TY  - JOUR
AU  - Nikolić, Nebojša D.
AU  - Avramović, Ljiljana
AU  - Ivanović, Evica
AU  - Maksimović, Vesna M.
AU  - Baščarević, Zvezdana
AU  - Ignjatović, Nenad
PY  - 2019
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/5048
AB  - Production of copper powders by the potentiostatic electrolysis under different hydrogen evolution conditions was investigated. Copper powders were characterized by the scanning electron microscope (SEM), X-ray diffraction (XRD), particle size distribution (PSD), and by the determination of the specific surface area (SSA) of the formed powders. Depending on quantity of hydrogen generated during electrolysis, the two types of particles were formed: dendrites and cauliflower-like particles. The dendrites were formed without, while cauliflower-like particles with the quantity of evolved hydrogen enough to achieve strong effect on hydrodynamic conditions in the near-electrode layer. Although macro structure of the particles was very different, they showed similar micro structure. Namely, both types of the particles consisted of small agglomerates of approximately spherical Cu grains at the micro level. The existence of the spherical morphology was just responsible for random orientation of Cu crystallites in both types of particles. The SSA of cauliflower-like particles was more than two times larger than that of the dendrites, while their size was considerably smaller than that of the dendritic particles. In this way, the useful benefit of Cu powder formation in the conditions of vigorous hydrogen evolution is shown.
PB  - Elsevier Science Bv, Amsterdam
T2  - Transactions of Nonferrous Metals Society of China
T1  - Comparative morphological and crystallographic analysis of copper powders obtained under different electrolysis conditions
EP  - 1284
IS  - 6
SP  - 1275
VL  - 29
DO  - 10.1016/S1003-6326(19)65034-X
ER  - 

@article{
author = "Nikolić, Nebojša D. and Avramović, Ljiljana and Ivanović, Evica and Maksimović, Vesna M. and Baščarević, Zvezdana and Ignjatović, Nenad",
year = "2019",
abstract = "Production of copper powders by the potentiostatic electrolysis under different hydrogen evolution conditions was investigated. Copper powders were characterized by the scanning electron microscope (SEM), X-ray diffraction (XRD), particle size distribution (PSD), and by the determination of the specific surface area (SSA) of the formed powders. Depending on quantity of hydrogen generated during electrolysis, the two types of particles were formed: dendrites and cauliflower-like particles. The dendrites were formed without, while cauliflower-like particles with the quantity of evolved hydrogen enough to achieve strong effect on hydrodynamic conditions in the near-electrode layer. Although macro structure of the particles was very different, they showed similar micro structure. Namely, both types of the particles consisted of small agglomerates of approximately spherical Cu grains at the micro level. The existence of the spherical morphology was just responsible for random orientation of Cu crystallites in both types of particles. The SSA of cauliflower-like particles was more than two times larger than that of the dendrites, while their size was considerably smaller than that of the dendritic particles. In this way, the useful benefit of Cu powder formation in the conditions of vigorous hydrogen evolution is shown.",
publisher = "Elsevier Science Bv, Amsterdam",
journal = "Transactions of Nonferrous Metals Society of China",
title = "Comparative morphological and crystallographic analysis of copper powders obtained under different electrolysis conditions",
pages = "1284-1275",
number = "6",
volume = "29",
doi = "10.1016/S1003-6326(19)65034-X"
}

Nikolić, N. D., Avramović, L., Ivanović, E., Maksimović, V. M., Baščarević, Z.,& Ignjatović, N.. (2019). Comparative morphological and crystallographic analysis of copper powders obtained under different electrolysis conditions. in Transactions of Nonferrous Metals Society of China
Elsevier Science Bv, Amsterdam., 29(6), 1275-1284.
https://doi.org/10.1016/S1003-6326(19)65034-X

Nikolić ND, Avramović L, Ivanović E, Maksimović VM, Baščarević Z, Ignjatović N. Comparative morphological and crystallographic analysis of copper powders obtained under different electrolysis conditions. in Transactions of Nonferrous Metals Society of China. 2019;29(6):1275-1284.
doi:10.1016/S1003-6326(19)65034-X .

Nikolić, Nebojša D., Avramović, Ljiljana, Ivanović, Evica, Maksimović, Vesna M., Baščarević, Zvezdana, Ignjatović, Nenad, "Comparative morphological and crystallographic analysis of copper powders obtained under different electrolysis conditions" in Transactions of Nonferrous Metals Society of China, 29, no. 6 (2019):1275-1284,
https://doi.org/10.1016/S1003-6326(19)65034-X . .

TY  - JOUR
AU  - Rajković, Miloš
AU  - Lačnjevac, Uroš Č.
AU  - Baščarević, Zvezdana
AU  - Rajković, Teodora M.
AU  - Tošković, Dragan V.
AU  - Stanojević, Dušan D.
PY  - 2008
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/1679
AB  - Sample of scale which taken from house boiler is examined. This scale is made by warming drinking water from water-supply system of the -city of Belgrade - New Belgrade. Examinations on atomic absorption spectrophotometer (AAS) showed that there was mostly calcium, like CaO, for 48.90 % of mass which means calculated on contents CaCO3 takes 87.32 % of mass. Research on diffraction meter showed that scale is composed of CaCO3 (in % of mass) (85.25%), MgCO3 (11.05%), FeCO3 (1.90%) and MnCO3 (1.80%). It was also proved that scale is mixture of 66.92 % Mg calcite and 33.07 % aragonite. This structure is result of fact that Mg calcite and aragonite are become in quiet conditions of sedimentation of half shut skin-deep water surrounding on temperature between 60 and 100°C (nearest about 80°C) and low pressure.
AB  - Ispitivan je uzorak kamenca koji je uzet sa kućnog bojlera nastao zagrevanjem vode za piće koja se nalazi u vodovodnoj mreži grada Beograda - Novi Beograd (blokovi). Ispitivanja na atomskom apsorpcionom spektrofotometru ukazala su da se nalazi dominantno kalcijum, kao CaO i to 48,90%, što preračunato na sadržaj CaCO3 iznosi 87,32%. Snimanja na difraktometru ukazala su da se kamenac sastoji od CaCO3 (85,25%), MgCO3 (11,05%), FeCO3 (1,90%) i MnCO3 (1,80%). Takođe je dokazano da je kamenac mešavina koja se sastoji od 66,92 % kalcita i 33,07% aragonita. Ovakav sastav posledica je činjenice da su kalcit i aragonit nastali u mirnijim uslovima sedimentacije u poluzatvorenoj plitkovodnoj sredini na temperaturi između 60 i 100°C (najbliže oko 80°C) i pri niskom pritisku.
PB  - Inženjersko društvo za koroziju, Beograd
T2  - Zaštita materijala
T1  - Determination of crystalline structure of calcium carbonate obtained from drinking water
T1  - Određivanje kristalne strukture kalcijum-karbonata dobijenog iz vode za piće
EP  - 50
IS  - 2
SP  - 43
VL  - 49
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_1679
ER  - 

@article{
author = "Rajković, Miloš and Lačnjevac, Uroš Č. and Baščarević, Zvezdana and Rajković, Teodora M. and Tošković, Dragan V. and Stanojević, Dušan D.",
year = "2008",
abstract = "Sample of scale which taken from house boiler is examined. This scale is made by warming drinking water from water-supply system of the -city of Belgrade - New Belgrade. Examinations on atomic absorption spectrophotometer (AAS) showed that there was mostly calcium, like CaO, for 48.90 % of mass which means calculated on contents CaCO3 takes 87.32 % of mass. Research on diffraction meter showed that scale is composed of CaCO3 (in % of mass) (85.25%), MgCO3 (11.05%), FeCO3 (1.90%) and MnCO3 (1.80%). It was also proved that scale is mixture of 66.92 % Mg calcite and 33.07 % aragonite. This structure is result of fact that Mg calcite and aragonite are become in quiet conditions of sedimentation of half shut skin-deep water surrounding on temperature between 60 and 100°C (nearest about 80°C) and low pressure., Ispitivan je uzorak kamenca koji je uzet sa kućnog bojlera nastao zagrevanjem vode za piće koja se nalazi u vodovodnoj mreži grada Beograda - Novi Beograd (blokovi). Ispitivanja na atomskom apsorpcionom spektrofotometru ukazala su da se nalazi dominantno kalcijum, kao CaO i to 48,90%, što preračunato na sadržaj CaCO3 iznosi 87,32%. Snimanja na difraktometru ukazala su da se kamenac sastoji od CaCO3 (85,25%), MgCO3 (11,05%), FeCO3 (1,90%) i MnCO3 (1,80%). Takođe je dokazano da je kamenac mešavina koja se sastoji od 66,92 % kalcita i 33,07% aragonita. Ovakav sastav posledica je činjenice da su kalcit i aragonit nastali u mirnijim uslovima sedimentacije u poluzatvorenoj plitkovodnoj sredini na temperaturi između 60 i 100°C (najbliže oko 80°C) i pri niskom pritisku.",
publisher = "Inženjersko društvo za koroziju, Beograd",
journal = "Zaštita materijala",
title = "Determination of crystalline structure of calcium carbonate obtained from drinking water, Određivanje kristalne strukture kalcijum-karbonata dobijenog iz vode za piće",
pages = "50-43",
number = "2",
volume = "49",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_1679"
}

Rajković, M., Lačnjevac, U. Č., Baščarević, Z., Rajković, T. M., Tošković, D. V.,& Stanojević, D. D.. (2008). Determination of crystalline structure of calcium carbonate obtained from drinking water. in Zaštita materijala
Inženjersko društvo za koroziju, Beograd., 49(2), 43-50.
https://hdl.handle.net/21.15107/rcub_agrospace_1679

Rajković M, Lačnjevac UČ, Baščarević Z, Rajković TM, Tošković DV, Stanojević DD. Determination of crystalline structure of calcium carbonate obtained from drinking water. in Zaštita materijala. 2008;49(2):43-50.
https://hdl.handle.net/21.15107/rcub_agrospace_1679 .

Rajković, Miloš, Lačnjevac, Uroš Č., Baščarević, Zvezdana, Rajković, Teodora M., Tošković, Dragan V., Stanojević, Dušan D., "Determination of crystalline structure of calcium carbonate obtained from drinking water" in Zaštita materijala, 49, no. 2 (2008):43-50,
https://hdl.handle.net/21.15107/rcub_agrospace_1679 .