Avramović, Ljiljana

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  • Avramović, Ljiljana (5)
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Author's Bibliography

Comparative morphological and crystallographic analysis of copper powders obtained under different electrolysis conditions

Nikolić, Nebojša D.; Avramović, Ljiljana; Ivanović, Evica R.; Maksimović, Vesna M.; Baščarević, Zvezdana; Ignjatović, Nenad

(Elsevier, 2019)

TY  - JOUR
AU  - Nikolić, Nebojša D.
AU  - Avramović, Ljiljana
AU  - Ivanović, Evica R.
AU  - Maksimović, Vesna M.
AU  - Baščarević, Zvezdana
AU  - Ignjatović, Nenad
PY  - 2019
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
T2  - Transactions of Nonferrous Metals Society of China
T1  - Comparative morphological and crystallographic analysis of copper powders obtained under different electrolysis conditions
SP  - 1275
EP  - 1284
VL  - 29
IS  - 6
DO  - 10.1016/S1003-6326(19)65034-X
UR  - https://hdl.handle.net/21.15107/rcub_dais_6371
ER  - 
@article{
author = "Nikolić, Nebojša D. and Avramović, Ljiljana and Ivanović, Evica R. 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",
journal = "Transactions of Nonferrous Metals Society of China",
title = "Comparative morphological and crystallographic analysis of copper powders obtained under different electrolysis conditions",
pages = "1275-1284",
volume = "29",
number = "6",
doi = "10.1016/S1003-6326(19)65034-X",
url = "https://hdl.handle.net/21.15107/rcub_dais_6371"
}
Nikolić, N. D., Avramović, L., Ivanović, E. R., Maksimović, V. M., Baščarević, Z.,& Ignjatović, N. (2019). Comparative morphological and crystallographic analysis of copper powders obtained under different electrolysis conditions.
Transactions of Nonferrous Metals Society of China
Elsevier., 29(6), 1275-1284.
https://doi.org/10.1016/S1003-6326(19)65034-X
Nikolić ND, Avramović L, Ivanović ER, Maksimović VM, Baščarević Z, Ignjatović N. Comparative morphological and crystallographic analysis of copper powders obtained under different electrolysis conditions. 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 R., Maksimović Vesna M., Baščarević Zvezdana, Ignjatović Nenad, "Comparative morphological and crystallographic analysis of copper powders obtained under different electrolysis conditions" Transactions of Nonferrous Metals Society of China, 29, no. 6 (2019):1275-1284,
https://doi.org/10.1016/S1003-6326(19)65034-X .
8
4
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Influence of the Shape of Copper Powder Particles on the Crystal Structure and Some Decisive Characteristics of the Metal Powders

Avramović, Ljiljana; Maksimović, Vesna M.; Baščarević, Zvezdana; Ignjatović, Nenad; Bugarin, Mile; Marković, Radmila; Nikolić, Nebojša D.

(Basel : MDPI, 2019)

TY  - JOUR
AU  - Avramović, Ljiljana
AU  - Maksimović, Vesna M.
AU  - Baščarević, Zvezdana
AU  - Ignjatović, Nenad
AU  - Bugarin, Mile
AU  - Marković, Radmila
AU  - Nikolić, Nebojša D.
PY  - 2019
AB  - Three different forms of Cu powder particles obtained by either galvanostatic electrolysis or a non-electrolytic method were analyzed by a scanning electron microscope (SEM), X-ray diffraction (XRD) and particle size distribution (PSD). Electrolytic procedures were performed under different hydrogen evolution conditions, leading to the formation of either 3D branched dendrites or disperse cauliflower-like particles. The third type of particles were compact agglomerates of the Cu grains, whose structural characteristics indicated that they were formed by a non-electrolytic method. Unlike the sharp tips that characterize the usual form of Cu dendrites, the ends of both the trunk and branches were globules in the formed dendrites, indicating that a novel type of Cu dendrites was formed in this investigation. Although the macro structures of the particles were extremely varied, they had very similar micro structures because they were constructed by spherical grains. The Cu crystallites were randomly oriented in the dendrites and compact agglomerates of the Cu grains, while the disperse cauliflower-like particles showed (220) and (311) preferred orientation. This indicates that the applied current density affects not only the morphology of the particles, but also their crystal structure. The best performance, defined by the largest specific surface area and the smallest particle size, was by the galvanostatically produced powder consisting of disperse cauliflower-like particles.
PB  - Basel : MDPI
T2  - Metals
T1  - Influence of the Shape of Copper Powder Particles on the Crystal Structure and Some Decisive Characteristics of the Metal Powders
SP  - 56
VL  - 9
IS  - 1
DO  - 10.3390/met9010056
UR  - https://hdl.handle.net/21.15107/rcub_dais_4770
ER  - 
@article{
author = "Avramović, Ljiljana and Maksimović, Vesna M. and Baščarević, Zvezdana and Ignjatović, Nenad and Bugarin, Mile and Marković, Radmila and Nikolić, Nebojša D.",
year = "2019",
abstract = "Three different forms of Cu powder particles obtained by either galvanostatic electrolysis or a non-electrolytic method were analyzed by a scanning electron microscope (SEM), X-ray diffraction (XRD) and particle size distribution (PSD). Electrolytic procedures were performed under different hydrogen evolution conditions, leading to the formation of either 3D branched dendrites or disperse cauliflower-like particles. The third type of particles were compact agglomerates of the Cu grains, whose structural characteristics indicated that they were formed by a non-electrolytic method. Unlike the sharp tips that characterize the usual form of Cu dendrites, the ends of both the trunk and branches were globules in the formed dendrites, indicating that a novel type of Cu dendrites was formed in this investigation. Although the macro structures of the particles were extremely varied, they had very similar micro structures because they were constructed by spherical grains. The Cu crystallites were randomly oriented in the dendrites and compact agglomerates of the Cu grains, while the disperse cauliflower-like particles showed (220) and (311) preferred orientation. This indicates that the applied current density affects not only the morphology of the particles, but also their crystal structure. The best performance, defined by the largest specific surface area and the smallest particle size, was by the galvanostatically produced powder consisting of disperse cauliflower-like particles.",
publisher = "Basel : MDPI",
journal = "Metals",
title = "Influence of the Shape of Copper Powder Particles on the Crystal Structure and Some Decisive Characteristics of the Metal Powders",
pages = "56",
volume = "9",
number = "1",
doi = "10.3390/met9010056",
url = "https://hdl.handle.net/21.15107/rcub_dais_4770"
}
Avramović, L., Maksimović, V. M., Baščarević, Z., Ignjatović, N., Bugarin, M., Marković, R.,& Nikolić, N. D. (2019). Influence of the Shape of Copper Powder Particles on the Crystal Structure and Some Decisive Characteristics of the Metal Powders.
Metals
Basel : MDPI., 9(1), 56.
https://doi.org/10.3390/met9010056
Avramović L, Maksimović VM, Baščarević Z, Ignjatović N, Bugarin M, Marković R, Nikolić ND. Influence of the Shape of Copper Powder Particles on the Crystal Structure and Some Decisive Characteristics of the Metal Powders. Metals. 2019;9(1):56.
doi:10.3390/met9010056.
Avramović Ljiljana, Maksimović Vesna M., Baščarević Zvezdana, Ignjatović Nenad, Bugarin Mile, Marković Radmila, Nikolić Nebojša D., "Influence of the Shape of Copper Powder Particles on the Crystal Structure and Some Decisive Characteristics of the Metal Powders" Metals, 9, no. 1 (2019):56,
https://doi.org/10.3390/met9010056 .
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Comparative morphological and crystallographic analysis of copper powders obtained under different electrolysis conditions

Nikolić, Nebojša D.; Avramović, Ljiljana; Ivanović, Evica R.; Maksimović, Vesna M.; Baščarević, Zvezdana; Ignjatović, Nenad

(Elsevier, 2019)

TY  - JOUR
AU  - Nikolić, Nebojša D.
AU  - Avramović, Ljiljana
AU  - Ivanović, Evica R.
AU  - Maksimović, Vesna M.
AU  - Baščarević, Zvezdana
AU  - Ignjatović, Nenad
PY  - 2019
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
T2  - Transactions of Nonferrous Metals Society of China
T1  - Comparative morphological and crystallographic analysis of copper powders obtained under different electrolysis conditions
SP  - 1275
EP  - 1284
VL  - 29
IS  - 6
DO  - 10.1016/S1003-6326(19)65034-X
UR  - https://hdl.handle.net/21.15107/rcub_dais_6370
ER  - 
@article{
author = "Nikolić, Nebojša D. and Avramović, Ljiljana and Ivanović, Evica R. 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",
journal = "Transactions of Nonferrous Metals Society of China",
title = "Comparative morphological and crystallographic analysis of copper powders obtained under different electrolysis conditions",
pages = "1275-1284",
volume = "29",
number = "6",
doi = "10.1016/S1003-6326(19)65034-X",
url = "https://hdl.handle.net/21.15107/rcub_dais_6370"
}
Nikolić, N. D., Avramović, L., Ivanović, E. R., Maksimović, V. M., Baščarević, Z.,& Ignjatović, N. (2019). Comparative morphological and crystallographic analysis of copper powders obtained under different electrolysis conditions.
Transactions of Nonferrous Metals Society of China
Elsevier., 29(6), 1275-1284.
https://doi.org/10.1016/S1003-6326(19)65034-X
Nikolić ND, Avramović L, Ivanović ER, Maksimović VM, Baščarević Z, Ignjatović N. Comparative morphological and crystallographic analysis of copper powders obtained under different electrolysis conditions. 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 R., Maksimović Vesna M., Baščarević Zvezdana, Ignjatović Nenad, "Comparative morphological and crystallographic analysis of copper powders obtained under different electrolysis conditions" Transactions of Nonferrous Metals Society of China, 29, no. 6 (2019):1275-1284,
https://doi.org/10.1016/S1003-6326(19)65034-X .
8
4
12

The effect of Ni content on passivation of copper anodes with non-standard chemical composition

Marković, Radmila; Stevanović, Jasmina S.; Jugović, Branimir; Gvozdenović, Milica M.; Avramović, Ljiljana

(Tatranské Matliare : Slovak Society of Chemical Engineering, 2012)

TY  - CONF
AU  - Marković, Radmila
AU  - Stevanović, Jasmina S.
AU  - Jugović, Branimir
AU  - Gvozdenović, Milica M.
AU  - Avramović, Ljiljana
PY  - 2012
AB  - In this paper are presented the results of the first appearance of full pasivation during the treatment of the waste sulphuric-acid solution generated in the conventional copper electrorefining process. The copper anodes with non-standard content of nickel, lead, tin and antimony were used as material for electrochemical refinement. Nickel content in anodes was approximately 5 or 7.5 wt. %, and the summary content of lead, tin and antimony was up to 3 wt. %. Copper content was a difference of up to 100 wt. %. Chemical analysis of the waste solution from copper refining process which was used as electrolyte has shown that the Ni and As ions are present in concentrations of Ni - 20.5 g dm-3 and As – 4 g dm-3. The experiments were carried out in galvanostatic mode at current density of 250 A m-2, at electrolyte temperatures of T1 = 63 ± 2 0C and T2 = 73 ± 2 0C for a process duration of 72 h. The data obtained on the basis of the measured values of cell voltage for each anode where the nickel content was approximately 5 wt. % (anodes marked as A1-A4) and nickel content of approximately 7.5 wt.% (anodes marked as A5-A8) shown that using the anodes with lower nickel content (A2 and A3) leads to the appearance of full pasivation phenomenon at both electrolyte temperature. The apperance of full passivation for anodes with higher nickel content (A5-A7) is registered only at lower electrolyte temperature.
PB  - Tatranské Matliare : Slovak Society of Chemical Engineering
C3  - Proceedings of the 39th International Conference of Slovak Society of Chemical Engineering
T1  - The effect of Ni content on passivation of copper anodes with non-standard chemical composition
SP  - 1462
EP  - 1466
UR  - https://hdl.handle.net/21.15107/rcub_dais_495
ER  - 
@conference{
author = "Marković, Radmila and Stevanović, Jasmina S. and Jugović, Branimir and Gvozdenović, Milica M. and Avramović, Ljiljana",
year = "2012",
abstract = "In this paper are presented the results of the first appearance of full pasivation during the treatment of the waste sulphuric-acid solution generated in the conventional copper electrorefining process. The copper anodes with non-standard content of nickel, lead, tin and antimony were used as material for electrochemical refinement. Nickel content in anodes was approximately 5 or 7.5 wt. %, and the summary content of lead, tin and antimony was up to 3 wt. %. Copper content was a difference of up to 100 wt. %. Chemical analysis of the waste solution from copper refining process which was used as electrolyte has shown that the Ni and As ions are present in concentrations of Ni - 20.5 g dm-3 and As – 4 g dm-3. The experiments were carried out in galvanostatic mode at current density of 250 A m-2, at electrolyte temperatures of T1 = 63 ± 2 0C and T2 = 73 ± 2 0C for a process duration of 72 h. The data obtained on the basis of the measured values of cell voltage for each anode where the nickel content was approximately 5 wt. % (anodes marked as A1-A4) and nickel content of approximately 7.5 wt.% (anodes marked as A5-A8) shown that using the anodes with lower nickel content (A2 and A3) leads to the appearance of full pasivation phenomenon at both electrolyte temperature. The apperance of full passivation for anodes with higher nickel content (A5-A7) is registered only at lower electrolyte temperature.",
publisher = "Tatranské Matliare : Slovak Society of Chemical Engineering",
journal = "Proceedings of the 39th International Conference of Slovak Society of Chemical Engineering",
title = "The effect of Ni content on passivation of copper anodes with non-standard chemical composition",
pages = "1462-1466",
url = "https://hdl.handle.net/21.15107/rcub_dais_495"
}
Marković, R., Stevanović, J. S., Jugović, B., Gvozdenović, M. M.,& Avramović, L. (2012). The effect of Ni content on passivation of copper anodes with non-standard chemical composition.
Proceedings of the 39th International Conference of Slovak Society of Chemical Engineering
Tatranské Matliare : Slovak Society of Chemical Engineering., 1462-1466.
Marković R, Stevanović JS, Jugović B, Gvozdenović MM, Avramović L. The effect of Ni content on passivation of copper anodes with non-standard chemical composition. Proceedings of the 39th International Conference of Slovak Society of Chemical Engineering. 2012;:1462-1466.
Marković Radmila, Stevanović Jasmina S., Jugović Branimir, Gvozdenović Milica M., Avramović Ljiljana, "The effect of Ni content on passivation of copper anodes with non-standard chemical composition" Proceedings of the 39th International Conference of Slovak Society of Chemical Engineering (2012):1462-1466

Copper-Sulfate Pentahydrate as a Product of the Waste Sulfuric Acid Solution Treatment

Marković, Radmila; Stevanović, Jasmina S.; Avramović, Ljiljana; Nedeljković, Dragutin; Jugović, Branimir; Stajić Trošić, Jasna; Gvozdenović, Milica M.

(Springer US, 2012)

TY  - JOUR
AU  - Marković, Radmila
AU  - Stevanović, Jasmina S.
AU  - Avramović, Ljiljana
AU  - Nedeljković, Dragutin
AU  - Jugović, Branimir
AU  - Stajić Trošić, Jasna
AU  - Gvozdenović, Milica M.
PY  - 2012
AB  - The aim of this study is synthesis of copper-sulfate pentahydrate from the waste sulfuric acid solution-mother liquor generated during the regeneration process of copper bleed solution. Copper is removed from the mother liquor solution in the process of the electrolytic treatment using the insoluble lead anodes alloyed with 6 mass pct of antimony on the industrial-scale equipment. As the result of the decopperization process, copper is removed in the form of the cathode sludge and is precipitated at the bottom of the electrolytic cell. By this procedure, the content of copper could be reduced to the 20 mass pct of the initial value. Chemical characterization of the sludge has shown that it contains about 90 mass pct of copper. During the decopperization process, the very strong poison, arsine, can be formed, and the process is in that case terminated. The copper leaching degree of 82 mass pct is obtained using H2SO4 aqueous solution with the oxygen addition during the cathode sludge chemical treatment at 80 °C ± 5 °C. Obtained copper salt satisfies the requirements of the Serbian Standard for Pesticide, SRPS H.P1. 058. Therefore, the treatment of waste sulfuric acid solutions is of great economic and environmental interest.
PB  - Springer US
T2  - Metallurgical and Materials Transactions B
T1  - Copper-Sulfate Pentahydrate as a Product of the Waste Sulfuric Acid Solution Treatment
SP  - 1388
EP  - 1392
VL  - 43
IS  - 6
DO  - 10.1007/s11663-012-9721-8
UR  - https://hdl.handle.net/21.15107/rcub_dais_478
ER  - 
@article{
author = "Marković, Radmila and Stevanović, Jasmina S. and Avramović, Ljiljana and Nedeljković, Dragutin and Jugović, Branimir and Stajić Trošić, Jasna and Gvozdenović, Milica M.",
year = "2012",
abstract = "The aim of this study is synthesis of copper-sulfate pentahydrate from the waste sulfuric acid solution-mother liquor generated during the regeneration process of copper bleed solution. Copper is removed from the mother liquor solution in the process of the electrolytic treatment using the insoluble lead anodes alloyed with 6 mass pct of antimony on the industrial-scale equipment. As the result of the decopperization process, copper is removed in the form of the cathode sludge and is precipitated at the bottom of the electrolytic cell. By this procedure, the content of copper could be reduced to the 20 mass pct of the initial value. Chemical characterization of the sludge has shown that it contains about 90 mass pct of copper. During the decopperization process, the very strong poison, arsine, can be formed, and the process is in that case terminated. The copper leaching degree of 82 mass pct is obtained using H2SO4 aqueous solution with the oxygen addition during the cathode sludge chemical treatment at 80 °C ± 5 °C. Obtained copper salt satisfies the requirements of the Serbian Standard for Pesticide, SRPS H.P1. 058. Therefore, the treatment of waste sulfuric acid solutions is of great economic and environmental interest.",
publisher = "Springer US",
journal = "Metallurgical and Materials Transactions B",
title = "Copper-Sulfate Pentahydrate as a Product of the Waste Sulfuric Acid Solution Treatment",
pages = "1388-1392",
volume = "43",
number = "6",
doi = "10.1007/s11663-012-9721-8",
url = "https://hdl.handle.net/21.15107/rcub_dais_478"
}
Marković, R., Stevanović, J. S., Avramović, L., Nedeljković, D., Jugović, B., Stajić Trošić, J.,& Gvozdenović, M. M. (2012). Copper-Sulfate Pentahydrate as a Product of the Waste Sulfuric Acid Solution Treatment.
Metallurgical and Materials Transactions B
Springer US., 43(6), 1388-1392.
https://doi.org/10.1007/s11663-012-9721-8
Marković R, Stevanović JS, Avramović L, Nedeljković D, Jugović B, Stajić Trošić J, Gvozdenović MM. Copper-Sulfate Pentahydrate as a Product of the Waste Sulfuric Acid Solution Treatment. Metallurgical and Materials Transactions B. 2012;43(6):1388-1392.
doi:10.1007/s11663-012-9721-8.
Marković Radmila, Stevanović Jasmina S., Avramović Ljiljana, Nedeljković Dragutin, Jugović Branimir, Stajić Trošić Jasna, Gvozdenović Milica M., "Copper-Sulfate Pentahydrate as a Product of the Waste Sulfuric Acid Solution Treatment" Metallurgical and Materials Transactions B, 43, no. 6 (2012):1388-1392,
https://doi.org/10.1007/s11663-012-9721-8 .
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