Pengao Xu

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The effects of gas flow, rotational speed, refining time and still time on rotary impeller refinement of 4004 Al alloy have been studied. The results show that the rotational speed effect of rotary impeller refinement is superior to that of gas flow, refining time and still time. The optimum purification parameters are obtained by orthogonal analysis: rotor(More)
Knowledge of and control over the curvature of ripples in freestanding graphene are desirable for fabricating and designing flexible electronic devices, and recent progress in these pursuits has been achieved using several advanced techniques such as scanning tunnelling microscopy. The electrostatic forces induced through a bias voltage (or gate voltage)(More)
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