DETERMINATION OF SUBLIMATION PRESSURES OF A C-60/C-70 SOLID-SOLUTION

被引：38
|
作者：
PAN, C
CHANDRASEKHARAIAH, MS
AGAN, D
HAUGE, RH
MARGRAVE, JL
机构：
[1] RICE UNIV,DEPT CHEM,HOUSTON,TX 77251
[2] RICE UNIV,RICE QUANTUM INST,HOUSTON,TX 77251
[3] HOUSTON ADV RES CTR,THE WOODLANDS,TX 77381
来源：
JOURNAL OF PHYSICAL CHEMISTRY | 1992年 / 96卷 / 16期
关键词：
D O I：
10.1021/j100195a041
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
The sublimation pressures in equilibrium with a polycrystalline C60/C70 solid solution have been measured with a quartz crystal microbalance (QCM) and by transpiration methods, in the temperature range 772-857 and 806-929 K, respectively. The results from the two independent methods show good agreement. The solid solution was found to have a total vapor pressure of 8.1 X 10(-4) Torr at 800 K. It is estimated that the total vapor pressure of the C60/C70 solid solution could reach 1 atm at ca. 1523 K. The analyses of the compositions of C60 and C70 in the solid and vapor phases also reveal that C60 is more volatile than C70.
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收藏
页码：6752 / 6755
页数：4
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