TY  - JOUR
AU  - Brajovic, Ljiljana M.
AU  - Stojanović, Dušica B.
AU  - Mihailovic, Pedja
AU  - Marković, Smilja
AU  - Romčević, Maja J.
AU  - Mitrić, Miodrag
AU  - Lazović, Vladimir M.
AU  - Dramlić, Dragan M.
AU  - Petričević, Slobodan
AU  - Romčević, Nebojša Ž.
PY  - 2017
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1380
AB  - Bismuth germanium oxide Bi12GeO20 (BGO) has very interesting electrical, optical and magnetic properties. In order to make devices based on this material more flexible, its powder was used for preparing polymer composites. This study reports investigation of the effects of using different solvents and polymers in preparation of BGO composite on the microstructural and optical behaviour of the resulting material. Preparation of such composites by a solution casting method is described. Poly (methyl methacrylate) (PMMA) and polystyrene (PS)) were used as matrix materials and acetone and chloroform as solvents. Their microstructure and the quality of BGO dispersion and deaggregation in polymer matrix were analyzed by SEM, Raman, XRD and optical spectroscopy. The influence of particle size distribution, their shapes, and concentration on the optical transmission is calculated based on Mie scattering theory and discussed, too. (C) 2016 Elsevier B.V. All rights reserved.
T2  - Journal of Alloys and Compounds
T1  - Preparation and characterization of bismuth germanium oxide (BGO) polymer composites
VL  - 695
SP  - 841
EP  - 849
DO  - 10.1016/j.jallcom.2016.10.140
ER  - 

@article{
author = "Brajovic, Ljiljana M. and Stojanović, Dušica B. and Mihailovic, Pedja and Marković, Smilja and Romčević, Maja J. and Mitrić, Miodrag and Lazović, Vladimir M. and Dramlić, Dragan M. and Petričević, Slobodan and Romčević, Nebojša Ž.",
year = "2017",
abstract = "Bismuth germanium oxide Bi12GeO20 (BGO) has very interesting electrical, optical and magnetic properties. In order to make devices based on this material more flexible, its powder was used for preparing polymer composites. This study reports investigation of the effects of using different solvents and polymers in preparation of BGO composite on the microstructural and optical behaviour of the resulting material. Preparation of such composites by a solution casting method is described. Poly (methyl methacrylate) (PMMA) and polystyrene (PS)) were used as matrix materials and acetone and chloroform as solvents. Their microstructure and the quality of BGO dispersion and deaggregation in polymer matrix were analyzed by SEM, Raman, XRD and optical spectroscopy. The influence of particle size distribution, their shapes, and concentration on the optical transmission is calculated based on Mie scattering theory and discussed, too. (C) 2016 Elsevier B.V. All rights reserved.",
journal = "Journal of Alloys and Compounds",
title = "Preparation and characterization of bismuth germanium oxide (BGO) polymer composites",
volume = "695",
pages = "841-849",
doi = "10.1016/j.jallcom.2016.10.140"
}

Brajovic, L. M., Stojanović, D. B., Mihailovic, P., Marković, S., Romčević, M. J., Mitrić, M., Lazović, V. M., Dramlić, D. M., Petričević, S.,& Romčević, N. Ž.. (2017). Preparation and characterization of bismuth germanium oxide (BGO) polymer composites. in Journal of Alloys and Compounds, 695, 841-849.
https://doi.org/10.1016/j.jallcom.2016.10.140

Brajovic LM, Stojanović DB, Mihailovic P, Marković S, Romčević MJ, Mitrić M, Lazović VM, Dramlić DM, Petričević S, Romčević NŽ. Preparation and characterization of bismuth germanium oxide (BGO) polymer composites. in Journal of Alloys and Compounds. 2017;695:841-849.
doi:10.1016/j.jallcom.2016.10.140 .

Brajovic, Ljiljana M., Stojanović, Dušica B., Mihailovic, Pedja, Marković, Smilja, Romčević, Maja J., Mitrić, Miodrag, Lazović, Vladimir M., Dramlić, Dragan M., Petričević, Slobodan, Romčević, Nebojša Ž., "Preparation and characterization of bismuth germanium oxide (BGO) polymer composites" in Journal of Alloys and Compounds, 695 (2017):841-849,
https://doi.org/10.1016/j.jallcom.2016.10.140 . .

TY  - JOUR
AU  - Terzić, Marijana M.
AU  - Milošević, Nenad D.
AU  - Stepanić, Nenad
AU  - Petričević, Slobodan
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1154
AB  - This work presents the development of an experimental set-up for measurements of thermal conductivity of solid materials, such as ceramics, polymers, rubbers, glasses, biological materials, etc. whose thermal conductivity lies in the approximate range between 0.1 and 2 W/mk The set-up was designed on the principle of the single-sided guarded hot plate method. In order to find the optimal design for generation of traceable 1-D heat flux through an investigated 300 mm x 300 mm specimen, a numerical heat transfer finite element method analysis was performed. The principal components of the measuring apparatus, such as hot plate with thermopile, cold plate, and auxiliary hot plate, were constructed according to the obtained results of simulations. Software for the control of experiment and data acquisition was developed using the LabVIEW programming environment.
T2  - Thermal Science
T1  - Development of a Single-Sided Guarded Hot Plate Apparatus for Thermal Conductivity Measurements
VL  - 20
SP  - S321
EP  - S329
DO  - 10.2298/TSCI151009226T
ER  - 

@article{
author = "Terzić, Marijana M. and Milošević, Nenad D. and Stepanić, Nenad and Petričević, Slobodan",
year = "2016",
abstract = "This work presents the development of an experimental set-up for measurements of thermal conductivity of solid materials, such as ceramics, polymers, rubbers, glasses, biological materials, etc. whose thermal conductivity lies in the approximate range between 0.1 and 2 W/mk The set-up was designed on the principle of the single-sided guarded hot plate method. In order to find the optimal design for generation of traceable 1-D heat flux through an investigated 300 mm x 300 mm specimen, a numerical heat transfer finite element method analysis was performed. The principal components of the measuring apparatus, such as hot plate with thermopile, cold plate, and auxiliary hot plate, were constructed according to the obtained results of simulations. Software for the control of experiment and data acquisition was developed using the LabVIEW programming environment.",
journal = "Thermal Science",
title = "Development of a Single-Sided Guarded Hot Plate Apparatus for Thermal Conductivity Measurements",
volume = "20",
pages = "S321-S329",
doi = "10.2298/TSCI151009226T"
}

Terzić, M. M., Milošević, N. D., Stepanić, N.,& Petričević, S.. (2016). Development of a Single-Sided Guarded Hot Plate Apparatus for Thermal Conductivity Measurements. in Thermal Science, 20, S321-S329.
https://doi.org/10.2298/TSCI151009226T

Terzić MM, Milošević ND, Stepanić N, Petričević S. Development of a Single-Sided Guarded Hot Plate Apparatus for Thermal Conductivity Measurements. in Thermal Science. 2016;20:S321-S329.
doi:10.2298/TSCI151009226T .

Terzić, Marijana M., Milošević, Nenad D., Stepanić, Nenad, Petričević, Slobodan, "Development of a Single-Sided Guarded Hot Plate Apparatus for Thermal Conductivity Measurements" in Thermal Science, 20 (2016):S321-S329,
https://doi.org/10.2298/TSCI151009226T . .

TY  - JOUR
AU  - Kovačević, Aleksander
AU  - Ristić-Đurović, Jasna L.
AU  - Lekic, Marina
AU  - Hadžić, Branka B.
AU  - Abudagel, Giuma Saleh Isa
AU  - Petričević, Slobodan
AU  - Mihailovic, Pedja
AU  - Matović, Branko
AU  - Dramlić, Dragan M.
AU  - Brajovic, Ljiljana M.
AU  - Romčević, Nebojša Ž.
PY  - 2016
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/1235
AB  - High quality bismuth germanium oxide single crystals were irradiated by a femtosecond pulsed laser beam of increasing power. Analyses performed on irradiated and unirradiated samples showed significant changes in transmittance, transmission spectra, sample color, Raman spectra, X-ray diffraction (XRD) pattern, Verdet constant, magneto-optical property, and absorption coefficient. After irradiation, the transmission spectra values increased whereas anisotropy detected in the transmission spectra of unirradiated samples disappeared. The change of color caused by irradiation was noticeable to the naked eye. The XRD measurements confirmed structural changes induced by laser irradiation, i.e., the laser-beam-incident side of the sample became almost amorphous, whereas the side opposite to the incident can be indexed to the Bi12GeO20 compound. Irradiation caused increase of Raman spectra peaks with the exception of crystal peaks of type E, which disappeared. The femtosecond pulsed laser irradiation can be used to improve bismuth germanium oxide single crystal optical properties. (C) 2016 Elsevier Ltd. All rights reserved.
T2  - Materials Research Bulletin
T1  - Influence of femtosecond pulsed laser irradiation on bismuth germanium oxide single crystal properties
VL  - 83
SP  - 284
EP  - 289
DO  - 10.1016/j.materresbull.2016.06.023
ER  - 

@article{
author = "Kovačević, Aleksander and Ristić-Đurović, Jasna L. and Lekic, Marina and Hadžić, Branka B. and Abudagel, Giuma Saleh Isa and Petričević, Slobodan and Mihailovic, Pedja and Matović, Branko and Dramlić, Dragan M. and Brajovic, Ljiljana M. and Romčević, Nebojša Ž.",
year = "2016",
abstract = "High quality bismuth germanium oxide single crystals were irradiated by a femtosecond pulsed laser beam of increasing power. Analyses performed on irradiated and unirradiated samples showed significant changes in transmittance, transmission spectra, sample color, Raman spectra, X-ray diffraction (XRD) pattern, Verdet constant, magneto-optical property, and absorption coefficient. After irradiation, the transmission spectra values increased whereas anisotropy detected in the transmission spectra of unirradiated samples disappeared. The change of color caused by irradiation was noticeable to the naked eye. The XRD measurements confirmed structural changes induced by laser irradiation, i.e., the laser-beam-incident side of the sample became almost amorphous, whereas the side opposite to the incident can be indexed to the Bi12GeO20 compound. Irradiation caused increase of Raman spectra peaks with the exception of crystal peaks of type E, which disappeared. The femtosecond pulsed laser irradiation can be used to improve bismuth germanium oxide single crystal optical properties. (C) 2016 Elsevier Ltd. All rights reserved.",
journal = "Materials Research Bulletin",
title = "Influence of femtosecond pulsed laser irradiation on bismuth germanium oxide single crystal properties",
volume = "83",
pages = "284-289",
doi = "10.1016/j.materresbull.2016.06.023"
}

Kovačević, A., Ristić-Đurović, J. L., Lekic, M., Hadžić, B. B., Abudagel, G. S. I., Petričević, S., Mihailovic, P., Matović, B., Dramlić, D. M., Brajovic, L. M.,& Romčević, N. Ž.. (2016). Influence of femtosecond pulsed laser irradiation on bismuth germanium oxide single crystal properties. in Materials Research Bulletin, 83, 284-289.
https://doi.org/10.1016/j.materresbull.2016.06.023

Kovačević A, Ristić-Đurović JL, Lekic M, Hadžić BB, Abudagel GSI, Petričević S, Mihailovic P, Matović B, Dramlić DM, Brajovic LM, Romčević NŽ. Influence of femtosecond pulsed laser irradiation on bismuth germanium oxide single crystal properties. in Materials Research Bulletin. 2016;83:284-289.
doi:10.1016/j.materresbull.2016.06.023 .

Kovačević, Aleksander, Ristić-Đurović, Jasna L., Lekic, Marina, Hadžić, Branka B., Abudagel, Giuma Saleh Isa, Petričević, Slobodan, Mihailovic, Pedja, Matović, Branko, Dramlić, Dragan M., Brajovic, Ljiljana M., Romčević, Nebojša Ž., "Influence of femtosecond pulsed laser irradiation on bismuth germanium oxide single crystal properties" in Materials Research Bulletin, 83 (2016):284-289,
https://doi.org/10.1016/j.materresbull.2016.06.023 . .