Experimental measurement of thermodynamic state variables of aluminium by laser stepwise photoionization method

摘要

The measurement of thermodynamic slate variables (vapor pressure P, standart enthalpy of vaporization #DELTA#H deg (T), entropy of vaporization #DELTA#S deg (T), standard free energy #DELTA#G deg (T), and specific heat capacity #DELTA#C_p(T)) of saturated vapor of metallic aluminum has been carried out by the method of laser resonance stepwise excitation of Al atom and its ionization under electric field as a result of investigation of vapor velocity in a vacuum. The accuracy of the given method is greater in two orders than the methods known before.