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Упит dcterms_subject_txt:Perovskite/spinel ceramics

49 items

  • Structural, morphological and up-converting luminescence characteristics of nanocrystalline Y2O3:Yb/Er powders obtained via spray pyrolysis

    Lojpur Vesna, Mančić Lidija, Vulić Predrag, Dramićanin Miroslav D., Rabanal Maria Eeugenia, Milošević Olivera (2014)

  • Comparison of raw clay from different localities for application in the production of traditional pottery in Serbia

    Maja Milošević, Alena Zdravković, Biljana Đorđević (2022)

  • Examination of mineral composition and color origin in natural pigments from France and Finland that are stored in the collection of rocks and minerals, University of Belgrade

    Alena Zdravković, Maja Milošević (2022)

  • Asbestos-Based Pottery from Corsica: The First Fiber-Reinforced Ceramic Matrix Composite

    Philippe Colomban, Aleksandar Kremenović (2020)
    Asbestos-containing pottery shards collected in the northeast of Corsica (Cap Corse) and dating from the 19th century, or earlier, have been analyzed by SEM-EDS, XRPD, FTIR and Raman microspectroscopy. Blue (crocidolite) and white (chrysotile) asbestos fiber bundles are observed in cross-sections. Most of the asbestos is partly or totally dehydroxylated, and some transformation to forsterite is observed to occur, indicative of a firing above 800 C. Examination of freshly fractured pieces shows a nonbrittle fracture with fiber pull-out, consistent with ...
    asbestos, CMC, Corsica, fiber, pottery
    ... of freshly fractured pieces shows a nonbrittle fracture with fiber pull-out, consistent with a composite material behavior, which makes these ceramics the oldest fiber-reinforced ceramic matrix composite. Residues indicate the use of this pottery as a crucible for gold extraction using cyanide ...
    ... d pottery from Corsica in an unpublished manuscript [6]. This demonstrates the interest of the founder of ceramic processing science in special ceramics. More recently, ethnological studies on this asbestos-based pottery were published in French in specialized journals [6,7] and drew attention ...
    ... broad O-H band peaking at ~3400 cm~! with a d shoulder at 3200 cm~! is assignable to water traces adsorbed at the pore surface, as observed for many ceramics. Materials 2020, 13, 3597 5of 18 Figure 2. SEM micrographs showing;, asbestos fiber clusters in broken sections of samples (a,b,d) (see Figure ...

  • Solid state synthesis of extra phase-pure Li4Ti5O12 spinel

    Ivana Veljković, Dejan Poleti, Ljiljana Karanović, Miodrag Zdujić, Goran Branković (2011)
    Фазно чист спинел Li4Ti5O12 са величином честица мањом од 500 nm добијен је реакцијом у чврстом стању из стехиометријске смеше наноанатаса (ТiО2) и Li2CO3 која је претходно активирана механохемијским поступком. Реакција у чврстом стању у потпуности се завршава за само 4 часа на температури од 800 ºC. Уз помоћ XRPD, SEM и TG/DSC анализе испитане су структурне и микроструктурне карактеристике добијеног спинела, механизам реакције између анатаса и Li2CO3, као и термичка стабилност Li4Ti5O12. Реакција започиње разлагањем Li2CO3 на температурама ...
    дифракција рендгенских зрака, механизам реакције, термичка стабилност, Li4Ti5O12, спинел, фазно чист узорак

  • Towards Better Valorisation of Industrial Minerals andRocks in Serbia—Case Study of Industrial Clays

    Vladimir Simić, Dragana Životić, Zoran Miladinović (2021)
    Management, Monitoring, Policy and Law,Nature and Landscape Conservation
    ... Common clays in Serbia include clays (from sedimentological point of view), and all mineral raw materials used in the clay- based structural products (ceramics), such as loess, oil shales, separation tailings rich in organic matter, products obtained by washing of coal and other natural raw materials. The ...
    ... separated. Namely, there is a significant difference in the re- quirements for the quality of raw materials to produce these assortments of construc- tion ceramics, which had to be reflected in the practice during exploration. An indic- ative example of irrational spending of financial resources is for tests ...
    ... requirements for certain grades of raw materials. In the case of geologically relatively simple deposits (aggregate rocks, raw materials for struc- tural ceramics), equivalence can also be done automatically according to the model pro- posed by [75]. Figure 3 shows the usual, but also some possible combinations ...

  • BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1) Composites Synthesized by Thermal Decomposition: Magnetic, Dielectric and Ferroelectric Properties

    Marija Šuljagić, Ivan Petronijević, Miljana M. Mirković, Aleksandar Kremenović, Adis Džunuzović, Vladimir B. Pavlović, Aleksandra Kalezić-Glišović, Ljubica Andjelković (2023)
    To investigate the influence of spinel structure and sintering temperature on the functional properties of BaTiO3/NixZn1−xFe2O4 (x = 0, 0.5, 1), NiFe2O4, ZnFe2O4, and Ni0.5Zn0.5Fe2O4 were in situ prepared by thermal decomposition onto BaTiO3 surface from acetylacetonate precursors. As-prepared powders were additionally sintered at 1150 °C and 1300 °C. X-ray powder diffraction (XRPD) and scanning electron microscopy (SEM) coupled with electron dispersive spectroscopy (EDS) were used for the detailed examination of phase composition and morphology. The magnetic, dielectric, and ...
    ferroelectric, dielectric properties, magnetic properties, titanate/ferrite composites, phase composition
    ... and 1300 "C) to obtain dense ceramics. Since phase composition and morphology have a significant influence on the material functional properties, the XRPD, as well as SEM was performed and the results were evaluated in detail. Generally, the spinel and perovskite phases were dominant for as-prepared ...
    ... as-prepared materials, while spinel, perovskite, and barioferrite-like phases in different ratios prevailed in the case of sintered samples. Although the final sintering, stage was not reached at both chosen temperatures, a significantly better sintering, effect was noticed at 1300 "C, especially ...
    ... Npj Comput. Mater. 2017, 3, 18. [CrossRef] 10. Liu,H.;Yang,X.A brief review on perovskite multiferroics. Ferroelectrics 2017, 507, 69–85. [CrossRef] 11. Dong,S.;Liu,J.-M. Recent Progress of Multiferroic Perovskite Manganites. Mod. Phys. Lett. B 2012, 26, 1230004. [CrossRef] 12. Saini J.; Sharma ...

  • Synthesis, characterization and photocatalytic examination of Co0.9Ho0.1MoO4 nanopowders

    Milena Rosić, Maja Milošević, Maria Čebela, Vladimir Dodevski, Vesna Lojpur, Radomir Ljupković, Aleksandra Zarubica (2023)
    ... Materials Programme and Book of Abstracts of The Seventh Conference of The Serbian Society for Ceramic Materials publishes abstracts from the field of ceramics, which are presented at international Conference. FEditors-in-Chief Dr Branko Matović Dr. Jelena Maletaškić Prof. Vladimir V. Srdić Publisher ...

  • Синтеза и карактеризација керамике на бази сфена

    Jelena R. Pantić (2015-07-10)
    Механохемијска активација стехиометријске смеше реактаната TiO2, SiO2 и CaCO3 показала се као веома успешна и једноставна метода за добијање сфена (CaTiSiO5). На основу мерења релативних густина свих синтерованих узорака установљено је да максималну густину од 93,9 % имају узорци који су активирани 30 минута и синтеровани на 1200 °С. Микроструктурном анализом, тј. анализом слика синтерованих узорака активираних 30 минута, које су добијене скенирајућом електронском микроскопијом, опажа се бимодална расподела величине зрна, са просечном величином од 3 μm, односно 5 ...
    сфен, механохемија, Ритвелдова метода, оптичка спектроскопија, микроструктурна анализа, фазна трансфоpмација, чврсти раствори
    ... crystalline phase. The other two phases (perovskite and coesite) are present at all temperatures indicating its minor amounts. Quantitative analysis was calculated from the Rietveld refinement. Percentage of each phase is 93.3 % for sphene, 2.9 % for perovskite and 3.8 % for coesite. Ceramic pigments ...
    ... and characterization of sphene based ceramics Jelena R. Pantić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Синтеза и карактеризација керамике на бази сфена;Synthesis and characterization of sphene based ceramics | Jelena R. Pantić | Универзитет у Београду ...
    ... SYNTHESIS AND CHARACTERIZATION OF SPHENE BASED CERAMICS Abstract Sphene (CaTiSiO5) was successfully obtained from a mixture of TiO2, SiO2 and CaCO3 using mehanochemical activation. This simple method proved to be suitable to get sphene ceramics. Theoretical density was calculated for each ...

  • Синтеза и карактеризација керамике на бази сфена

    Jelena R. Pantić (2015-07-10)
    Механохемијска активација стехиометријске смеше реактаната TiO2, SiO2 и CaCO3 показала се као веома успешна и једноставна метода за добијање сфена (CaTiSiO5). На основу мерења релативних густина свих синтерованих узорака установљено је да максималну густину од 93,9 % имају узорци који су активирани 30 минута и синтеровани на 1200 °С. Микроструктурном анализом, тј. анализом слика синтерованих узорака активираних 30 минута, које су добијене скенирајућом електронском микроскопијом, опажа се бимодална расподела величине зрна, са просечном величином од 3 μm, односно 5 ...
    сфен, механохемија, Ритвелдова метода, оптичка спектроскопија, микроструктурна анализа, фазна трансфоpмација, чврсти раствори
    ... crystalline phase. The other two phases (perovskite and coesite) are present at all temperatures indicating its minor amounts. Quantitative analysis was calculated from the Rietveld refinement. Percentage of each phase is 93.3 % for sphene, 2.9 % for perovskite and 3.8 % for coesite. Ceramic pigments ...
    ... and characterization of sphene based ceramics Jelena R. Pantić Дигитални репозиторијум Рударско-геолошког факултета Универзитета у Београду [ДР РГФ] Синтеза и карактеризација керамике на бази сфена;Synthesis and characterization of sphene based ceramics | Jelena R. Pantić | Универзитет у Београду ...
    ... SYNTHESIS AND CHARACTERIZATION OF SPHENE BASED CERAMICS Abstract Sphene (CaTiSiO5) was successfully obtained from a mixture of TiO2, SiO2 and CaCO3 using mehanochemical activation. This simple method proved to be suitable to get sphene ceramics. Theoretical density was calculated for each ...

  • Structural characterization of traditional pottery produced from local clay, Rujište (Ražanj, Central Serbia), in an effort to preserve its geoheritage

    Maja Milošević, Biljana Đorđević, Alena Zdravković (2021)
    ... djordjevic@narodnimuzej.rs Pottery making in Rujište near the Municipality of Ražanj (Central Serbia) is one of the most archaic ways of producing ceramics. “Crepulja” – bread-baking pan, a specific type of pottery, is made of two types of clay that are excavated exclusively at the location called ...

  • Influence of Ag doping on the morphological and magnetic properties in CuO nanopowders

    Maria Čebela, Uroš Čakar, Vesna Lojpur, Maja Milošević, Sanja Krstić, Vladimir Dodevski, Milena Rosić (2023)
    ... Materials Programme and Book of Abstracts of The Seventh Conference of The Serbian Society for Ceramic Materials publishes abstracts from the field of ceramics, which are presented at international Conference. FEditors-in-Chief Dr Branko Matović Dr. Jelena Maletaškić Prof. Vladimir V. Srdić Publisher ...

  • An insight into the evolution of the lithospheric mantle of south Saharan metacraton: Mantle xenoliths from Jabal Eghei Volcanic Complex, Libya

    Vladica Cvetković, Maša Radivojević, Dejan Prelević, Marinko Toljić, Salah M. Turki (2022)
    Bazaltni magmatizam, Osiromašenje omotača, Metasomatizam, Subkontinentalni omotač, Spinelski lerzolit

  • Синтеза, структурне и магнетне особине Ca1-xGdxMnO3 нанопрахова

    Milena Rosić (2014-12-05)
    У оквиру ове докторске тезе, испитиване су оптималне методе за добијањенанопраха – калцијум манганског оксида допираног јонима гадолинијума. Циљистраживања је испитивање одговарајућих прекурсора који су подесни да седобију чисти нано прахови манганита са перовскитском структуром, као имонофазни чврсти раствори са перовскитском структуром. Као подесан методкоришћена је модификована глицин нитратна метода, а од прекурсора нитрати иацетати одговарајућих метала. Модификација глицин нитратне методе се односина делимичну замену нитрата ацетатима, чиме је ублажена бурност реакције.Испитан је различити однос прекурсора, који дају наночестичне ...
    Наноструктурни материјали, Оксиди, Термална анализа,Рендгенструктурна анализа, Магнетна мерења.
    ... nanopowders deagglomeration on the densities of nanocrystalline ceramics green body and their sintering behavior, NanoStructured Materials, Vol. 11, No. 5, pp. 617–622. Glazer, A. M. (1975): Simple Ways of Determining Perovskite Structures. Acta Cryst. A31, 756-762. Goldschmidt, V. M. (1926): ...
    ... the research is to examine the appropriate precursors that are suitable to obtain pure nano powders of perovskite manganite structure, as well as single-phase solid solutions with a perovskite structure. As a suitable method used is a modified glycine nitrate method, a precursor nitrates and acetates ...
    ... перовскита може да прими катјоне различитог радијуса и наелектрисања, из тог разлога за неке перовските једначина (6) није задовољена. Када се јон савршено уклапа, овај фактор има вредност 1. За перовските t се дефинише као: ( )XB XA rr rr t + + = 2 ...

  • Дефинисање археолошких објеката на локалитету Кремените њиве применом Ојлерове 3Д деконволуције на магнетометријске податке

    Весна Цветков, Илија Васиљевић, Бранислав Сретеновић, Весна Дамњановић (2018)
    ... be amplified or diminished by the fields arising from archaeological objects such as: fireplaces and burnt  houses, pits filled with fragments of ceramics or large whole containers, removal or accumulation of the  surface layer of soil, stone structures (foundations of houses or paved streets), iron ...

  • Characterization and Environmental Evaluation of Recycled Aggregates from Construction and Demolition Waste in Belgrade City Area (Serbia)

    Filip Abramović, Miroslav Popović, Vladimir Simić, Vesna Matović, Radmila Šerović (2024)
    General Materials Science

  • Phase relations and physical indicators of municipal waste from old landfills in Serbia

    Dragoslav R Rakić, Irena G Basarić Ikodinović, Jovana M Janković, Tina D Đurić (2021)
    Due to certain similarities of municipal waste and soil, usually for the determination of basic parameters of physical state, laboratory and field tests which are common in geotechnical investigations are used. It is often to construct an apparatus for special purpose to perform some specific laboratory and field tests. Therefore, different values of indicators of municipal waste physical state can be found in the literature. The basic reasons should be found in different definitions and methods that researchers use ...
    municipal waste, moisture content, unit weight, specific gravity, grain size distribution, porosityGeneral Computer Science
    ... organic (o), liquid (v) and gaseous (a) phase (Figure 3). Inert phase consists of non-degradable materials such as plastic, metal, rock pieces, ceramics, glass and similar materials. All other materials would be in organic phase. This four-phase representation of municipal waste phase composition ...

  • Refinement of waste phosphogypsum from Prahovo, Serbia: characterization and assessment of application in civil engineering

    Josip Išek, Lazar Kaluđerović, Nikola Vuković, Maja Milošević, Ivana Vukašinović, Zorica Tomić (2020)
    γ-spectrometry, brushite, chukhrovite, phosphogypsum, radionuclides, recrystallization
    ... Z., Li T., Shu Z., Chen Y. & Wang Y. (2016) Preparation of har- dened tiles from waste phosphogypsum by a new intermittent pressing hydration. Ceramics International, 42, 7237–7245. ...

  • Geochemical evaluation of dolostone deposits in Montenegro: Implications for potential industrial applications

    Darko Bozovic, Vladimir Simic, Dragan Radulovic, Slobodan Radusinovic, Vesna Matovic, Anja Terzic (2024)
    This study presents a unique model for assessing the dependability of continuous parts of combined systems in open-pit mining through the application of fuzzy logic. Continuous sub-systems as part of the combined system of coal exploitation in surface mines have the basic function of ensuring safe operation, high capacity with high reliability, and low costs. These subsystems are usually part of the thermal power plant’s coal supply system and ensure stable fuel supply. The model integrates various independent partial ...
    примарне сировине, минералогија, физичко-механичка својства, технолошка својства, наука о материјалима

  • Structural dissymmetrization of optically anisotropic Grs64±1Adr36±1Sps2 grandite from Meka Presedla (Kopaonik Mt., Serbia)

    Pavle Tančić, Aleksandar Kremenović, Predrag Vulić (2019)
    In this paper, grandite core with Grs64±1Adr36±1Sps2composition was crystallographically studied. This core represents zone A of the macroscopically visiblefive A–E zones of the optically anisotropic Grs58–64 Adr36–42Sps2 grandite. The applied procedure includes the detailed analysis of the powder diffraction patterns, and the Rietveld refinements of the crystal structures in a series of 18 space groups and two mixtures, which were followed by the comparative analysis of the R-values, site occupancy factors, and the bond lengths and angles. Synthesis of all ...
    grandite, XRPD, crystal structure, structural dissymmetrization