FINE PARTICLE OF PITCH HAVING MICROSCOPIC OPTICALLY ANISOTROPIC STRUCTURE AND PRODUCTION THEREOF

PURPOSE:To provide fine pitch particles produced from a raw pitch, containing randomly distributed fine optically anisotropic structure, and useful for forming an isotropic carbon material, a C/C composite material, a UHP electrode, etc., having high strength and density. CONSTITUTION:The objective...

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Bibliographische Detailangaben
Hauptverfasser:	TAKEGAWA TOMEI, OKUYAMA YASUO, SHIODE TETSUO
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE FUELS FUSION REACTORS LIME, MAGNESIA LUBRICANTS MACHINE TOOLS METAL-WORKING NOT OTHERWISE PROVIDED FOR METALLURGY METALLURGY OF IRON NUCLEAR ENGINEERING NUCLEAR PHYSICS PEAT PERFORMING OPERATIONS PETROLEUM, GAS OR COKE INDUSTRIES PHYSICS PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OFWROUGHT-IRON OR STEEL PYROLIGNEOUS ACID REFRACTORIES SLAG SUCH WORKING COMBINED WITH OTHER FORMS OF WORKING OF METAL TECHNICAL GASES CONTAINING CARBON MONOXIDE TRANSPORTING TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS TREATMENT OF NATURAL STONE WORKING OF METAL BY THE ACTION OF A HIGH CONCENTRATION OFELECTRIC CURRENT ON A WORKPIECE USING AN ELECTRODE WHICH TAKESTHE PLACE OF A TOOL WORKING-UP PITCH, ASPHALT, BITUMEN, TAR
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Beschreibung
Zusammenfassung:	PURPOSE:To provide fine pitch particles produced from a raw pitch, containing randomly distributed fine optically anisotropic structure, and useful for forming an isotropic carbon material, a C/C composite material, a UHP electrode, etc., having high strength and density. CONSTITUTION:The objective fine pitch particles containing randomly distributed fine optically anisotropic structure in an amount of >=20vol.% and having an average particle diameter of 1-300mum can be produced by heat-treating a coal tar or petroleum pitch at about 350-500 deg.C in an inert gas atmosphere or introducing an inert gas into the reaction system.