Thermodynamic Properties and Transport Coefficients of Nitrogen, Hydrogen and Helium Plasma Mixed with Silver Vapor

Abstract

Species composites of Ag-N2, Ag-H2 and Ag-He plasmas in the temperature range of 3,000-20,000 K and at 1 atmospheric pressure were calculated by using the minimization of Gibbs free energy. Thermodynamic properties and transport coefficients of nitrogen, hydrogen and helium plasmas mixed with a variety of silver vapor were then calculated based on the equilibrium composites and collision integral data. The calculation procedure was verified by comparing the results obtained in this paper with the published transport coefficients on the case of pure nitrogen plasma. The influences of the silver vapor concentration on composites, thermodynamic properties and transport coefficients were finally analyzed and summarized for all the three types of plasmas. Those physical properties were important for theoretical study and numerical calculation on arc plasma generated by silver-based electrodes in those gases in sealed electromagnetic relays and contacts.

Influence of He and N2 plasma on in situ surface passivated Fe nanopowders by plasma arc discharge

“…Further, He gas has higher quenching rate which restricts the growth of particles. So the crystallite size of the samples processed in He atmosphere are smaller when compared to samples processed in N 2 atmosphere [28,29].…”

“…The average crystallite size values and particle size values of the samples for different conditions are given in table 1. The particle sizes of samples processed in N 2 atmosphere are larger than that of He atmosphere, because He atmosphere provides faster quenching rate (due to higher thermal conductivity) than N 2 which restricts the growth of particles in the former case compared to the latter case [29,30]. Whereas, as far as morphology is concerned, samples in N 2 atmosphere show some interesting morphology than its He counterparts.…”

Mode transition and plasma characteristics of nanosecond pulse gas–liquid discharge: Effect of grounding configuration

“…The Van der Waals broadening is determined through the equation given in references [43,44] and simplified to Equation (6), which is suitable for our experiment situation. T g in Equation (6) is the gas temperature.…”

Morphological, electronic, and magnetic properties of multicomponent cobalt oxide nanoparticles synthesized by high temperature arc plasma

“…This mechanism leads to a reduced thermal stress in the He atmosphere. A higher quenching rate in He may also lead also to the reduced evaporation rate from the plasma plume [30]. Consequently, the evaporation rate and stress are both higher due to higher particle-particle interaction in air ambient [31].…”