TY  - JOUR
AU  - Avramović, Ljiljana
AU  - Maksimović, Vesna M
AU  - Baščarević, Zvezdana
AU  - Ignjatović, Nenad
AU  - Bugarin, Mile
AU  - Marković, Radmila
AU  - Nikolic, Nebojša D.
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1235
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  - MDPI, Basel
T2  - Metals
T1  - Influence of the Shape of Copper Powder Particles on the Crystal Structure and Some Decisive Characteristics of the Metal Powders
IS  - 1
VL  - 9
DO  - 10.3390/met9010056
ER  - 

@article{
author = "Avramović, Ljiljana and Maksimović, Vesna M and Baščarević, Zvezdana and Ignjatović, Nenad and Bugarin, Mile and Marković, Radmila and Nikolic, 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 = "MDPI, Basel",
journal = "Metals",
title = "Influence of the Shape of Copper Powder Particles on the Crystal Structure and Some Decisive Characteristics of the Metal Powders",
number = "1",
volume = "9",
doi = "10.3390/met9010056"
}

Avramović, L., Maksimović, V. M., Baščarević, Z., Ignjatović, N., Bugarin, M., Marković, R.,& Nikolic, N. D.. (2019). Influence of the Shape of Copper Powder Particles on the Crystal Structure and Some Decisive Characteristics of the Metal Powders. in Metals
MDPI, Basel., 9(1).
https://doi.org/10.3390/met9010056

Avramović L, Maksimović VM, Baščarević Z, Ignjatović N, Bugarin M, Marković R, Nikolic ND. Influence of the Shape of Copper Powder Particles on the Crystal Structure and Some Decisive Characteristics of the Metal Powders. in Metals. 2019;9(1).
doi:10.3390/met9010056 .

Avramović, Ljiljana, Maksimović, Vesna M, Baščarević, Zvezdana, Ignjatović, Nenad, Bugarin, Mile, Marković, Radmila, Nikolic, Nebojša D., "Influence of the Shape of Copper Powder Particles on the Crystal Structure and Some Decisive Characteristics of the Metal Powders" in Metals, 9, no. 1 (2019),
https://doi.org/10.3390/met9010056 . .

TY  - JOUR
AU  - Nikolic, Nebojša D.
AU  - Avramović, Ljiljana
AU  - Ivanović, Evica R.
AU  - Maksimović, Vesna M
AU  - Baščarević, Zvezdana
AU  - Ignjatović, Nenad
PY  - 2019
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1231
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 = "Nikolic, 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 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"
}

Nikolic, 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. 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

Nikolic ND, Avramović L, Ivanović ER, 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 .

Nikolic, 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" 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  - CONF
AU  - Nikolic, Nebojsa
AU  - Avramović, Ljiljana
AU  - Maksimović, Vesna M
AU  - Pavlović, Miroslav
AU  - Perać, Sanja
AU  - Stevanovic, Jasmina
AU  - Bugarin, Mile
PY  - 2017
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/2880
AB  - Silver powder particles of nanostructured characteristics were produced by the galvanostatic regime of electrolysis and compared with those obtained by chemical reduction with hydrazine.
Morphology of all types of powder particles was examined by the technique of scanning electron
microscopy (SEM), while crystallographic characteristics were examined by the X-ray diffraction
(XRD) analysis of the obtained particles. Morphology of the electrochemically produced powder
particles strongly depended on the type of used electrolyte. The irregular crystals and the needlelike dendrites were predominately formed from the nitrate (acid) electrolyte. On the other hand, the 3D pine-like dendrites very similar to Cu dendrites [1] were formed by the electrodeposition from the ammonium (alcali) electrolyte. Simultaneously, the particles of spherical shape were formed by chemical reduction with hydrazine. The difference in morphology of electrochemically produced Ag powders can be explained by different rate of the electrochemical process by which they are formed. Namely, the ammonium electrolyte belongs to the group of the complex electrolyte and formation of this complex lowers the exchange current density for Ag causing a transfer of Ag from the group of the normal metals (metals with the high values of the exchange current density) to the group of the intermediate metals (metals with the medium values of the exchange current density). Irrespective of the way of preparation of Ag powder, Ag crystallites in all types of powder particles were predominantly oriented in the (111) plane. Formation of powder particles of the different shape with the strong (111) preferred orientation was discussed and explained by the consideration of the general characteristics of the growth of a crystal in the crystallization and electrocrystallization processes. Analogy between these two types of processes was made and discussed.
PB  - Bulgaria, Sofia : Institute of Physical Chemistry, Bulgarian Academy of Science
C3  - 12th International Workshop on Electrodeposited Nanostructures (EDNANO - 12)
T1  - Comparative analysis of chemically and electrochemically produced silver powders of nanostructural characteristics
SP  - 47
UR  - https://hdl.handle.net/21.15107/rcub_rimsi_2880
ER  - 

@conference{
author = "Nikolic, Nebojsa and Avramović, Ljiljana and Maksimović, Vesna M and Pavlović, Miroslav and Perać, Sanja and Stevanovic, Jasmina and Bugarin, Mile",
year = "2017",
abstract = "Silver powder particles of nanostructured characteristics were produced by the galvanostatic regime of electrolysis and compared with those obtained by chemical reduction with hydrazine.
Morphology of all types of powder particles was examined by the technique of scanning electron
microscopy (SEM), while crystallographic characteristics were examined by the X-ray diffraction
(XRD) analysis of the obtained particles. Morphology of the electrochemically produced powder
particles strongly depended on the type of used electrolyte. The irregular crystals and the needlelike dendrites were predominately formed from the nitrate (acid) electrolyte. On the other hand, the 3D pine-like dendrites very similar to Cu dendrites [1] were formed by the electrodeposition from the ammonium (alcali) electrolyte. Simultaneously, the particles of spherical shape were formed by chemical reduction with hydrazine. The difference in morphology of electrochemically produced Ag powders can be explained by different rate of the electrochemical process by which they are formed. Namely, the ammonium electrolyte belongs to the group of the complex electrolyte and formation of this complex lowers the exchange current density for Ag causing a transfer of Ag from the group of the normal metals (metals with the high values of the exchange current density) to the group of the intermediate metals (metals with the medium values of the exchange current density). Irrespective of the way of preparation of Ag powder, Ag crystallites in all types of powder particles were predominantly oriented in the (111) plane. Formation of powder particles of the different shape with the strong (111) preferred orientation was discussed and explained by the consideration of the general characteristics of the growth of a crystal in the crystallization and electrocrystallization processes. Analogy between these two types of processes was made and discussed.",
publisher = "Bulgaria, Sofia : Institute of Physical Chemistry, Bulgarian Academy of Science",
journal = "12th International Workshop on Electrodeposited Nanostructures (EDNANO - 12)",
title = "Comparative analysis of chemically and electrochemically produced silver powders of nanostructural characteristics",
pages = "47",
url = "https://hdl.handle.net/21.15107/rcub_rimsi_2880"
}

Nikolic, N., Avramović, L., Maksimović, V. M., Pavlović, M., Perać, S., Stevanovic, J.,& Bugarin, M.. (2017). Comparative analysis of chemically and electrochemically produced silver powders of nanostructural characteristics. in 12th International Workshop on Electrodeposited Nanostructures (EDNANO - 12)
Bulgaria, Sofia : Institute of Physical Chemistry, Bulgarian Academy of Science., 47.
https://hdl.handle.net/21.15107/rcub_rimsi_2880

Nikolic N, Avramović L, Maksimović VM, Pavlović M, Perać S, Stevanovic J, Bugarin M. Comparative analysis of chemically and electrochemically produced silver powders of nanostructural characteristics. in 12th International Workshop on Electrodeposited Nanostructures (EDNANO - 12). 2017;:47.
https://hdl.handle.net/21.15107/rcub_rimsi_2880 .

Nikolic, Nebojsa, Avramović, Ljiljana, Maksimović, Vesna M, Pavlović, Miroslav, Perać, Sanja, Stevanovic, Jasmina, Bugarin, Mile, "Comparative analysis of chemically and electrochemically produced silver powders of nanostructural characteristics" in 12th International Workshop on Electrodeposited Nanostructures (EDNANO - 12) (2017):47,
https://hdl.handle.net/21.15107/rcub_rimsi_2880 .