Radojević, Zagorka

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  • Radojević, Zagorka (2)
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Application of pyrophyllite in high-temperature treated building materials

Terzić, Anja; Vasić (prev. Arsenović), Milica; Stojanović, Jovica; Pavlović, Vladimir; Radojević, Zagorka

(Beograd : Međunarodni Institut za nauku o sinterovanju, 2023)

TY  - JOUR
AU  - Terzić, Anja
AU  - Vasić (prev. Arsenović), Milica
AU  - Stojanović, Jovica
AU  - Pavlović, Vladimir
AU  - Radojević, Zagorka
PY  - 2023
UR  - https://ritnms.itnms.ac.rs/handle/123456789/676
AB  - Phyllosilicate mineral pyrophyllite is predominantly used in the ceramic industry because it exhibits high refractoriness. Due to its thermal transformation into mullite, pyrophyllite is stable at elevated temperatures, making it a suitable mineral additive for refractory non-shaped materials and various ceramic shaped products. In this study, pyrophyllite is employed as 50 % clay replacement in the ceramics and up to 30 % cement replacement in mortars. Physico-mechanical properties were investigated. The firing shrinkage in the ceramics treated at 1200 °C was reduced by pyrophyllite addition. Pyrophyllite acted as additional pozzolana during cement hydration. Within the microstructure, it formed micro-reinforcement in the shape of crystalline folia, which improves the mechanical properties of ordinary Portland cement, high aluminate cement, and blended cement mortars. The investigation proved the efficiency and suitability of pyrophyllite employed as a substitution for clay in ceramics and a cement replacement in mortars.















Phyllosilicate mineral pyrophyllite is predominantly used in the ceramic industry because it exhibits high refractoriness. Due to its thermal transformation into mullite, pyrophyllite is stable at elevated temperatures, making it a suitable mineral additive for refractory non-shaped materials and various ceramic shaped products. In this study, pyrophyllite is employed as 50 % clay replacement in the ceramics and up to 30 % cement replacement in mortars. Physico-mechanical properties were investigated. The firing shrinkage in the ceramics treated at 1200 °C was reduced by pyrophyllite addition. Pyrophyllite acted as additional pozzolana during cement hydration. Within the microstructure, it formed micro-reinforcement in the shape of crystalline folia, which improves the mechanical properties of ordinary Portland cement, high aluminate cement, and blended cement mortars. The investigation proved the efficiency and suitability of pyrophyllite employed as a substitution for clay in ceramics and a cement replacement in mortars.
AB  - Филосиликатни минерал пирофилит се претежно користи у керамичкој индустрији јер показује високу ватросталност. Због своје термичке трансформације у мулит, пирофилит је стабилан на повишеним температурама, што га чини погодним минералним додатком за ватросталне необликоване материјале и различите керамичке обликоване производе. У овом раду пирофилит је коришћен као замена за 50 % глине у керамици и до 30 % замене за цемент у малтерима. Испитивана су физичко-механичка својства. Скупљање при печењу у керамици третираној на 1200 °C смањено је додавањем пирофилита. Пирофилит се понашао као додатни извор поцоланског материјала током хидратације цемента. Унутар микроструктуре формирао је микроарматуру у облику кристалне фолије, што је побољшало механичка својства малтера на бази обичног Портланд цемента, високоалуминатног цемента и мешаних цемента. Истраживањем је доказана ефикасност и погодност пирофилита који се користи као замена за глину у керамици и замена за цемент у малтерима.
PB  - Beograd : Međunarodni Institut za nauku o sinterovanju
T2  - Science of Sintering
T1  - Application of pyrophyllite in high-temperature treated building materials
EP  - 16
IS  - 3
SP  - 1
VL  - 55
DO  - 10.2298/SOS220610014T
ER  - 
@article{
author = "Terzić, Anja and Vasić (prev. Arsenović), Milica and Stojanović, Jovica and Pavlović, Vladimir and Radojević, Zagorka",
year = "2023",
abstract = "Phyllosilicate mineral pyrophyllite is predominantly used in the ceramic industry because it exhibits high refractoriness. Due to its thermal transformation into mullite, pyrophyllite is stable at elevated temperatures, making it a suitable mineral additive for refractory non-shaped materials and various ceramic shaped products. In this study, pyrophyllite is employed as 50 % clay replacement in the ceramics and up to 30 % cement replacement in mortars. Physico-mechanical properties were investigated. The firing shrinkage in the ceramics treated at 1200 °C was reduced by pyrophyllite addition. Pyrophyllite acted as additional pozzolana during cement hydration. Within the microstructure, it formed micro-reinforcement in the shape of crystalline folia, which improves the mechanical properties of ordinary Portland cement, high aluminate cement, and blended cement mortars. The investigation proved the efficiency and suitability of pyrophyllite employed as a substitution for clay in ceramics and a cement replacement in mortars.















Phyllosilicate mineral pyrophyllite is predominantly used in the ceramic industry because it exhibits high refractoriness. Due to its thermal transformation into mullite, pyrophyllite is stable at elevated temperatures, making it a suitable mineral additive for refractory non-shaped materials and various ceramic shaped products. In this study, pyrophyllite is employed as 50 % clay replacement in the ceramics and up to 30 % cement replacement in mortars. Physico-mechanical properties were investigated. The firing shrinkage in the ceramics treated at 1200 °C was reduced by pyrophyllite addition. Pyrophyllite acted as additional pozzolana during cement hydration. Within the microstructure, it formed micro-reinforcement in the shape of crystalline folia, which improves the mechanical properties of ordinary Portland cement, high aluminate cement, and blended cement mortars. The investigation proved the efficiency and suitability of pyrophyllite employed as a substitution for clay in ceramics and a cement replacement in mortars., Филосиликатни минерал пирофилит се претежно користи у керамичкој индустрији јер показује високу ватросталност. Због своје термичке трансформације у мулит, пирофилит је стабилан на повишеним температурама, што га чини погодним минералним додатком за ватросталне необликоване материјале и различите керамичке обликоване производе. У овом раду пирофилит је коришћен као замена за 50 % глине у керамици и до 30 % замене за цемент у малтерима. Испитивана су физичко-механичка својства. Скупљање при печењу у керамици третираној на 1200 °C смањено је додавањем пирофилита. Пирофилит се понашао као додатни извор поцоланског материјала током хидратације цемента. Унутар микроструктуре формирао је микроарматуру у облику кристалне фолије, што је побољшало механичка својства малтера на бази обичног Портланд цемента, високоалуминатног цемента и мешаних цемента. Истраживањем је доказана ефикасност и погодност пирофилита који се користи као замена за глину у керамици и замена за цемент у малтерима.",
publisher = "Beograd : Međunarodni Institut za nauku o sinterovanju",
journal = "Science of Sintering",
title = "Application of pyrophyllite in high-temperature treated building materials",
pages = "16-1",
number = "3",
volume = "55",
doi = "10.2298/SOS220610014T"
}
Terzić, A., Vasić (prev. Arsenović), M., Stojanović, J., Pavlović, V.,& Radojević, Z.. (2023). Application of pyrophyllite in high-temperature treated building materials. in Science of Sintering
Beograd : Međunarodni Institut za nauku o sinterovanju., 55(3), 1-16.
https://doi.org/10.2298/SOS220610014T
Terzić A, Vasić (prev. Arsenović) M, Stojanović J, Pavlović V, Radojević Z. Application of pyrophyllite in high-temperature treated building materials. in Science of Sintering. 2023;55(3):1-16.
doi:10.2298/SOS220610014T .
Terzić, Anja, Vasić (prev. Arsenović), Milica, Stojanović, Jovica, Pavlović, Vladimir, Radojević, Zagorka, "Application of pyrophyllite in high-temperature treated building materials" in Science of Sintering, 55, no. 3 (2023):1-16,
https://doi.org/10.2298/SOS220610014T . .

Characterization of microstructural and thermal properties of the steatite powders applied as fillers in the ceramic coatings

Terzić, Anja; Andrić, Ljubiša; Radojević, Zagorka; Radulović, Dragan; Miličić, Ljiljana; Mijatović, Nevenka

(Belgrade . Serbian ceramic society and Institute of technical sciences of SASA), 2016)

TY  - CONF
AU  - Terzić, Anja
AU  - Andrić, Ljubiša
AU  - Radojević, Zagorka
AU  - Radulović, Dragan
AU  - Miličić, Ljiljana
AU  - Mijatović, Nevenka
PY  - 2016
UR  - https://ritnms.itnms.ac.rs/handle/123456789/1032
AB  - Steatite is a magnesium silicate multi-componential composite that can be synthesized from natural raw materials, and eventually produced via standard ceramic processing methods and readily machined or sintered into a variety of forms. Due to its excellent electrical properties, high mechanical resistance, low dielectric loss and high temperature resistance, steatite is widely utilized as a material for thermal insulation and heath protection. The raw materials used in steatite powder synthesis are: talc mixture for calcination, clay minerals as bonding agent, and feldspar or BaCO3 as melting agents. The synthesis is usually conducted at approximately 1400°C, and its product is a crystalline phase of magnesium metasilicate (MgSiO3 ) obtained from talc, while melting agent forms a vitreous phase which melts and surrounds the crystalline phase. Steatite ceramics’ fillers were fabricated via combined method of high-energy ball milling, cold pressing and sintering. The powder blends containing same amounts of components in all 4 mixtures were dry-pulverized for 30 min a laboratory mill, with ceramic vial and ceramic balls. After milling, the powders were compacted to cylindrical tablets with a diameter of 25 mm by uniaxial compression at 4 tons/cm2 . The green compacts were sintered at 1000-1400°C (10°C/min) for 2 h in an air atmosphere. The effect of dry grinding on phase, microstructural and thermal properties of the sintered tablets were carried out by using X-ray diffraction technique (XRD), thermogravimetry/differential thermal analyzer (TG/DTA) and scanning electron microscope (SEM). The effects of grinding on the change of the particle diameter, crystallinity and the phase transformations, and reactivity of the powders were studied. The powders that were pulverized for 30 min showed properties which positively influenced on the decrease of sintering temperature and the increase of the sintering rate of steatite fillers.
PB  - Belgrade . Serbian ceramic society and Institute of technical sciences of SASA)
C3  - Serbian Ceramic Society Conference “Advanced Ceramic and Application V – New frontiers in multifunctional material science and processing”
T1  - Characterization of microstructural and thermal properties of the steatite powders applied as fillers in the ceramic coatings
ER  - 
@conference{
author = "Terzić, Anja and Andrić, Ljubiša and Radojević, Zagorka and Radulović, Dragan and Miličić, Ljiljana and Mijatović, Nevenka",
year = "2016",
abstract = "Steatite is a magnesium silicate multi-componential composite that can be synthesized from natural raw materials, and eventually produced via standard ceramic processing methods and readily machined or sintered into a variety of forms. Due to its excellent electrical properties, high mechanical resistance, low dielectric loss and high temperature resistance, steatite is widely utilized as a material for thermal insulation and heath protection. The raw materials used in steatite powder synthesis are: talc mixture for calcination, clay minerals as bonding agent, and feldspar or BaCO3 as melting agents. The synthesis is usually conducted at approximately 1400°C, and its product is a crystalline phase of magnesium metasilicate (MgSiO3 ) obtained from talc, while melting agent forms a vitreous phase which melts and surrounds the crystalline phase. Steatite ceramics’ fillers were fabricated via combined method of high-energy ball milling, cold pressing and sintering. The powder blends containing same amounts of components in all 4 mixtures were dry-pulverized for 30 min a laboratory mill, with ceramic vial and ceramic balls. After milling, the powders were compacted to cylindrical tablets with a diameter of 25 mm by uniaxial compression at 4 tons/cm2 . The green compacts were sintered at 1000-1400°C (10°C/min) for 2 h in an air atmosphere. The effect of dry grinding on phase, microstructural and thermal properties of the sintered tablets were carried out by using X-ray diffraction technique (XRD), thermogravimetry/differential thermal analyzer (TG/DTA) and scanning electron microscope (SEM). The effects of grinding on the change of the particle diameter, crystallinity and the phase transformations, and reactivity of the powders were studied. The powders that were pulverized for 30 min showed properties which positively influenced on the decrease of sintering temperature and the increase of the sintering rate of steatite fillers.",
publisher = "Belgrade . Serbian ceramic society and Institute of technical sciences of SASA)",
journal = "Serbian Ceramic Society Conference “Advanced Ceramic and Application V – New frontiers in multifunctional material science and processing”",
title = "Characterization of microstructural and thermal properties of the steatite powders applied as fillers in the ceramic coatings"
}
Terzić, A., Andrić, L., Radojević, Z., Radulović, D., Miličić, L.,& Mijatović, N.. (2016). Characterization of microstructural and thermal properties of the steatite powders applied as fillers in the ceramic coatings. in Serbian Ceramic Society Conference “Advanced Ceramic and Application V – New frontiers in multifunctional material science and processing”
Belgrade . Serbian ceramic society and Institute of technical sciences of SASA)..
Terzić A, Andrić L, Radojević Z, Radulović D, Miličić L, Mijatović N. Characterization of microstructural and thermal properties of the steatite powders applied as fillers in the ceramic coatings. in Serbian Ceramic Society Conference “Advanced Ceramic and Application V – New frontiers in multifunctional material science and processing”. 2016;..
Terzić, Anja, Andrić, Ljubiša, Radojević, Zagorka, Radulović, Dragan, Miličić, Ljiljana, Mijatović, Nevenka, "Characterization of microstructural and thermal properties of the steatite powders applied as fillers in the ceramic coatings" in Serbian Ceramic Society Conference “Advanced Ceramic and Application V – New frontiers in multifunctional material science and processing” (2016).