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On the evaporation of C60 in vacuum and inert gases at temperatures between 830 K and 1050 K

机译:在830 K和1050 K之间的温度下真空和惰性气体中C60的蒸发

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The binary diffusion coefficient D_(AB) of subliming C_(60) in He, N_2 and Ar gas has been determined at a gas pressure between 5 and 10 kPa. It resulted D_(AB)/(cm~2/s) = D_o(P_o/Pt)(T/T_o) n as a function of the total pressure Pt of the vapor phase and temperature T. At T_o = 273 K and P_o = 1.0133×105 Pa, the values D_o = (0.059±0.004) cm2/s, (0.011±003) cm~2/s, (0.012±0.007) cm~2/s, n = 1.77±0.06, 2.02±0.18, 1.77±0.37 were obtained for He, N_2, Ar and (830-1000) K, (800-1020) K, (875-1095) K, respectively. Only 40 wt% of the initial C_(60) material yielded reliable D_(AB) where the vapor pressure of C_(60) followed log_(10)(P/Pa) = -(8976±60)/T/K+(11.05±0.07) for T between 640 and 1055 K.
机译:已在5至10 kPa的气压下确定了升华C_(60)在He,N_2和Ar气体中的二元扩散系数D_(AB)。结果得出D_(AB)/(cm〜2 / s)= D_o(P_o / Pt)(T / T_o)n作为气相总压力Pt和温度T的函数。在T_o = 273 K和P_o = 1.0133×105 Pa,值D_o =(0.059±0.004)cm2 / s,(0.011±003)cm〜2 / s,(0.012±0.007)cm〜2 / s,n = 1.77±0.06,2.02±0.18对于He,N_2,Ar和(830-1000)K,(800-1020)K,(875-1095)K分别获得1.77±0.37。初始C_(60)材料中只有40 wt%产生可靠的D_(AB),其中C_(60)的蒸气压遵循log_(10)(P / Pa)=-(8976±60)/ T / K +(11.05)对于640至1055 K之间的T,为±0.07)。

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