TY  - JOUR
AU  - Šaponjić, Aleksandra
AU  - Matović, Branko
AU  - Babić, Biljana M.
AU  - Zagorac, Jelena B.
AU  - Poharc-Logar, V.
AU  - Logar, Mihovil
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4174
AB  - A carbothermal reduction and nitridation process (CRN) was employed to prepare Si3N4-SiC nanocomposite powder [1-4]. Diatomaceous earth from Serbian deposite was used as Si precursor in the synthesis of nanocomposite powder by mixing with commercial sugar as reduscing agent. Purified diatomaceous earth with pre-determined C/SiO2 ratio of 5 yuilded Si3N4-SiC nanocomposite powder. The XRD (Rietveld analysis) was employed to evaluate Si3N4/SiC ratio of the obtained powder after CRN. Also IR and SEM analysis were used to determine morphology and chemical composistion. The results show that the optimally temperature was 1450 degrees C, which is wery low, compared to the classical synthesis process.
T2  - Optoelectronics and Advanced Materials - Rapid Communications
T1  - Cost-effective synthesis of Si3N4-SiC nanocomposite powder
VL  - 4
IS  - 11
SP  - 1681
EP  - 1684
UR  - https://hdl.handle.net/21.15107/rcub_vinar_4174
ER  - 

@article{
author = "Šaponjić, Aleksandra and Matović, Branko and Babić, Biljana M. and Zagorac, Jelena B. and Poharc-Logar, V. and Logar, Mihovil",
year = "2010",
abstract = "A carbothermal reduction and nitridation process (CRN) was employed to prepare Si3N4-SiC nanocomposite powder [1-4]. Diatomaceous earth from Serbian deposite was used as Si precursor in the synthesis of nanocomposite powder by mixing with commercial sugar as reduscing agent. Purified diatomaceous earth with pre-determined C/SiO2 ratio of 5 yuilded Si3N4-SiC nanocomposite powder. The XRD (Rietveld analysis) was employed to evaluate Si3N4/SiC ratio of the obtained powder after CRN. Also IR and SEM analysis were used to determine morphology and chemical composistion. The results show that the optimally temperature was 1450 degrees C, which is wery low, compared to the classical synthesis process.",
journal = "Optoelectronics and Advanced Materials - Rapid Communications",
title = "Cost-effective synthesis of Si3N4-SiC nanocomposite powder",
volume = "4",
number = "11",
pages = "1681-1684",
url = "https://hdl.handle.net/21.15107/rcub_vinar_4174"
}

Šaponjić, A., Matović, B., Babić, B. M., Zagorac, J. B., Poharc-Logar, V.,& Logar, M.. (2010). Cost-effective synthesis of Si3N4-SiC nanocomposite powder. in Optoelectronics and Advanced Materials - Rapid Communications, 4(11), 1681-1684.
https://hdl.handle.net/21.15107/rcub_vinar_4174

Šaponjić A, Matović B, Babić BM, Zagorac JB, Poharc-Logar V, Logar M. Cost-effective synthesis of Si3N4-SiC nanocomposite powder. in Optoelectronics and Advanced Materials - Rapid Communications. 2010;4(11):1681-1684.
https://hdl.handle.net/21.15107/rcub_vinar_4174 .

Šaponjić, Aleksandra, Matović, Branko, Babić, Biljana M., Zagorac, Jelena B., Poharc-Logar, V., Logar, Mihovil, "Cost-effective synthesis of Si3N4-SiC nanocomposite powder" in Optoelectronics and Advanced Materials - Rapid Communications, 4, no. 11 (2010):1681-1684,
https://hdl.handle.net/21.15107/rcub_vinar_4174 .

TY  - JOUR
AU  - Cocic, M.
AU  - Logar, Mihovil
AU  - Matović, Branko
AU  - Poharc-Logar, V.
PY  - 2010
UR  - https://vinar.vin.bg.ac.rs/handle/123456789/4284
AB  - The possibility to obtain glass-ceramics from basalt from the locality on Vrelo (Kopaonik mt.) is shown in this paper. The parent rock was ground to fraction -0.4 +0.1 mm, and then melted at 1250 - 1300 degrees C. The crystallization melted bazaltic glass at 950 degrees C during the time interval of 3 hours caused synthesis of a glass-ceramic material with a microstructure that has excellent mechanical properties according to the determined dynamic modulus of elasticity and uniaxial compresive strength. The phase composition of. the obtained glass ceramic material was determined by XRPD using Rietveld refinement and SEM. Two phases were found: pyroxene which corresponds to omphacite of the composition (Na(0.199) K(0.180) Ca(0.471) Mg(0.249))(1.1)(Mg(0.271)Fe(0.299)Al(0.430))(1.0)(Si(1.704)Ti(0.046)Al(0.250))(2.0)O(6) and glass with on approximate relationship 69:31.
T2  - Science of Sintering
T1  - Glass-Ceramics Obtained by the Crystallization of Basalt
VL  - 42
IS  - 3
SP  - 383
EP  - 388
DO  - 10.2298/SOS1003383C
ER  - 

@article{
author = "Cocic, M. and Logar, Mihovil and Matović, Branko and Poharc-Logar, V.",
year = "2010",
abstract = "The possibility to obtain glass-ceramics from basalt from the locality on Vrelo (Kopaonik mt.) is shown in this paper. The parent rock was ground to fraction -0.4 +0.1 mm, and then melted at 1250 - 1300 degrees C. The crystallization melted bazaltic glass at 950 degrees C during the time interval of 3 hours caused synthesis of a glass-ceramic material with a microstructure that has excellent mechanical properties according to the determined dynamic modulus of elasticity and uniaxial compresive strength. The phase composition of. the obtained glass ceramic material was determined by XRPD using Rietveld refinement and SEM. Two phases were found: pyroxene which corresponds to omphacite of the composition (Na(0.199) K(0.180) Ca(0.471) Mg(0.249))(1.1)(Mg(0.271)Fe(0.299)Al(0.430))(1.0)(Si(1.704)Ti(0.046)Al(0.250))(2.0)O(6) and glass with on approximate relationship 69:31.",
journal = "Science of Sintering",
title = "Glass-Ceramics Obtained by the Crystallization of Basalt",
volume = "42",
number = "3",
pages = "383-388",
doi = "10.2298/SOS1003383C"
}

Cocic, M., Logar, M., Matović, B.,& Poharc-Logar, V.. (2010). Glass-Ceramics Obtained by the Crystallization of Basalt. in Science of Sintering, 42(3), 383-388.
https://doi.org/10.2298/SOS1003383C

Cocic M, Logar M, Matović B, Poharc-Logar V. Glass-Ceramics Obtained by the Crystallization of Basalt. in Science of Sintering. 2010;42(3):383-388.
doi:10.2298/SOS1003383C .

Cocic, M., Logar, Mihovil, Matović, Branko, Poharc-Logar, V., "Glass-Ceramics Obtained by the Crystallization of Basalt" in Science of Sintering, 42, no. 3 (2010):383-388,
https://doi.org/10.2298/SOS1003383C . .