The low-temperature thermal oxidation of copper, Cu3O2, and its influence on past and future studies

Cocke, David L.; Schennach, Robert; Hossain, Mohammad A.; Mencer, Donald; McWhinney, Hylton; Parga, José R.; Kesmez, Mehmet; Gomes, Jewel A.; Mollah, M. Yousuf A.

doi:10.1016/j.vacuum.2005.01.010

Cited by 61 publications

(38 citation statements)

References 77 publications

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“…During the thermal oxidation process, Cu 2 O is first formed, and after a sufficiently long oxidation time, CuO is formed (Musa et al, 1998;Cocke et al, 2005;Korshunov, and Il'in, 2009). Thus, the reactions occurring during the thermal oxidation process can be written as follows:…”

Section: Introductionmentioning

confidence: 99%

Leaching of Malachite Ore in Ammonium Sulfate Solutions and Production of Copper Oxide

Ekmekyapar

Demirkıran

Künkül

et al. 2015

Braz. J. Chem. Eng.

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-Malachite ore is one of the most important of oxidized copper ores. Copper production can be performed by using this ore. In this work, the leaching kinetics of malachite in ammonium sulfate solutions was investigated, and metallic copper was recovered by a cementation method from the resulting actual leach solution. Copper (II) oxide was prepared by an isothermal oxidation method from the cement copper. In the leaching experiments, the effects of reaction temperature, particle size, and stirring speed on copper leaching from malachite ore were studied. In the cementation experiments, metallic zinc was used as the reductant metal to recover the copper from the solution. Thermal oxidation of cement copper was performed under isothermal conditions. It was found that the leaching rate increased with increasing stirring speed and temperature, and decreased with particle size. It was observed that the leaching reaction fit to diffusion through the product layer. The activation energy of the leaching process was determined to be 25.4 kJ/mol. It was determined that the copper content of the metallic product obtained by the cementation method increased up to 96%. It was found that copper oxide prepared from cement copper had a tenorite structure.

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Section: Introductionmentioning

confidence: 99%

Leaching of Malachite Ore in Ammonium Sulfate Solutions and Production of Copper Oxide

Ekmekyapar

Demirkıran

Künkül

et al. 2015

Braz. J. Chem. Eng.

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show abstract

“…[1 -3] [47,48] detecting the presence of this phase is rather difficult and is not covered in this study. The controversial identification of copper oxides and the miscalculation of oxide thickness in the past, even ASTM Standard B49-50, [31] handicapped academic research since the first paper was published in 1937 [36] and restrained industrial applications.…”

Section: Discussionmentioning

confidence: 99%

Qualitative and quantitative identification of copper oxides

Su¹,

Shemenski²

2008

Surface & Interface Analysis

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The quality, thickness, and chemistry of oxides on metal surfaces play a vital role in a variety of applications. Some of these include adhesion of elastomers to metal surfaces, solar cell efficiency, sealing of electronic packaging, reduction of friction during wet drawing, and degree of biocompatibility of biomaterials. However, contradictory results and misidentification of oxide layers on metallic surfaces have caused ambiguity in interpretation of results leading to incorrect use in industrial application. This study will focus on the effect of experimental parameters such as electrolyte composition and concentration, current density, coating, time constant, surface roughness, and concentration of depolarizer on cathodic reduction of oxides on metallic wires to yield precise measurement and correct identification of oxide layers.

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“…Interestingly, copper has been shown to have somewhat complex oxidation behavior at low temperatures, displaying at least 3 different oxides in the temperature range of room temperature to 330°C in an air atmosphere [96,97]. …”

Section: Optical and Scanning Electron Microscopymentioning

confidence: 99%

Generation and Characterization of Anisotropic Microstructures in Rare Earth-Iron-Boron Alloys

Oster

2012

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The low-temperature thermal oxidation of copper, Cu3O2, and its influence on past and future studies

Cited by 61 publications

References 77 publications

Leaching of Malachite Ore in Ammonium Sulfate Solutions and Production of Copper Oxide

Leaching of Malachite Ore in Ammonium Sulfate Solutions and Production of Copper Oxide

Qualitative and quantitative identification of copper oxides

Generation and Characterization of Anisotropic Microstructures in Rare Earth-Iron-Boron Alloys

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