Dielectric spectroscopy was performed on polycrystalline C₆₀ powder as the temperature rose from 100 K to 473 K. About 3 K increase of the first-order phase transition temperature caused by quenching was observed, but disappeared in the second heating cycle. The apparent activation energy of dipole relaxation in low temperature range increases to 387±4meV which is 19 meV higher than that of pristine C₆₀. Meanwhile, a novel grain boundary(GB) relaxation was also found in the quenched C₆₀. It is suggested that quenching increase the GB viscosity, which facilitates the coupling between the GB motion and C₆₀ orientation jump.

中文翻译：

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淬火诱导多晶C _60中分子取向与晶界弛豫之间偶联的增强

当温度从100 K升高到473 K时，对多晶C ₆₀粉末进行了介电谱分析。观察到由淬火引起的一级相变温度升高了约3 K，但在第二次加热循环中消失了。低温范围内偶极弛豫的表观活化能增加到387±4meV，比原始C ₆₀高19meV 。同时，在淬火的C _60中也发现了新的晶界（GB）弛豫。建议淬火增加GB粘度，这有助于GB运动和C ₆₀取向跳跃之间的耦合。