Electrical arcs and, more generally thermal plasmas, are widely used in many applications and the understanding or improvement of corresponding processes systems, often requires precise modelling plasma. We present, here, a double approach to plasma modelling, which combines scientific procedure with an engineering point view. First, we present fundamental properties plasmas that required models, followed by basic equations structures models. The third part is devoted test cases, its...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTDesign of .mu.-oxalato copper(II) binuclear complexes exhibiting expected magnetic propertiesMiguel Julve, Michel Verdaguer, Alain Gleizes, Michele Philoche-Levisalles, and Olivier KahnCite this: Inorg. Chem. 1984, 23, 3808–3818Publication Date (Print):November 1, 1984Publication History Published online1 May 2002Published inissue 1 November 1984https://pubs.acs.org/doi/10.1021/ic00191a028https://doi.org/10.1021/ic00191a028research-articleACS...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCrystal structures, magnetic anisotropy properties and orbital interactions in catena-(.mu.-nitrito)-bis(ethylenediamine)nickel(II) perchlorate triiodideAnne Meyer, Alain Gleizes, Jean Jacques Girerd, Michel Verdaguer, Olivier KahnCite this: Inorg. Chem. 1982, 21, 5, 1729–1739Publication Date (Print):May 1, 1982Publication History Published online1 May 2002Published inissue 1...

A two-dimensional numerical model of the interaction between an electric arc and a solid anode different types is presented in this study. The CFD commercial code FLUENT used to plasma flow domain. Quantities such as velocities or temperature are presented, energy transfer components quantified. Comparisons calculated results with available experimental data literature show that predictions good agreement. In case argon gas copper anode, distance two electrodes 10 mm, maximum near cathode...

We have calculated the net emission coefficient of air plasmas at atmospheric pressure in temperature range between 300 and 40 000 K, assumption local thermodynamic equilibrium isothermal plasmas. This calculation takes into account radiation due to atomic continuum, molecular bands (several systems for O2, N2, NO N2+) lines. Special attention has been devoted this paper description radiation. The results show that high where molecules are dissociated, properties mainly those nitrogen...

The first pentanuclear complexes of formula {Dy[Cu(apox)](2)[Cu(apox)(H(2)O)](2)}[ClO(4)](3).7H(2)O (1), {Ho[Cu(apox)][Cu(apox)(H(2)O)](3)}[PF(6)](3).4.5H(2)O (2), {Gd[Cu(apox)](2)[Cu(apox)(H(2)O)](2)}[ClO(4)](3).7H(2)O (3) and {Gd[Cu(apox)][Cu(apox) (H(2)O)](3)}[PF(6)](3).4.5H(2)O (4) (H(2)apox = N,N'-bis(3-aminopropyl)oxamide) have been synthesized. crystal structures 1 2 determined by X-ray diffraction methods. Complexes 3 4 are isostructural with 2, respectively. Crystallographic data as...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCoordination modes of the squarate ligand: syntheses and crystal structures six copper(II) complexesXavier Solans, Magdalena Aguilo, Alain Gleizes, Juan Faus, Miguel Julve, Michel VerdaguerCite this: Inorg. Chem. 1990, 29, 4, 775–784Publication Date (Print):February 1, 1990Publication History Published online1 May 2002Published inissue 1 February 1990https://pubs.acs.org/doi/10.1021/ic00329a041https://doi.org/10.1021/ic00329a041research-articleACS...

This paper is devoted to the study of electric arc behaviour under influence an external magnetic field. situation close that occurring in a low-voltage circuit breaker where arc, after ignition, submitted field circuit. After discussion literature, we present our contribution. Two different methods are compared take effects into account. Arc displacement geometry studied dealt within specific development presented this paper. We show nature gas on velocity and possible re-strike using air...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructurally ordered bimetallic one-dimensional catena-.mu.-dithiooxalato compounds: synthesis, crystal and molecular structures, magnetic properties of AMn(S2C2O2)2(H2O)3.4.5H2O (A = copper, nickel, palladium, or platinum)Alain Gleizes Michel VerdaguerCite this: J. Am. Chem. Soc. 1984, 106, 13, 3727–3737Publication Date (Print):June 1, 1984Publication History Published online1 May 2002Published inissue 1 June...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTCopper(II), a chemical Janus: two different (oxalato)(bipyridyl)copper(II) complexes in one single crystal. Structure and magnetic propertiesMiguel Julve, Juan Faus, Michel Verdaguer, Alain GleizesCite this: J. Am. Chem. Soc. 1984, 106, 26, 8306–8308Publication Date (Print):December 1, 1984Publication History Published online1 May 2002Published inissue 1 December...

The quasi-one-dimensional compound CuMn${({\mathrm{S}}_{2}{\mathrm{C}}_{2}{\mathrm{O}}_{2})}_{2}$\ifmmode\cdot\else\textperiodcentered\fi{}7.5${\mathrm{H}}_{2}$O was synthesized, and its magnetic susceptibility ${\ensuremath{\chi}}_{M}$ measured in the temperature range $T=4.2\ensuremath{-}240$ K. curve ${\ensuremath{\chi}}_{M}T$ vs $T$ presents a minimum at 130 K maximum $\ensuremath{\simeq}7.5$ where three-dimensional ordering occurs. Magnetization data 1.3 4.2 field 0-5 T are consistent...

The thermodynamic properties and the transport coefficients of thermal plasmas formed in SF6-copper vapour mixtures were calculated as a function temperature pressure for molar concentrations copper between 0 10%. material property that is most affected by presence electrical conductivity temperatures up to 10000 K. results given this paper enabled data bank be built modelling arcs SF6 seeded with vapour.

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTRational synthesis of unidimensional mixed valence solids. Structural, spectral, and electrical studies charge distribution transport in partially oxidized nickel palladium bisdiphenylglyoximatesMartin Cowie, Alain Gleizes, Gregory W. Grynkewich, Davida Webster Kalina, Malcolm S. McClure, Raymond P. Scaringe, Robert C. Teitelbaum, Stanley L. Ruby, James A. Ibers, Cite this: J. Am. Chem. Soc. 1979, 101, 11, 2921–2936Publication Date (Print):May 1,...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTOrdered magnetic bimetallic chains: a novel class of one-dimensional compoundsAlain Gleizes and Michel VerdaguerCite this: J. Am. Chem. Soc. 1981, 103, 24, 7373–7374Publication Date (Print):December 1, 1981Publication History Published online1 May 2002Published inissue 1 December 1981https://pubs.acs.org/doi/10.1021/ja00414a074https://doi.org/10.1021/ja00414a074research-articleACS PublicationsRequest reuse permissionsArticle...

ADVERTISEMENT RETURN TO ISSUEPREVArticleTunable exchange interaction in .mu.-oxalato copper(II) dinuclear complexesMiguel Julve, Michel Verdaguer, Olivier Kahn, Alain Gleizes, and Michele Philoche-LevisallesCite this: Inorg. Chem. 1983, 22, 2, 368–370Publication Date (Print):January 1, 1983Publication History Published online1 May 2002Published inissue 1 January 1983https://pubs.acs.org/doi/10.1021/ic00144a039https://doi.org/10.1021/ic00144a039research-articleACS PublicationsRequest reuse...

Abstract This paper is devoted to the calculation of equilibrium compositions, thermodynamic properties (mass density, enthalpy and specific heat at constant pressure) transport coefficients (viscosity, electrical conductivity thermal conductivity) air/CO 2 /N –CF 3 I mixtures. These data are computed in temperature range 300 K–50 kK pressure between 1 32 bar. Results obtained for pure gases (CF I, CO , air N ) systematically compared with SF 6 . Transport CF mixtures or also confronted...

This paper deals with properties of air thermal plasmas containing vapours iron, silver or copper. The plasma is supposed to be in local thermodynamic equilibrium, for temperatures ranging from 2000 30 000 K. First, the equilibrium composition and are presented. Then, radiative calculated using method net emission coefficient. Finally, viscosity, electrical conductivities Chapman–Enskog. For all mixtures, mole fractions have been used. results computed various values pressure, size...

The only easy way to prepare amorphous alumina is via thin film deposition. For this reason, the disorder in has not yet been fully investigated. We have used very high-field (20 T) solid state 27Al NMR spectroscopy analyze structural modifications of films with deposition temperature (Td). were deposited by metalorganic chemical vapor Td range 360–720 °C. Depending on Td, composition either AlO1+x(OH)1–2x (0 ≤ x 0.5) or Al2O3. From 1D magic angle spinning (MAS) and 2D multiple-quantum...

The single-source approach to processing materials as thin films by metal–organic chemical vapor deposition (MOCVD) started with pioneering works in the late 1970s and early 1980s, has developed considerably during 1980s 1990s. literature contains some review feature articles dedicated its application various types of materials, most recent ones appearing mid present aims at putting together results obtained for very different so obtain a comparative view approaches. Faced considerable...

The net emission coefficient of Ar-Cu, N2-Cu, SF6-Cu and Ar-Fe mixtures was calculated for homogeneous isothermal plasmas at atmospheric pressure in the temperature range between 3000 25000 K. increase power radiated due to presence metal vapours depends on vapour itself (the is higher with iron than copper) type gas. influence mixture. In last part paper values were used calculate profile stationary arc Ar-Cu N2-Cu mixtures. copper radiation preponderant field currents whereas effect...

The net emission coefficient of SF6-N2 mixtures was calculated for temperatures between 8000 and 24000 K pressures 1 8 bar. calculation the radiative transfer lines required a study line broadening performed assuming that overlapping had negligible influence. results show resonance lines, although they are strongly absorbed, make up large part radiation-about as much continuum. Also, nitrogen more absorbed than sulphur or fluorine. At low radiation SF6 is stronger nitrogen. When T>12000...

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructure and magnetic spectroscopic properties of a nickelIIcopperIInickelII trinuclear speciesJuan Ribas, Carmen Diaz, Ramon Costa, Yves Journaux, Corine Mathoniere, Olivier Kahn, Alain GleizesCite this: Inorg. Chem. 1990, 29, 11, 2042–2047Publication Date (Print):May 1, 1990Publication History Published online1 May 2002Published inissue 1 1990https://pubs.acs.org/doi/10.1021/ic00336a003https://doi.org/10.1021/ic00336a003research-articleACS...

Abstract We present the calculation and main results of properties air–aluminum thermal plasmas, useful for complete modelling arc systems involving aluminum contacts. The are calculated assuming equilibrium correspond to composition, thermodynamic functions, transport coefficients including diffusion net emission coefficient representing divergence radiative flux in hottest plasma regions. is developed temperature range between 2000 30 000 K, a pressure from 0.1 1 bar several metal mass...

This article is devoted to the calculation of thermodynamic properties (mass density, enthalpy and specific heat at constant pressure) transport coefficients (viscosity, electrical conductivity, thermal conductivity combined diffusion coefficients) mixtures argon aluminum, iron copper vapour atmospheric pressure. Data are presented for temperature range 300 30 000 K, different concentrations metal vapours. The dependence on type concentration discussed. Mixtures occur in arc welding other...

This article is devoted to the calculation of net emission coefficient (NEC) Ar–Al, Ar–Fe and Ar–Cu mixtures at atmospheric pressure for arc welding processes. The results are given in data tables temperatures between 3 kK 30 kK, five plasma thicknesses (0, 0.5, 1, 2, 5 mm) ten concentrations metallic vapours (pure gas, 0.01%, 0.1%, 1%, 5%, 10%, 25%, 50%, 75% pure metal mass proportions). good agreement with most works published on subject such mixtures. They highlight influence three...