TY  - JOUR
AU  - Terzić, Anja
AU  - Radojević, Zagorka
AU  - Pavlović, Ljubica
AU  - Pavlović, Vladimir
AU  - Mitić, Vojislav
PY  - 2015
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/3770
AB  - In this study, the feasibility of using fly ash to manufacture high-temperature mortars was investigated. The investigation was set to define preliminary characteristics of new types of mortars based on ordinary and/or refractory cement with fly ash addition, and to establish mutual correlation between thermally induced changes of mineral phases, microstructure, and final performances of the mortars. New mortars, made up of 21% cement (PC-CEM I 42.5R/HAC-Secar 70/71), 70% river sand, and 9% fly ash, were chemically, physically, and mechanically characterized to determine possibilities of fly ash re-utilization for high-temperature purposes. The fly ash samples, which originated from four different power plants, were mechanically activated. Mortars were heat-treated up to 1300 degrees C in a laboratory tunnel furnace with retention time 2 h. Thermal stability of crystalline phases were studied by differential thermal analysis (DTA); thermally induced changes in mineral phase composition were analyzed by XRD; and microstructure were investigated by scanning electron microscopy. Correlated results of DTA, XRD, and SEM analyses indicated initiation of sintering processes at approximately 1300 degrees C and formation of thermally stable minerals (rankinite, gehlenite, anorthite, cristobalite). The investigation highlights a sustainable approach of using fly ash in developing ecofriendly mortars for high-temperature application.
PB  - Wiley, Hoboken
T2  - International Journal of Applied Ceramic Technology
T1  - Novel Utilization of Fly Ash for High-Temperature Mortars: Phase Composition, Microstructure and Performances Correlation
EP  - 146
IS  - 1
SP  - 133
VL  - 12
DO  - 10.1111/ijac.12135
ER  - 

@article{
author = "Terzić, Anja and Radojević, Zagorka and Pavlović, Ljubica and Pavlović, Vladimir and Mitić, Vojislav",
year = "2015",
abstract = "In this study, the feasibility of using fly ash to manufacture high-temperature mortars was investigated. The investigation was set to define preliminary characteristics of new types of mortars based on ordinary and/or refractory cement with fly ash addition, and to establish mutual correlation between thermally induced changes of mineral phases, microstructure, and final performances of the mortars. New mortars, made up of 21% cement (PC-CEM I 42.5R/HAC-Secar 70/71), 70% river sand, and 9% fly ash, were chemically, physically, and mechanically characterized to determine possibilities of fly ash re-utilization for high-temperature purposes. The fly ash samples, which originated from four different power plants, were mechanically activated. Mortars were heat-treated up to 1300 degrees C in a laboratory tunnel furnace with retention time 2 h. Thermal stability of crystalline phases were studied by differential thermal analysis (DTA); thermally induced changes in mineral phase composition were analyzed by XRD; and microstructure were investigated by scanning electron microscopy. Correlated results of DTA, XRD, and SEM analyses indicated initiation of sintering processes at approximately 1300 degrees C and formation of thermally stable minerals (rankinite, gehlenite, anorthite, cristobalite). The investigation highlights a sustainable approach of using fly ash in developing ecofriendly mortars for high-temperature application.",
publisher = "Wiley, Hoboken",
journal = "International Journal of Applied Ceramic Technology",
title = "Novel Utilization of Fly Ash for High-Temperature Mortars: Phase Composition, Microstructure and Performances Correlation",
pages = "146-133",
number = "1",
volume = "12",
doi = "10.1111/ijac.12135"
}

Terzić, A., Radojević, Z., Pavlović, L., Pavlović, V.,& Mitić, V.. (2015). Novel Utilization of Fly Ash for High-Temperature Mortars: Phase Composition, Microstructure and Performances Correlation. in International Journal of Applied Ceramic Technology
Wiley, Hoboken., 12(1), 133-146.
https://doi.org/10.1111/ijac.12135

Terzić A, Radojević Z, Pavlović L, Pavlović V, Mitić V. Novel Utilization of Fly Ash for High-Temperature Mortars: Phase Composition, Microstructure and Performances Correlation. in International Journal of Applied Ceramic Technology. 2015;12(1):133-146.
doi:10.1111/ijac.12135 .

Terzić, Anja, Radojević, Zagorka, Pavlović, Ljubica, Pavlović, Vladimir, Mitić, Vojislav, "Novel Utilization of Fly Ash for High-Temperature Mortars: Phase Composition, Microstructure and Performances Correlation" in International Journal of Applied Ceramic Technology, 12, no. 1 (2015):133-146,
https://doi.org/10.1111/ijac.12135 . .

TY  - JOUR
AU  - Paunović, Vesna
AU  - Mitić, Vojislav
AU  - Pavlović, Vladimir
AU  - Miljković, Miroslav
AU  - Živković, Ljiljana
PY  - 2010
UR  - http://aspace.agrif.bg.ac.rs/handle/123456789/2350
AB  - La/Mn codoped BaTiO3 with different La2O3 content, ranging from 0.1 to 5.0 at% La, was investigated regarding their microstructural and dielectric characteristics. The content of 0.05 at% Mn was constant in all investigated samples. The samples were sintered at 1320°C and 1350°C for two hours. Microstructural studies were done using SEM and EDS analysis. The fine-grained microstructure was obtained even for low content of La. The appearance of secondary abnormal grains with serrated features along grain boundaries was observed in 1.0 at% La-BaTiO3 sintered at 1350°C. Nearly flat permittivity-temperature response was obtained in specimens with 2.0 and 5.0 at% La. Using the modified Curie-Weiss law a critical exponent γ and C' were calculated. The obtained values of γ pointed out the diffuse phase transformation in heavily doped BaTiO3 and great departure from the Curie-Weiss law for low doped ceramics.
PB  - Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad
T2  - Processing and Application of Ceramics
T1  - Microstructure evolution and phase transition in La/Mn doped barium titanate ceramics
EP  - 258
IS  - 4
SP  - 253
VL  - 4
UR  - https://hdl.handle.net/21.15107/rcub_agrospace_2350
ER  - 

@article{
author = "Paunović, Vesna and Mitić, Vojislav and Pavlović, Vladimir and Miljković, Miroslav and Živković, Ljiljana",
year = "2010",
abstract = "La/Mn codoped BaTiO3 with different La2O3 content, ranging from 0.1 to 5.0 at% La, was investigated regarding their microstructural and dielectric characteristics. The content of 0.05 at% Mn was constant in all investigated samples. The samples were sintered at 1320°C and 1350°C for two hours. Microstructural studies were done using SEM and EDS analysis. The fine-grained microstructure was obtained even for low content of La. The appearance of secondary abnormal grains with serrated features along grain boundaries was observed in 1.0 at% La-BaTiO3 sintered at 1350°C. Nearly flat permittivity-temperature response was obtained in specimens with 2.0 and 5.0 at% La. Using the modified Curie-Weiss law a critical exponent γ and C' were calculated. The obtained values of γ pointed out the diffuse phase transformation in heavily doped BaTiO3 and great departure from the Curie-Weiss law for low doped ceramics.",
publisher = "Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad",
journal = "Processing and Application of Ceramics",
title = "Microstructure evolution and phase transition in La/Mn doped barium titanate ceramics",
pages = "258-253",
number = "4",
volume = "4",
url = "https://hdl.handle.net/21.15107/rcub_agrospace_2350"
}

Paunović, V., Mitić, V., Pavlović, V., Miljković, M.,& Živković, L.. (2010). Microstructure evolution and phase transition in La/Mn doped barium titanate ceramics. in Processing and Application of Ceramics
Univerzitet u Novom Sadu - Tehnološki fakultet, Novi Sad., 4(4), 253-258.
https://hdl.handle.net/21.15107/rcub_agrospace_2350

Paunović V, Mitić V, Pavlović V, Miljković M, Živković L. Microstructure evolution and phase transition in La/Mn doped barium titanate ceramics. in Processing and Application of Ceramics. 2010;4(4):253-258.
https://hdl.handle.net/21.15107/rcub_agrospace_2350 .

Paunović, Vesna, Mitić, Vojislav, Pavlović, Vladimir, Miljković, Miroslav, Živković, Ljiljana, "Microstructure evolution and phase transition in La/Mn doped barium titanate ceramics" in Processing and Application of Ceramics, 4, no. 4 (2010):253-258,
https://hdl.handle.net/21.15107/rcub_agrospace_2350 .