✦ LIBER ✦

Formation of carbonaceous mesophase at lower temperature

✍ Scribed by T. Imamura; M. Nakamizo; H. Honda

Publisher: Elsevier Science
Year: 1978
Tongue: English
Weight: 489 KB
Volume: 16
Category: Article
ISSN: 0008-6223
DOI: 10.1016/0008-6223(78)90097-0

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✦ Synopsis

The effects of heat-treatment at lower temperature on the formation of carbonaceous mesophase were studied. Heat-treatments of QS pitch below 340°C and of KF asphalt below 370°C lead to the formation of mesophase spherules having a different structure from those found previously. For QS pitch, the lowest temperature of mesophase formation was 290°C but more than one month was required for heat-treatment. The structure of the fourth-type spherule is proposed from the microscopic observations and its orientational behavior in a magnetic field. The structure of this type is very similar to that of the Brooks-Taylor-type one, and it is believed that the fourth-type spherule is a meta-stable phase of the Brooks-Taylor-type one.

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