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ORE at CSIR-Institute of Minerals and Materials Technology: Recent submissions

Now showing items 2751-2760 of 3793

Effect of preparation conditions on formation of nanophase Ni-Zn ferrites through hydrothermal technique

Upadhyay, C.; Mishra, D.; Verma, H.C.; Anand, S.; Das, R.P. (Journal Of Magnetism And Magnetic Materials, 260(1-2), 2003: 188-194)

Nanophase Ni1-xZnxFe2O4 (x = 0, 0.5, 1.0) samples were prepared by chemically precipitating hydroxides followed by hydrothermal processing. The products were characterized by X-ray diffraction and Mossbauer spectroscopy. ...
Bio-dissolution of zinc sulfide concentrate in 160 1 4-stage continuous bioreactor

Pani, C.K.; Swain, S.; Kar, R.N.; Chaudhury, G.R.; Sukla, L.B.; Misra, V.N. (Minerals Engineering, 16(10), 2003: 1019-1021)

This paper reports the bioleaching of zinc sulfide concentrates by mesophilic chemolithotrophic bacteria. The leaching studies were carried out in 160 14-stage bioreactor in optimized conditions based on 40 1 batch scale ...
Study on morphology of copper deposited onto aluminium by immersion plating from an oxalate bath containing perchloric acid

Kanungo, M.; Mishra, K.G.; Das, S.C. (Minerals Engineering, 16(12), 2003: 1383-1386)

The structural characteristics of copper deposits resulting from immersion plating of copper are presented. In this study halide is replaced by perchloric acid, which is found to effectively break down the impervious oxide ...
Studies on reaction mechanism of bioleaching of manganese ore

Acharya, C.; Kar, R.N.; Sukla, L.B. (Minerals Engineering, 16(10), 2003: 1027-1030)

A systematic study has been made to establish the reaction mechanism of bioleaching of manganese ore with the manganese reducing fungi, Penicillium citrinum, isolated from the top soil of an active manganese ore mine site. ...
Effect of addition of Cu(II), Ni(II) and Co(II) ions on conversion of crystalline goethite to magnetite in NH3-FeSO4-H2O medium

Mohapatra, M.; Anand, S.; Das, R.P.; Upadhyay, C.; Verma, H.C. (International Journal Of Mineral Processing, 69(1-4), 2003: 75-86)

Conversion of crystalline goethite to magnetite was carried out in the presence of Cu(II), Ni(II) or Co(II) ions in NH3-Fe(II)-H2O medium. The conditions used were: temperature 403 K, ammonia 25 g l(-1), time 2 h, ferrous ...
Synthesis of high-surface area Mn-doped barium hexa-aluminates by a combination of hydrothermal precipitation-calcination route

Mishra, D.; Anand, S.; Panda, R.K.; Das, R.P. (Materials Chemistry And Physics, 82(3), 2003: 892-896)

High-surface area (25 m(2) g(-1)) Mn-doped barium hexa-aluminates with compositions BaMnAl11O19 and BaMn2Al10O19 were prepared by a combination of hydrothermal precipitation-calcination route. The precursors of the above ...
Oxidative ammonia leaching of sphalerite - Part II: Cu(II)-catalyzed kinetics

Ghosh, M.K.; Das, R.P.; Biswas, A.K. (International Journal Of Mineral Processing, 70(1-4), 2003: 221-234)

Results of a kinetic study on sphalerite leaching in ammonia using Cu(II) as an oxidation catalyst are presented. The effect of oxygen partial pressure, temperature, particle size, pH, NH3 and Cu(II) concentration was ...
Electrochemical cleaning of soil contaminated with a dichromate lixiviant

Manna, M.; Sanjay, K.; Shekhar, R. (International Journal Of Mineral Processing, 72(1-4), 2003: 401-406)

Experiments are conducted on kaolin contaminated with a lixiviant obtained from a sodium dichromate plant residue to demonstrate the efficacy of electrochemical cleaning. After 120 h, only 36% chromium is removed from the ...
Effect of sintering process on the magnetotransport properties of Ho-doped La0.67Ca0.33MnO3

Sahu, D.R.; Pradhan, A.K.; Mishra, Pratima Kumari; Behera, D.; Datta, P.; Roul, B.K. (Materials Chemistry And Physics, 77(1), 2003: 165-169)

A series of highly dense Ho-doped La0.67Ca0.33MnO3 (LCMO) bulk ceramic samples were processed in the temperature range 1450 to 1600 degreesC and performed transport measurement (temperature down to 5 K and magnetic field ...
Effect of precipitating agents on the physicochemical and electrolytic characteristics of nickel hydroxide

Acharya, R.; Subbaiah, T.; Anand, S.; Das, R.P. (Materials Letters, 57(20), 2003: 3089-3095)

Nickel hydroxide samples were prepared from nickel sulphate solution using three different precipitating agents, namely urea, sodium hydroxide and ammonia under identical preparation conditions. Depending on the nature of ...

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