TY  - CONF
AU  - Veselinović, Ljiljana
AU  - Mitrić, Miodrag
AU  - Mančić, Lidija
AU  - Jardim, Paula M.
AU  - Škapin, Srečo Davor
AU  - Cvjetićanin, N.
AU  - Marković, S.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10779
AB  - The CaCu3 Ti 4 O12 belongs to the large ACu3B4 O12 family of materials. Crystallographic A site is most often occupied by alkaline-earth metals or lanthanides, while B site is occupied by transition metals. The type of cations that build up the structure strongly affects the properties of these. The CaCu 3 Ti 4 O12 has been extensively studied due to its high dielectric permittivity stable over a wide temperature and frequency range (up to 10 5 , for 100-600 K and 10 2 –105 Hz). Because of such characteristics, it has promising application in microelectronics. However, it has been shown that differences in the crystal structure and electrical properties of dielectric ceramics and metallic electrodes, may cause an energy barrier and occurrence of stress on the ceramic-electrode contact which reduces dielectric permittivity. Such stress can be prevented by using dielectric and electrode materials with as much as possible similar crystal structure, especially unit cell parameters. This investigation dealt with detailed structural (XRPD, HRTEM, SAED), dielectric and magnetic study of CaCu 3 Ti 4-xRuxO12 (CCTRO, x = 0, 1 and 4) materials. The results of structural refinement show that in cubic symmetry with space group 3Im , both titanium and ruthenium ions occupied crystallographic B site. Moreover, the variation in stoichiometry slightly affects the value of the unit cell parameters but changes electrical properties of studied material. Thus, substitution of even one atom of Ru in CaCu3 Ti 4-xRuxO12 unit cell is enough to change material properties from dielectric to conductor solving the problem of stress appearance on the contact layer of dielectric/electrode in capacitors.
PB  - Belgrade : Serbian Ceramic Society
C3  - Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade
T1  - CaCu3Ti4-xRuxO12: Crystal structure, electrical and magnetic properties
SP  - 32
UR  - https://hdl.handle.net/21.15107/rcub_vinar_10779
ER  - 

@conference{
author = "Veselinović, Ljiljana and Mitrić, Miodrag and Mančić, Lidija and Jardim, Paula M. and Škapin, Srečo Davor and Cvjetićanin, N. and Marković, S.",
year = "2021",
abstract = "The CaCu3 Ti 4 O12 belongs to the large ACu3B4 O12 family of materials. Crystallographic A site is most often occupied by alkaline-earth metals or lanthanides, while B site is occupied by transition metals. The type of cations that build up the structure strongly affects the properties of these. The CaCu 3 Ti 4 O12 has been extensively studied due to its high dielectric permittivity stable over a wide temperature and frequency range (up to 10 5 , for 100-600 K and 10 2 –105 Hz). Because of such characteristics, it has promising application in microelectronics. However, it has been shown that differences in the crystal structure and electrical properties of dielectric ceramics and metallic electrodes, may cause an energy barrier and occurrence of stress on the ceramic-electrode contact which reduces dielectric permittivity. Such stress can be prevented by using dielectric and electrode materials with as much as possible similar crystal structure, especially unit cell parameters. This investigation dealt with detailed structural (XRPD, HRTEM, SAED), dielectric and magnetic study of CaCu 3 Ti 4-xRuxO12 (CCTRO, x = 0, 1 and 4) materials. The results of structural refinement show that in cubic symmetry with space group 3Im , both titanium and ruthenium ions occupied crystallographic B site. Moreover, the variation in stoichiometry slightly affects the value of the unit cell parameters but changes electrical properties of studied material. Thus, substitution of even one atom of Ru in CaCu3 Ti 4-xRuxO12 unit cell is enough to change material properties from dielectric to conductor solving the problem of stress appearance on the contact layer of dielectric/electrode in capacitors.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade",
title = "CaCu3Ti4-xRuxO12: Crystal structure, electrical and magnetic properties",
pages = "32",
url = "https://hdl.handle.net/21.15107/rcub_vinar_10779"
}

Veselinović, L., Mitrić, M., Mančić, L., Jardim, P. M., Škapin, S. D., Cvjetićanin, N.,& Marković, S.. (2021). CaCu3Ti4-xRuxO12: Crystal structure, electrical and magnetic properties. in Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade
Belgrade : Serbian Ceramic Society., 32.
https://hdl.handle.net/21.15107/rcub_vinar_10779

Veselinović L, Mitrić M, Mančić L, Jardim PM, Škapin SD, Cvjetićanin N, Marković S. CaCu3Ti4-xRuxO12: Crystal structure, electrical and magnetic properties. in Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade. 2021;:32.
https://hdl.handle.net/21.15107/rcub_vinar_10779 .

Veselinović, Ljiljana, Mitrić, Miodrag, Mančić, Lidija, Jardim, Paula M., Škapin, Srečo Davor, Cvjetićanin, N., Marković, S., "CaCu3Ti4-xRuxO12: Crystal structure, electrical and magnetic properties" in Advanced Ceramics and Application : 9th Serbian Ceramic Society Conference : program and the book of abstracts; September 20-21, 2021; Belgrade (2021):32,
https://hdl.handle.net/21.15107/rcub_vinar_10779 .

TY  - JOUR
AU  - Ciraj-Bjelac, Olivera
AU  - Košutić, Duško D.
AU  - Kovačević, Milojko
AU  - Marković, S
PY  - 2005
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/3034
AB  - Diagnostic reference levels provide framework to reduce variability. The aim of this study is to establish, for the first time, a baseline for national diagnostic reference levels in Serbia and Montenegro for the most common X-ray examination types. Measurements of patient dose using kerma-area product meter and entrance surface air kerma assessment were performed on at least ten patients for each examination type, in each of 16 randomly selected hospitals in Serbia and Montenegro, so that a total of 3,026 procedures for nine different examination categories were included in the survey. Exposure settings and individual data were recorded for each patient. Mean, median and third quartile values of patient doses are reported. Results have shown wide variation of mean hospital doses, with a factor of four for barium enema to 23 for thoracic spine radiography. Entrance surface air kerma were compared with previously published diagnostic reference levels (DRL) proposed by Commission of European Communities (CEC). Doses for all studied examination types except chest radiography were within European DRL. The reasons for dose variation are discussed. Survey data are aimed to help in development of an on-going national quality assurance and quality control programme in diagnostic radiology. The findings emphasize the importance of regular patient dose measurement to ensure that patient doses are kept as low as reasonable achievable.
T2  - Physica Medica
T1  - A survey of patient doses from conventional diagnostic radiology examinations: first results from Serbia and Montenegro
VL  - 21
IS  - 4
SP  - 159
EP  - 163
DO  - 10.1016/S1120-1797(05)80005-5
ER  - 

@article{
author = "Ciraj-Bjelac, Olivera and Košutić, Duško D. and Kovačević, Milojko and Marković, S",
year = "2005",
abstract = "Diagnostic reference levels provide framework to reduce variability. The aim of this study is to establish, for the first time, a baseline for national diagnostic reference levels in Serbia and Montenegro for the most common X-ray examination types. Measurements of patient dose using kerma-area product meter and entrance surface air kerma assessment were performed on at least ten patients for each examination type, in each of 16 randomly selected hospitals in Serbia and Montenegro, so that a total of 3,026 procedures for nine different examination categories were included in the survey. Exposure settings and individual data were recorded for each patient. Mean, median and third quartile values of patient doses are reported. Results have shown wide variation of mean hospital doses, with a factor of four for barium enema to 23 for thoracic spine radiography. Entrance surface air kerma were compared with previously published diagnostic reference levels (DRL) proposed by Commission of European Communities (CEC). Doses for all studied examination types except chest radiography were within European DRL. The reasons for dose variation are discussed. Survey data are aimed to help in development of an on-going national quality assurance and quality control programme in diagnostic radiology. The findings emphasize the importance of regular patient dose measurement to ensure that patient doses are kept as low as reasonable achievable.",
journal = "Physica Medica",
title = "A survey of patient doses from conventional diagnostic radiology examinations: first results from Serbia and Montenegro",
volume = "21",
number = "4",
pages = "159-163",
doi = "10.1016/S1120-1797(05)80005-5"
}

Ciraj-Bjelac, O., Košutić, D. D., Kovačević, M.,& Marković, S.. (2005). A survey of patient doses from conventional diagnostic radiology examinations: first results from Serbia and Montenegro. in Physica Medica, 21(4), 159-163.
https://doi.org/10.1016/S1120-1797(05)80005-5

Ciraj-Bjelac O, Košutić DD, Kovačević M, Marković S. A survey of patient doses from conventional diagnostic radiology examinations: first results from Serbia and Montenegro. in Physica Medica. 2005;21(4):159-163.
doi:10.1016/S1120-1797(05)80005-5 .

Ciraj-Bjelac, Olivera, Košutić, Duško D., Kovačević, Milojko, Marković, S, "A survey of patient doses from conventional diagnostic radiology examinations: first results from Serbia and Montenegro" in Physica Medica, 21, no. 4 (2005):159-163,
https://doi.org/10.1016/S1120-1797(05)80005-5 . .

TY  - JOUR
AU  - Ciraj-Bjelac, Olivera
AU  - Marković, S
AU  - Košutić, Duško D.
PY  - 2005
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/2891
AB  - The objective of this work is to assess patient doses for the most frequent X-ray examinations for the first time in Serbia and Montenegro. A total of 510 procedures for 11 different examination categories in 3 general hospitals were analysed. Mean and median entrance surface air kerma (ESAK) and kerma area product (KAP) values followed by mean effective doses were reported. Using X-ray tube output data, ESAK for each radiographic examination was calculated, as well as the effective dose for each patient. Except for chest PA examination, all estimated doses are less than stated European and International Atomic Energy Agency (IAEA) reference levels for simple radiographic examinations. For complex examinations involving fluoroscopy and radiography total KAP was measured and contributions from fluoroscopy and radiography were assessed. The study of KAP confirms that the dose level for complex fluoroscopy investigations is closely related to the technique and individual patient variation in terms of fluoroscopy time and number of radiography exposures. The obtained values are comparable to those reported in the UK. Survey data are aimed aid development of a national quality control and radiation protection programme for medical exposures.
T2  - Radiation Protection Dosimetry
T1  - First results on patient dose measurements from conventional diagnostic radiology procedures in Serbia and Montenegro
VL  - 113
IS  - 3
SP  - 330
EP  - 335
DO  - 10.1093/rpd/nch469
ER  - 

@article{
author = "Ciraj-Bjelac, Olivera and Marković, S and Košutić, Duško D.",
year = "2005",
abstract = "The objective of this work is to assess patient doses for the most frequent X-ray examinations for the first time in Serbia and Montenegro. A total of 510 procedures for 11 different examination categories in 3 general hospitals were analysed. Mean and median entrance surface air kerma (ESAK) and kerma area product (KAP) values followed by mean effective doses were reported. Using X-ray tube output data, ESAK for each radiographic examination was calculated, as well as the effective dose for each patient. Except for chest PA examination, all estimated doses are less than stated European and International Atomic Energy Agency (IAEA) reference levels for simple radiographic examinations. For complex examinations involving fluoroscopy and radiography total KAP was measured and contributions from fluoroscopy and radiography were assessed. The study of KAP confirms that the dose level for complex fluoroscopy investigations is closely related to the technique and individual patient variation in terms of fluoroscopy time and number of radiography exposures. The obtained values are comparable to those reported in the UK. Survey data are aimed aid development of a national quality control and radiation protection programme for medical exposures.",
journal = "Radiation Protection Dosimetry",
title = "First results on patient dose measurements from conventional diagnostic radiology procedures in Serbia and Montenegro",
volume = "113",
number = "3",
pages = "330-335",
doi = "10.1093/rpd/nch469"
}

Ciraj-Bjelac, O., Marković, S.,& Košutić, D. D.. (2005). First results on patient dose measurements from conventional diagnostic radiology procedures in Serbia and Montenegro. in Radiation Protection Dosimetry, 113(3), 330-335.
https://doi.org/10.1093/rpd/nch469

Ciraj-Bjelac O, Marković S, Košutić DD. First results on patient dose measurements from conventional diagnostic radiology procedures in Serbia and Montenegro. in Radiation Protection Dosimetry. 2005;113(3):330-335.
doi:10.1093/rpd/nch469 .

Ciraj-Bjelac, Olivera, Marković, S, Košutić, Duško D., "First results on patient dose measurements from conventional diagnostic radiology procedures in Serbia and Montenegro" in Radiation Protection Dosimetry, 113, no. 3 (2005):330-335,
https://doi.org/10.1093/rpd/nch469 . .

TY  - CONF
AU  - Marković, S.
AU  - Cvjetićanin, Nikola
AU  - Mitrić, Miodrag
AU  - Uskoković, Dragan
PY  - 2004
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9571
AB  - BaTi1-xSnxO3 (BTS) ceramic powders, with different tin content (x = 0-1) were prepared. The BTS powders were calcined at 1370 °C for 4 hours. The structure of these powders was characterized by XRPD method, tetragonal and cubic crystal structures were noticed. Powders were pressed in pellets and sintered at 1370 °C for 1 hour. The dielectric properties of BTS ceramics were measured and the results were reported.
PB  - Society of Physical Chemists of Serbia
C3  - Physical chemistry 2004: 7th international conference on fundemental and applied aspract of physical chemistry
T1  - Structure and dielectric caracteristics of BaTi1-xSnxO3 ceramic powders
VL  - 2
SP  - 526
EP  - 528
UR  - https://hdl.handle.net/21.15107/rcub_vinar_9571
ER  - 

@conference{
author = "Marković, S. and Cvjetićanin, Nikola and Mitrić, Miodrag and Uskoković, Dragan",
year = "2004",
abstract = "BaTi1-xSnxO3 (BTS) ceramic powders, with different tin content (x = 0-1) were prepared. The BTS powders were calcined at 1370 °C for 4 hours. The structure of these powders was characterized by XRPD method, tetragonal and cubic crystal structures were noticed. Powders were pressed in pellets and sintered at 1370 °C for 1 hour. The dielectric properties of BTS ceramics were measured and the results were reported.",
publisher = "Society of Physical Chemists of Serbia",
journal = "Physical chemistry 2004: 7th international conference on fundemental and applied aspract of physical chemistry",
title = "Structure and dielectric caracteristics of BaTi1-xSnxO3 ceramic powders",
volume = "2",
pages = "526-528",
url = "https://hdl.handle.net/21.15107/rcub_vinar_9571"
}

Marković, S., Cvjetićanin, N., Mitrić, M.,& Uskoković, D.. (2004). Structure and dielectric caracteristics of BaTi1-xSnxO3 ceramic powders. in Physical chemistry 2004: 7th international conference on fundemental and applied aspract of physical chemistry
Society of Physical Chemists of Serbia., 2, 526-528.
https://hdl.handle.net/21.15107/rcub_vinar_9571

Marković S, Cvjetićanin N, Mitrić M, Uskoković D. Structure and dielectric caracteristics of BaTi1-xSnxO3 ceramic powders. in Physical chemistry 2004: 7th international conference on fundemental and applied aspract of physical chemistry. 2004;2:526-528.
https://hdl.handle.net/21.15107/rcub_vinar_9571 .

Marković, S., Cvjetićanin, Nikola, Mitrić, Miodrag, Uskoković, Dragan, "Structure and dielectric caracteristics of BaTi1-xSnxO3 ceramic powders" in Physical chemistry 2004: 7th international conference on fundemental and applied aspract of physical chemistry, 2 (2004):526-528,
https://hdl.handle.net/21.15107/rcub_vinar_9571 .

TY  - CONF
AU  - Ciraj-Bjelac, Olivera
AU  - Košutić, Duško D.
AU  - Marković, S.
PY  - 2002
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/6399
AB  - The estimation of doses received by patients undergoing radiological examinations is presented. The results are presented, in terms of entrance surface doses (ESD) and effective dose to patients undergoing common X-ray examination.
T1  - Patient dosimetry in diagnostic radiology and dose measurement I practice - A pilot survey
SP  - 317
EP  - 320
UR  - https://hdl.handle.net/21.15107/rcub_vinar_6399
ER  - 

@conference{
author = "Ciraj-Bjelac, Olivera and Košutić, Duško D. and Marković, S.",
year = "2002",
abstract = "The estimation of doses received by patients undergoing radiological examinations is presented. The results are presented, in terms of entrance surface doses (ESD) and effective dose to patients undergoing common X-ray examination.",
title = "Patient dosimetry in diagnostic radiology and dose measurement I practice - A pilot survey",
pages = "317-320",
url = "https://hdl.handle.net/21.15107/rcub_vinar_6399"
}

Ciraj-Bjelac, O., Košutić, D. D.,& Marković, S.. (2002). Patient dosimetry in diagnostic radiology and dose measurement I practice - A pilot survey. , 317-320.
https://hdl.handle.net/21.15107/rcub_vinar_6399

Ciraj-Bjelac O, Košutić DD, Marković S. Patient dosimetry in diagnostic radiology and dose measurement I practice - A pilot survey. 2002;:317-320.
https://hdl.handle.net/21.15107/rcub_vinar_6399 .

Ciraj-Bjelac, Olivera, Košutić, Duško D., Marković, S., "Patient dosimetry in diagnostic radiology and dose measurement I practice - A pilot survey" (2002):317-320,
https://hdl.handle.net/21.15107/rcub_vinar_6399 .