Results 131 to 140 of about 2,720 (168)

Electrochemistry of chalcopyrite

Hydrometallurgy, 1996
Abstract The electrochemical response of a massive chalcopyrite electrode at two different temperatures, 25°C and 68°C, were compared. The electrolyte used in the experiments was an acidic medium (0.4 g ·1 −1 (NH 4 ) 2 SO 4 , 0.5 g ·1 −1 MgSO 4 · 7H 2 O, 0.2 g ·1 −1 K 2 HPO 4 at pH = 2) which is suitable for the growth of the microorganisms ...
Gomez, C, Figueroa, M, Munoz, J, Blazquez, ML, Ballester, A   +4 more
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Hybrid Chalcopyrite–Polymer Magnetoconducting Materials

ACS Applied Materials & Interfaces, 2016
The search for emerging materials combining magnetic and semiconducting properties has attracted widespread interest in contemporary materials science. Chalcopyrite (CuFeS2), as an earth abundant and nontoxic chalcogenide compound in the I-III-VI2 family, is a promising class of such materials that exhibit unusual electrical, optical, and magnetic ...
Zhuolei, Zhang, Beibei, Xu, Lin, Zhang, Shenqiang, Ren   +3 more
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Chalcopyrite Structure Semiconductors

1988
The chalcopyrite structure semiconductors composed of elements from columns II, IV, and V of the periodic table represent a natural extension of the III–V zinc-blende compounds. These ternary compounds have very interesting linear and nonlinear optical properties.
Marvin L. Cohen, James R. Chelikowsky
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Phonons in chalcopyrite compounds

AIP Conference Proceedings, 1999
The phonon dispersion curves along the [100] and [001] directions of CuInSe2 and AgGaSe2 have been measured by inelastic neutron scattering. They are analyzed with different rigid-ion models: Born-von Karman and valence force field models. The calculated dispersion curves are in good agreement with experiments.The phonon dispersion curves along the ...
P. Derollez, A. Laamyem, R. Fouret, B. Hennion, J. Gonzalez   +4 more
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Electrical properties of chalcopyrite

British Journal of Applied Physics, 1958
The conductivity σ and thermoelectric power of synthetic and natural specimens of chalcopyrite have been investigated in the temperature range -140 to 300° C. The Hall coefficient R of the natural specimens has also been measured in this region, but in the case of the synthetic specimens is too small to be detected.
B Donovan, G Reichenbaum
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Novel Mn-doped chalcopyrites

Journal of Physics and Chemistry of Solids, 2003
Abstract Heavily Mn-doped II–VI–V 2 semiconductors, such as CdGeP 2 and ZnGeP 2 have been prepared by depositing Mn on single crystalline substrate at nearly 400 °C in an ultra high vacuum chamber. Well-defined ferromagnetic hysteresis with a saturation behavior appears in the magnetization curve up to above room temperature.
Sato, K, Medvedkin, GA, Ishibashi, T, Mitani, S, Takanashi, K, Ishida, Y, Sarma, DD, Okabayashi, J, Fujimori, A, Kamatani, T, Akai, H   +10 more
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Mössbauer Studies of Chalcopyrite

Journal of the Physical Society of Japan, 1968
Mossbauer spectra of naturally occurring mineral chalcopyrite have been studied over a temperature range 300°–448°K. The spectra showed a typical pattern of six absorption lines due to the internal magnetic field. The Q.S. have values which are independent of temperature whereas the magnitudes of the internal magnetic field are 325{±}10, 312{±}10 and ...
Deo Raj, K. Chandra, S. P. Puri
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Electronic properties of chalcopyrites

Journal of Physics and Chemistry of Solids, 1981
Abstract Using Phillips and Van Vechten theory [1–3], the values of the homopolar gap, ionic gap and Penn gap have been evaluated for thirty-one chalcopyrites. The values so derived have been found in accordance with the values obtained from the Penn model and the Phillips model. Using the above parameters the microhardness has been determined.
V.P. Gupta, V.K. Srivastava, P.N.L. Gupta   +2 more
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Wide-Gap Chalcopyrites

2006
Cu-Chalcopyrites-Unique Materials for Thin-Film Solar Cells.- Band-Structure Lineup at I-III-VI2 Schottky Contacts and Heterostructures.- Defects and Self-Compensation in Semiconductors.- Confine Cu to Increase Cu-Chalcopyrite Solar Cell Voltage.- Photocapacitance Spectroscopy in Copper Indium Diselenide Alloys.- Recombination Mechanisms in Cu(In,Ga ...
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Chalcopyrite dissolution rate laws

Applied Geochemistry, 2010
Abstract Meta-analysis of 173 rate measurements from 21 publications was used to develop rate laws for chalcopyrite dissolution under environmentally relevant conditions. Multiple linear regression analysis of 28 data for nonoxidative chalcopyrite dissolution in the presence of O2 and Cl− produced the following rate law: r = 10 - 1.52
Bryn E. Kimball, J. Donald Rimstidt, Susan L. Brantley   +2 more
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