Patent ID: 6013371
Filing Date: 2000-01-11
Classification: C04B,F02F,F05C,Y10T

Abstract:
A process for producing from coke, a moldable sinterable composition adapted for making near net shape carbon artifacts having a coefficient of thermal expansion less than about 15.times.10.sup.-6 reciprocal degrees Centigrade, said composition comprising carbon particles having a quinoline insolubles content of at least 20% by weight, and an average particle size of about 0.5-5 microns, said process comprising in combination:A. evaporating a pitch as necessary to provide a pitch having a carbon value of at least about 70, as measured by ASTM D2416 and a softening point of at least about 400 degrees F. (200 degrees C.);B. heat treating said pitch at about 250-450 degrees Centigrade for about 0.1-10 hours; and/or oxidizing at about 100-600 degrees Centigrade for about 0.1-10 hours to produce a carbon composition having a higher softening point than said pitch;C. prilling or spray-drying said composition;D. thereafter solidifying as necessary and comminuting to a median average particle size of 0.5-5 microns to produce said moldable sinterable carbon composition.