Spectroscopic diagnostics for evaluation of the analytical potential of argon + helium microwave-induced plasma with solution nebulization

Jankowski, Krzysztof; Jackowska, Adrianna

doi:10.1039/b705288j

Cited by 26 publications

(17 citation statements)

References 37 publications

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“…Our previous work indicated [16] that for plasma loaded by a low solvent amount (more dried plasma), the electron number density was reduced. Similar effects were observed for Ar, He, and Ar + He microwave plasma-the electron number density was evidently higher for wet plasma (solution nebulization) [45]. It may be concluded that the increase in is mainly related to a much better thermal conductivity of the dry plasma with hydrogen than the plasma loaded with water.…”

Section: Electron Densitysupporting

confidence: 65%

Electron Density from Balmer Series Hydrogen Lines and Ionization Temperatures in Inductively Coupled Argon Plasma Supplied by Aerosol and Volatile Species

Borkowska‐Burnecka

Żyrnicki

Wełna

et al. 2016

International Journal of Spectroscopy

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Electron density and ionization temperatures were measured for inductively coupled argon plasma at atmospheric pressure. Different sample introduction systems were investigated. Samples containing Sn, Hg, Mg, and Fe and acidified with hydrochloric or acetic acids were introduced into plasma in the form of aerosol, gaseous mixture produced in the reaction of these solutions with NaBH4 and the mixture of the aerosol and chemically generated gases. The electron densities measured from Hα, Hβ, Hγ, and Hδ lines on the base of Stark broadening were compared. The study of the H Balmer series line profiles showed that the ne values from Hγ and Hδ were well consistent with those obtained from Hβ which was considered as a common standard line for spectroscopic measurement of electron density. The ne values varied from 0.56·1015 to 1.32·1015 cm−3 and were the highest at loading mixture of chemically generated gases. The ionization temperatures of plasma, determined on the base of the Saha approach from ion-to-atom line intensity ratios, were lower for Sn and Hg (6500–7200 K) than those from Fe and Mg lines (7000–7800 K). The Sn II/Sn I and Hg II/Hg I, Fe II/Fe I, and Mg II/Mg I intensity ratios and the electron densities (ne) were dependent on experimental conditions of plasma generation. Experimental and theoretically calculated ionization degrees were compared.

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Section: Electron Densitysupporting

confidence: 65%

Electron Density from Balmer Series Hydrogen Lines and Ionization Temperatures in Inductively Coupled Argon Plasma Supplied by Aerosol and Volatile Species

Borkowska‐Burnecka

Żyrnicki

Wełna

et al. 2016

International Journal of Spectroscopy

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“…In our earlier communication, 12 we reported the generation of a filament-type helium MIP at atmospheric pressure by using a TE 101 integrated microwave resonator. We observed that the robustness of helium MIP was lower than argon MIP, namely, Fig.…”

Section: Tolerance For Water Loadingmentioning

confidence: 99%

A low-flow low-power helium microwave induced plasma for optical and mass spectrometry with solution nebulization

Jankowski

Jackowska

Ramsza

et al. 2008

J. Anal. At. Spectrom.

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“…The amplitudes A n are still unknown, but applying equation (8) to be the least squares fitted to the measured data I(y) at each measurement position y k , one obtains:…”

Section: T Exc (A)mentioning

confidence: 99%

“…As a consequence, the diagnostics based on the thermal emission of solid or liquid particles, for example by the DPV-2000, are not applicable. Optical emission spectroscopy (OES) however can be used to determine the properties of the plasma jet [4][5][6][7][8] and was also introduced to characterize the injected material in thermal spray processes such as the VPS/LPPS [9].…”

Section: Introductionmentioning

confidence: 99%

Excitation Temperature and Constituent Concentration Profiles of the Plasma Jet Under Plasma Spray-PVD Conditions

Mauer

Vaßen

2017

Plasma Chem Plasma Process

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Plasma spray-physical vapor deposition (PS-PVD) is a promising technology to produce columnar structured thermal barrier coatings with excellent cyclic lifetime. The characteristics of plasma jets generated by standard plasma gases in the PS-PVD process, argon and helium, have been studied by optical emission spectroscopy. Abel inversion was introduced to reconstruct the spatial characteristics. In the central area of the plasma jet, the ionization of argon was found to be one of the reasons for low emission of atomic argon. Another reason could be the demixing so that helium prevails around the central axis of the plasma jet. The excitation temperature of argon was calculated by the Boltzmann plot method. Its values decreased from the center to the edge of the plasma jet. Applying the same method, a spurious high excitation temperature of helium was obtained, which could be caused by the strong deviation from local thermal equilibrium of helium. The addition of hydrogen into plasma gases leads to a lower excitation temperature, however a higher substrate temperature due to the high thermal conductivity induced by the dissociation of hydrogen. A loading effect is exerted by the feedstock powder on the plasma jet, which was found to reduce the average excitation temperature considerably by more than 700 K in the Ar/He jet.

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Spectroscopic diagnostics for evaluation of the analytical potential of argon + helium microwave-induced plasma with solution nebulization

Cited by 26 publications

References 37 publications

Electron Density from Balmer Series Hydrogen Lines and Ionization Temperatures in Inductively Coupled Argon Plasma Supplied by Aerosol and Volatile Species

Electron Density from Balmer Series Hydrogen Lines and Ionization Temperatures in Inductively Coupled Argon Plasma Supplied by Aerosol and Volatile Species

A low-flow low-power helium microwave induced plasma for optical and mass spectrometry with solution nebulization

Excitation Temperature and Constituent Concentration Profiles of the Plasma Jet Under Plasma Spray-PVD Conditions

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