Process for producing formed carbon articles
Abstract
Abstract AN INEXPENSIVE TAR OR PITCH IS TRANSFORMED BY A KNOWN TREATMENT INTO A MODIFIED PITCH HAVING A HYDROGEN-TOCARBON ATOMIC RATION OF FROM 0.2 TO 0.6 AND A SOFTENING POINT OF AT LEAST 170 DEGREES C., WHICH MODIFIED PITCH IN GRANULAR FORM IS PRESSURE FORMED INTO A FORMED ARTICLE, WHICH IS THEN TREATED IN AN IN ERT GAR, WHEREUPON A CARBON FORMED ARTICLE HAVING A GRAPHITIZATION CHARACTERISTIC IN THE RANGE OF FROM EASY GRAPHITIZABILITY TO DIFFICULT GRAPHITIZABILITY AND A STRUCTURAL TEXTURE IN THE RANGE OF FROM GLASS-LIKE STATE TO POROUS STATE IS OBTAINED. PRIOR TO CARBONIZATION, THE FORMED ARTICLE IS PREFERABLY HEATED IN AN OXYGEN-CONTAINING ATMOSPHERE TO TEMPERATURE OF ABOUT 200 TO 330*C.
Inventors
- 👤 Sugio Otani
Bibliographic Details
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