Thermodynamics of the Cu–Bi system determined by vapour pressure measurements

Zajączkowski, Andrzej; Czernecki, J.; Suruło, Anna

doi:10.1016/j.calphad.2015.12.001

Cited by 9 publications

(16 citation statements)

References 16 publications

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“…6(a). The values of µ Bi corresponding to an equilibrium of the foregoing doping configurations with a reservoir consisting of (i) the Bi monomer gas, (ii) the Bi 2 dimer gas [44], (iii) the adsorbed Bi atoms, or (iv) the Bi solid are marked in Fig. 6(b).…”

Section: (C) and 1(d)mentioning

confidence: 99%

Doping-induced spin-orbit splitting in Bi-doped ZnO nanowires

2017

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Published version available at https: // doi. org/ 10. 1103/ PhysRevB. 95. 155404Our predictions, based on density-functional calculations, reveal that surface doping of ZnO nanowires with Bi leads to a linear-in-k splitting of the conduction-band states, through spin-orbit interaction, due to the lowering of the symmetry in the presence of the dopant. This finding implies that spin-polarization of the conduction electrons in Bi-doped ZnO nanowires could be controlled with applied electric (as opposed to magnetic) fields, making them candidate materials for spinorbitronic applications. Our findings also show that the degree of spin splitting could be tuned by adjusting the dopant concentration. Defect calculations and ab initio molecular dynamics simulations indicate that stable doping configurations exhibiting the foregoing linear-in-k splitting could be realized under reasonable thermodynamic conditions.

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Section: (C) and 1(d)mentioning

confidence: 99%

Doping-induced spin-orbit splitting in Bi-doped ZnO nanowires

2017

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“…Density and surface tension measurements were carried out under Ar-15 pct H 2 protective atmosphere. Before entering the measurement chamber the gas was first dehydrated by passing through a P 2 O 5 bed; subsequently, traces of O 2 were removed by passing through Ti shavings heated to 1173 K. The MBP method surface tension measurements take time; to suppress the risk of change in alloy composition with time due to Bi vapor pressure, [5] measurements were started from lower temperature, and each charge of alloy was used for 2-3 consecutive temperature steps. For instance, in the case of equimolar Bi-Cu alloy, four separate charges were used for measurement.…”

Section: Methodsmentioning

confidence: 99%

“…The demixing tendency in the liquid is expressed by thermodynamic properties such as exothermic enthalpy of mixing. [4] The above and the fact that the vapor pressure of Bi is much higher (3 orders of magnitude at T M of Cu) than the vapor pressure of Cu [5] makes experimental determination of the thermophysical properties, such as density, surface tension and viscosity, of the Bi-Cu liquid solutions particularly challenging. Recently, Bi-Cu alloys with high Bi content gained interest as potential material for thermal energy storage, [6] while alloys with low Bi content as liquid catalyst for methane pyrolysis.…”

Section: Introductionmentioning

confidence: 99%

Molar Volume and Surface Tension of Liquid Bi–Cu Alloys

Pstruś

Fima

2022

Metall Mater Trans A

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Bi–Cu alloys may potentially be used for thermal energy storage or as a catalyst for methane pyrolysis. For application research and simulations, it is necessary to know the reliable thermophysical properties of liquid alloys. Density of liquid Bi–Cu alloys (25, 50, 75 at. pct Cu) was measured with dilatometric method over the 971 K to 1500 K range. Density decreases linearly with temperature for all compositions. The molar volume calculated from measured densities shows positive excess molar volume. Surface tension was measured with maximum bubble pressure method over the 1125 K to 1500 K range. The data fitted with linear equations show that while the surface tension of 25 at. pct Cu decreases and that of 50 at. pct Cu alloy does not vary with temperature, the surface tension of 75 at. pct Cu alloy increases with temperature. The present results are confronted with literature data and several model calculations, part of which were performed in Pandat, and the reasons for positive excess molar volume and surface tension temperature coefficient are explained in terms of thermodynamics of Bi–Cu solutions.

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“…In the majority of used -up to know -methods of pyrometallurgical copper recovery from the postprocess slag, including the ones applied in Huta Głogów KGHM, coal in a form of coke or coal briquettes [13][14][15] together with fluxes. From the authors and others [7,[16][17][18][19] experience as well as from theoretical analyses it results, that such form of the carbon reagent is -in relation to reactions occurring within the slag phase -very low efficient.…”

Section: Methods Of the Removing Copper From The Slagmentioning

confidence: 99%

Assessment of the Harmfulness of the Slags from Copper Smelting Processes, in an Aspect of their Management

Holtzer

Bydałek

Wołczyński

et al. 2017

Archives of Foundry Engineering

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There are two methods to produce primary copper: hydrometallurgical and pyrometallurgical. Copper concentrates, from which copper matte is melted, constitute the charge at melting primary copper in the pyrometallurgical process. This process consists of a few stages, of which the basic ones are roasting and smelting. Smelting process may be bath and flash. Slag from copper production, on the end of process contain less 0,8%. It is treat as a waste or used other field, but only in a few friction. The slag amount for waste management or storage equaled 11 741 -16 011 million tons in 2011. This is a serious ecological problem. The following slags were investigated: slag originated from the primary copper production process in the flash furnace of the Outtokumpuja Company in HM Głogów 2 (Sample S2): the same slag after the copper removal performed according the up to now technology (Sample S1): slag originated from the primary copper production process in the flash furnace of the Outtokumpuja Company in HM Głogów 2, after the copper removal performed according the new technology (Sample S3). In practice, all tested slags satisfy the allowance criteria of storing on the dumping grounds of wastes other than hazardous and neutral.

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Thermodynamics of the Cu–Bi system determined by vapour pressure measurements

Cited by 9 publications

References 16 publications

Doping-induced spin-orbit splitting in Bi-doped ZnO nanowires

Doping-induced spin-orbit splitting in Bi-doped ZnO nanowires

Molar Volume and Surface Tension of Liquid Bi–Cu Alloys

Assessment of the Harmfulness of the Slags from Copper Smelting Processes, in an Aspect of their Management

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