难熔化合物汽相成核的实验研究。VI. 钠的冷凝

Experimental studies of the vapor phase nucleation of refractory compounds. VI. The condensation of sodium.

作者信息

Martínez Daniel M, Ferguson Frank T, Heist Richard H, Nuth Joseph A

机构信息

Department of Chemical Engineering, University of Rochester, Rochester, New York 14627, USA.

出版信息

J Chem Phys. 2005 Aug 1;123(5):054323. doi: 10.1063/1.1998834.

DOI:10.1063/1.1998834

PMID:16108655

Abstract

In this paper we discuss the condensation of sodium vapor and the formation of a sodium aerosol as it occurs in a gas evaporation condensation chamber. A one-dimensional model describing the vapor transport to the vapor/aerosol interface was employed to determine the onset supersaturation, in which we assume the observed location of the interface is coincident with a nucleation rate maximum. We then present and discuss the resulting nucleation onset supersaturation data within the context of nucleation theory based on the liquid droplet model. Nucleation results appear to be consistent with a cesium vapor-to-liquid nucleation study performed in a thermal diffusion cloud chamber.

摘要

在本文中，我们讨论了钠蒸汽的凝结以及钠气溶胶的形成，这一过程发生在气体蒸发冷凝室中。我们采用了一个描述蒸汽传输至蒸汽/气溶胶界面的一维模型来确定起始过饱和度，在此模型中，我们假设观察到的界面位置与最大成核速率一致。然后，我们在基于液滴模型的成核理论背景下，展示并讨论了所得的成核起始过饱和度数据。成核结果似乎与在热扩散云室中进行的铯蒸汽到液体的成核研究一致。