TY  - JOUR
AU  - Matović, Branko
AU  - Maletaškić, Jelena
AU  - Maksimović, Vesna
AU  - Dimitrijević, Stevan P.
AU  - Todorović, Bratislav
AU  - Pejić, Milan
AU  - Zagorac, Dejan
AU  - Zagorac, Jelena B.
AU  - Zeng, Yu-Ping
AU  - Cvijović-Alagić, Ivana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/10697
AB  - Multicomponent oxide with pyrochlore structure (A2B2O7), containing 7 different A-site cations and 3 B-site cations in equiatomic amounts, was synthesized. Powders with nominal composition (La1/7Sm1/7Nd1/7Pr1/7Y1/7Gd1/7Yb1/7)2(Sn1/3Hf1/3Zr1/3)2O7 were fabricated through a reaction of metal nitrates (A-site) and metal chlorides (B-site) with sodium hydroxide during the solid state displacement reaction. Room temperature synthesis initially resulted in the obtainment of amorphous powders, which crystallized after subsequent calcination to form single crystalline compounds. Crystalline high-entropy ceramic powders formation took place at temperatures as low as 750 °C. During calcination, defective fluorite (F-A2B2O7) and crystal pyrochlore (Py-A2B2O7) structures coexist. A large number of cations induce the obtainment of stable high-entropy pyrochlores. Results showed that sintering at 1650 °C lead to pure crystalline single-phase pyrochlore formation. High-density ceramic, free of additives, was obtained after powders were compacted and subjected to pressureless sintering at 1650 °C. Multicomponent pyrochlore structure was investigated using the theoretical and experimental multi-methodological approach.
T2  - Boletin de la Sociedad Espanola de Ceramica y Vidrio
T1  - Multicomponent solid solution with pyrochlore structure
T1  - Solución sólida multicomponente con estructura de pirocloro
VL  - 62
IS  - 6
SP  - 515
EP  - 526
DO  - 10.1016/j.bsecv.2023.01.005
ER  - 

@article{
author = "Matović, Branko and Maletaškić, Jelena and Maksimović, Vesna and Dimitrijević, Stevan P. and Todorović, Bratislav and Pejić, Milan and Zagorac, Dejan and Zagorac, Jelena B. and Zeng, Yu-Ping and Cvijović-Alagić, Ivana",
year = "2023",
abstract = "Multicomponent oxide with pyrochlore structure (A2B2O7), containing 7 different A-site cations and 3 B-site cations in equiatomic amounts, was synthesized. Powders with nominal composition (La1/7Sm1/7Nd1/7Pr1/7Y1/7Gd1/7Yb1/7)2(Sn1/3Hf1/3Zr1/3)2O7 were fabricated through a reaction of metal nitrates (A-site) and metal chlorides (B-site) with sodium hydroxide during the solid state displacement reaction. Room temperature synthesis initially resulted in the obtainment of amorphous powders, which crystallized after subsequent calcination to form single crystalline compounds. Crystalline high-entropy ceramic powders formation took place at temperatures as low as 750 °C. During calcination, defective fluorite (F-A2B2O7) and crystal pyrochlore (Py-A2B2O7) structures coexist. A large number of cations induce the obtainment of stable high-entropy pyrochlores. Results showed that sintering at 1650 °C lead to pure crystalline single-phase pyrochlore formation. High-density ceramic, free of additives, was obtained after powders were compacted and subjected to pressureless sintering at 1650 °C. Multicomponent pyrochlore structure was investigated using the theoretical and experimental multi-methodological approach.",
journal = "Boletin de la Sociedad Espanola de Ceramica y Vidrio",
title = "Multicomponent solid solution with pyrochlore structure, Solución sólida multicomponente con estructura de pirocloro",
volume = "62",
number = "6",
pages = "515-526",
doi = "10.1016/j.bsecv.2023.01.005"
}

Matović, B., Maletaškić, J., Maksimović, V., Dimitrijević, S. P., Todorović, B., Pejić, M., Zagorac, D., Zagorac, J. B., Zeng, Y.,& Cvijović-Alagić, I.. (2023). Multicomponent solid solution with pyrochlore structure. in Boletin de la Sociedad Espanola de Ceramica y Vidrio, 62(6), 515-526.
https://doi.org/10.1016/j.bsecv.2023.01.005

Matović B, Maletaškić J, Maksimović V, Dimitrijević SP, Todorović B, Pejić M, Zagorac D, Zagorac JB, Zeng Y, Cvijović-Alagić I. Multicomponent solid solution with pyrochlore structure. in Boletin de la Sociedad Espanola de Ceramica y Vidrio. 2023;62(6):515-526.
doi:10.1016/j.bsecv.2023.01.005 .

Matović, Branko, Maletaškić, Jelena, Maksimović, Vesna, Dimitrijević, Stevan P., Todorović, Bratislav, Pejić, Milan, Zagorac, Dejan, Zagorac, Jelena B., Zeng, Yu-Ping, Cvijović-Alagić, Ivana, "Multicomponent solid solution with pyrochlore structure" in Boletin de la Sociedad Espanola de Ceramica y Vidrio, 62, no. 6 (2023):515-526,
https://doi.org/10.1016/j.bsecv.2023.01.005 . .

TY  - JOUR
AU  - Matović, Branko
AU  - Maletaškić, Jelena
AU  - Maksimović, Vesna
AU  - Dimitrijević, Silvana
AU  - Todorović, Bratislav
AU  - Zagorac, Jelena
AU  - Luković, Aleksa
AU  - Zeng, Yu-Ping
AU  - Cvijović-Alagić, Ivana
PY  - 2023
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/11350
AB  - Single nano high-entropy pyrochlore-type compound (A2B2O7) with 7 different
rare-earth cations at site A and 3 different metal cations at site B with equiatomic
amounts (7A1/7)2(3B1/3)2O7 is successfully obtained. The powder with nominal
composition (La1/7Sm1/7Nd1/7Pr1/7Y1/7Gd1/7Yb1/7)2(Sn1/3Hf1/3Zr1/3)2O7 was fabricated by
reacting metal nitrates (site A) and metal chlorides (site B) with glycine during the
combustion reaction. The XRD analysis revealed that the powder attained during
synthesis is in an amorphous state. To induce crystallization of the obtained pyrochlore structure, the post-calcination process at 600-1500 °C was conducted and studied.
Results of this study showed that the monophase pyrochlore (A2B2O7) structure is
obtained during the calcination at 900 °C. The high-density ceramic pellet with 97% of
theoretical density and free of any additives was obtained through pressureless sintering
at 1650 °C for 4 h in the air using the powder calcined at 900 °C.
T2  - Science of Sintering
T1  - Synthesis and characterization of high-entropy A2B2O7 pyrochlore with multiple elements at A and B sites
IS  - InPress
SP  - 23
DO  - 10.2298/SOS220802023M
ER  - 

@article{
author = "Matović, Branko and Maletaškić, Jelena and Maksimović, Vesna and Dimitrijević, Silvana and Todorović, Bratislav and Zagorac, Jelena and Luković, Aleksa and Zeng, Yu-Ping and Cvijović-Alagić, Ivana",
year = "2023",
abstract = "Single nano high-entropy pyrochlore-type compound (A2B2O7) with 7 different
rare-earth cations at site A and 3 different metal cations at site B with equiatomic
amounts (7A1/7)2(3B1/3)2O7 is successfully obtained. The powder with nominal
composition (La1/7Sm1/7Nd1/7Pr1/7Y1/7Gd1/7Yb1/7)2(Sn1/3Hf1/3Zr1/3)2O7 was fabricated by
reacting metal nitrates (site A) and metal chlorides (site B) with glycine during the
combustion reaction. The XRD analysis revealed that the powder attained during
synthesis is in an amorphous state. To induce crystallization of the obtained pyrochlore structure, the post-calcination process at 600-1500 °C was conducted and studied.
Results of this study showed that the monophase pyrochlore (A2B2O7) structure is
obtained during the calcination at 900 °C. The high-density ceramic pellet with 97% of
theoretical density and free of any additives was obtained through pressureless sintering
at 1650 °C for 4 h in the air using the powder calcined at 900 °C.",
journal = "Science of Sintering",
title = "Synthesis and characterization of high-entropy A2B2O7 pyrochlore with multiple elements at A and B sites",
number = "InPress",
pages = "23",
doi = "10.2298/SOS220802023M"
}

Matović, B., Maletaškić, J., Maksimović, V., Dimitrijević, S., Todorović, B., Zagorac, J., Luković, A., Zeng, Y.,& Cvijović-Alagić, I.. (2023). Synthesis and characterization of high-entropy A2B2O7 pyrochlore with multiple elements at A and B sites. in Science of Sintering(InPress), 23.
https://doi.org/10.2298/SOS220802023M

Matović B, Maletaškić J, Maksimović V, Dimitrijević S, Todorović B, Zagorac J, Luković A, Zeng Y, Cvijović-Alagić I. Synthesis and characterization of high-entropy A2B2O7 pyrochlore with multiple elements at A and B sites. in Science of Sintering. 2023;(InPress):23.
doi:10.2298/SOS220802023M .

Matović, Branko, Maletaškić, Jelena, Maksimović, Vesna, Dimitrijević, Silvana, Todorović, Bratislav, Zagorac, Jelena, Luković, Aleksa, Zeng, Yu-Ping, Cvijović-Alagić, Ivana, "Synthesis and characterization of high-entropy A2B2O7 pyrochlore with multiple elements at A and B sites" in Science of Sintering, no. InPress (2023):23,
https://doi.org/10.2298/SOS220802023M . .

TY  - JOUR
AU  - Nenadović, Miloš
AU  - Ferone, Claudio
AU  - Kljajević, Ljiljana M.
AU  - Mirković, Miljana M.
AU  - Todorović, Bratislav 
AU  - Vukanac, Ivana
AU  - Nenadović, Snežana S.
PY  - 2021
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/9950
AB  - Presented study deals with the final structure and radiological properties of different fly-ash based geopolymers. Lignite fly-ash (lignite Kolubara – Serbia) and wood fly ash were obtained in combustion process together with commercial fly-ash. Synthesis of the geopolymers was conducted by mixing fly-ash, sodium silicate solution, NaOH and water. The samples were strengthened 60 °C for 48 hours after staying at room temperature in covering mold for 24 hours. The X-ray diffraction, Fourier transform infrared and SAM measurements were conducted on the samples after 28 days of geopolymerization process. The X-ray diffraction measurements of lignite fly-ash samples show anhydrite as the main constituent, while wood fly-ash samples consist of calcite, albite and gypsum minerals. Besides determination of physicochemical properties, the aim of this study was radiological characterization of lignite fly-ash, wood fly-ash and the obtained geopolymer products. Activity concentration of 40K and radionuclides from the 238U and 232Th decay series, in ash samples and fly-ash based geopolymers, were determined by means of gamma-ray spectrometry, and the absorbed dose rate, D, and the annual effective dose rate, E, were calculated in accordance with the UNSCEAR 2000 report.
T2  - Nuclear Technology and Radiation Protection
T1  - Alkali activation of different type of ash as a production of combustion process
VL  - 36
IS  - 1
SP  - 66
EP  - 73
DO  - 10.2298/NTRP201120006N
ER  - 

@article{
author = "Nenadović, Miloš and Ferone, Claudio and Kljajević, Ljiljana M. and Mirković, Miljana M. and Todorović, Bratislav  and Vukanac, Ivana and Nenadović, Snežana S.",
year = "2021",
abstract = "Presented study deals with the final structure and radiological properties of different fly-ash based geopolymers. Lignite fly-ash (lignite Kolubara – Serbia) and wood fly ash were obtained in combustion process together with commercial fly-ash. Synthesis of the geopolymers was conducted by mixing fly-ash, sodium silicate solution, NaOH and water. The samples were strengthened 60 °C for 48 hours after staying at room temperature in covering mold for 24 hours. The X-ray diffraction, Fourier transform infrared and SAM measurements were conducted on the samples after 28 days of geopolymerization process. The X-ray diffraction measurements of lignite fly-ash samples show anhydrite as the main constituent, while wood fly-ash samples consist of calcite, albite and gypsum minerals. Besides determination of physicochemical properties, the aim of this study was radiological characterization of lignite fly-ash, wood fly-ash and the obtained geopolymer products. Activity concentration of 40K and radionuclides from the 238U and 232Th decay series, in ash samples and fly-ash based geopolymers, were determined by means of gamma-ray spectrometry, and the absorbed dose rate, D, and the annual effective dose rate, E, were calculated in accordance with the UNSCEAR 2000 report.",
journal = "Nuclear Technology and Radiation Protection",
title = "Alkali activation of different type of ash as a production of combustion process",
volume = "36",
number = "1",
pages = "66-73",
doi = "10.2298/NTRP201120006N"
}

Nenadović, M., Ferone, C., Kljajević, L. M., Mirković, M. M., Todorović, B., Vukanac, I.,& Nenadović, S. S.. (2021). Alkali activation of different type of ash as a production of combustion process. in Nuclear Technology and Radiation Protection, 36(1), 66-73.
https://doi.org/10.2298/NTRP201120006N

Nenadović M, Ferone C, Kljajević LM, Mirković MM, Todorović B, Vukanac I, Nenadović SS. Alkali activation of different type of ash as a production of combustion process. in Nuclear Technology and Radiation Protection. 2021;36(1):66-73.
doi:10.2298/NTRP201120006N .

Nenadović, Miloš, Ferone, Claudio, Kljajević, Ljiljana M., Mirković, Miljana M., Todorović, Bratislav , Vukanac, Ivana, Nenadović, Snežana S., "Alkali activation of different type of ash as a production of combustion process" in Nuclear Technology and Radiation Protection, 36, no. 1 (2021):66-73,
https://doi.org/10.2298/NTRP201120006N . .