| 摘要 |
PURPOSE:To obtain quickly and inexpensively a graphite crystal having high orientation characteristic being suitable as a host material for an intercalated compd. of graphite by calcining previously a molded body of a thermosetting resin, and subjecting the molded thermosetting resin to hot hydrostatic pressing after completing the previous calcination while leaving H2. CONSTITUTION:A molded body of a thermosetting resin (e.g., phenolformaldehyde resin) is calcined previously and the previous calcination is completed while H2 remains. Suitable H2 concn. to be left is 50-5000ppm. A graphite crystal having high orientation characteristic is obtd. by subjecting the obtained previously calcined product to hot hydrostatic pressure treatment, suitably at 2000-3000 deg.C, 1000-3000atm. It is preferred to elevate the pressure to a specified pressure at a temp. <= the previous calcination temp., then elevating the temp. to a specified temp. Thus, a large sized graphite crystal is obtd. stably, and novel field of use of graphite wafer for epitaxial growth can be developed. |
