Baidakov Vladimir G, Kaverin Aleksey M, Andbaeva Valentina N
Institute of Thermal Physics, Urals Branch of Russian Academy of Sciences, Ekaterinburg, Russia.
J Phys Chem B. 2008 Oct 16;112(41):12973-5. doi: 10.1021/jp806048e. Epub 2008 Sep 18.
The method of lifetime measurement has been used to investigate the kinetics of spontaneous boiling-up of superheated argon-helium and argon-neon solutions. Experiments were made at a pressure of p = 1.5 MPa and concentrations up to 0.33 mol% in the range of nucleation rates from 10 (4) to 10 (8) s (-1) m (-3). The homogeneous nucleation regime has been distinguished. With good agreement between experimental data and homogeneous nucleation theory in temperature and concentration dependences of the nucleation rate, a systematic underestimation by 0.25-0.34 K has been revealed in superheat temperatures over the saturated line attained by experiment as compared with theoretical values calculated in a macroscopic approximation. The revealed disagreement between theory and experiment is connected with the dependence of the properties of new-phase nuclei on their size.
采用寿命测量方法研究了过热氩 - 氦和氩 - 氖溶液的自发沸腾动力学。实验在压力p = 1.5 MPa下进行，成核速率范围为10(4)至10(8) s(-1) m(-3)，浓度高达0.33 mol%。已区分出均匀成核状态。实验数据与均匀成核理论在成核速率的温度和浓度依赖性方面吻合良好，但与宏观近似计算的理论值相比，实验测得的饱和线上方的过热度存在0.25 - 0.34 K的系统低估。理论与实验之间所揭示的差异与新相核的性质对其尺寸的依赖性有关。
