| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that a conventional, highly oriented graphite, which is obtained by the treatment by heat and pressure of a laminate of the polyimide film synthesized from pyromellitic dianhydride and 4,4'-diaminodiphenyl ether(4,4'-oxydianiline), is inferior to the radiation reflecting property and thermal conductivity and hence is insufficient for a high performance radiation optical element and a high thermal conductor because the rocking property (the orientation) is larger than 0.45. <P>SOLUTION: The highly oriented graphite used for a radiation optical element and a high thermal conductor, having a thickness of not less than 0.1 mm to not more than 6 mm and a rocking property of not more than 0.44, is obtained by the treatment by heat and pressure of a laminate of the polyimide film of high birefringence. The manufacturing method for the highly oriented graphite comprises treating by heat and pressure a laminate of the polyimide film of high birefringence. Additionally, the increasing of a thickness of the raw material and the pressurizing during the carbonization lead to the high quality. <P>COPYRIGHT: (C)2006,JPO&NCIPI |
