three of which will retire the batter to his team’s dugout. Players, fans, and sports journalists thus have an intense interest in compiling statistics about these...
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ژورنال
عنوان ژورنال: NIPPON KAGAKU KAISHI
سال: 1987
ISSN: 2185-0925,0369-4577
DOI: 10.1246/nikkashi.1987.90