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Processing and Application of Ceramics
Scopus
ISSN 1820-6131 · University of Novi Sad · 712 artikel di indeks
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Microstructure evolution of highly ordered Bi4Si3O12 microcrystals
This study reports the preparation of dendritic bismuth silicon oxide (Bi4Si3O12) microcrystals by using solid state reaction stages and heating of Bi2O3-SiO2 powder mixture at 800 °C for different holding times and ambient conditions. X-ray diffractometer (XRD) and scanning electron microscopy…
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Sintering of nanopowder based on an ordered phase with a perovskite-type LaLuO3:Yb3+ structure
The present work developed a methodology for synthesising single-phase nanopowder based on an ordered phase with LaLuO3 perovskite type structure. The LaLuO3:Yb3+ nanopowder, doped with 2 mol% Yb3+, was synthesised by wet-chemical method from precursor nitrate solution and thermal treated to form…
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Direct determination of the contact area based on the concept of rounded indenter tip correction for Berkovich nanoindentation tests: Case study on silica glass
Determination of the contact area is a key issue for extracting the mechanical properties from the analysis of nanoindentation load-displacement (P-h) curves. In this paper, a new method for the direct determination of the contact area with the empirical equation A = C(Hc + Hd)2 was proposed. It is…
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Enhanced bone regeneration with curcumin incorporated and Sr-substituted biphasic calcium phosphate ceramics: Synthesis, characterisation and biomedical applications
Biphasic calcium phosphate (BCP) ceramics are prevalent bone substitutes owing to their potential to accelerate bone development. However, improving the degradation ability and the osteoinductive properties of implantable bone filler BCP ceramics is technically challenging. The incorporation of…
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Lead-free high-entropy Ba(Ti0.2Zr0.2Hf0.2Sn0.2Ce0.2)O3 ceramics: Structural stabilisation and impedance spectroscopic insights for high-temperature electronic applications
A novel high-entropy perovskite, Ba(Ti0.2Zr0.2Hf0.2Sn0.2Ce0.2)O3, was successfully synthesized through a conventional solid-state reaction route and finally sintered at 1350 °C for 12 h. Powder X-ray diffraction and Rietveld refinement confirmed the formation of a single-phase cubic structure with…
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Effect of B2O3 addition on structure of nepheline glass-ceramics for dental applications
This study investigates the effect of substituting Al2O3 with B2O3 (0-4 mol%) in nepheline-based glasses intended for advanced dental applications. Differential scanning calorimetry, X-ray diffraction, Raman spectroscopy, dilatometry and scanning electron microscopy were used to examine the…
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Investigation of the effects of quercetin on the structure and properties of zinc-modified hydroxyapatites
In this study, hydroxyapatite (HAp) samples, co-doped with 0.44 at.% of zinc and different amount of quercetin (Zn/Que-HAp), were synthesised using a wet-chemical method and calcined at 900°C. XRD shows HAp as the primary phase with minor β-TCP. Compared to the Zn-doped sample without quercetin…
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Effect of sintering temperature on the structure and properties of in situ synthesized B4C-TiB2 composites
Boron carbide (B4C) ceramics, owing to their ultra-high hardness, low density and excellent neutron absorption capability, have significant potential in applications such as armour, nuclear industry and cutting tools. However, their inherently low fracture toughness at ambient temperature and…
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Master sintering curve and microstructure evolution of perovskite layer structured La2Ti2O7 ceramics
The master sintering curve (MSC) theory is one of the widely used theories to predict the densification behaviour of a given powder and green body irrespective of its thermal history. In this paper, MSC was constructed for a high Curie temperature piezoelectric, La2Ti2O7. Powder synthesis was…
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Waste-derived Fe3O4/ZnO composite for advanced fenton-like wastewater treatment
This study presents a novel and sustainable precipitation method for synthesis of Fe3O4/ZnO composite powder directly from corrugated galvanised iron (CGI) waste, addressing gaps in waste-derived catalysts for advanced oxidation processes. XRD characterisation revealed that the Fe3O4/ZnO powder…
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Zirconia powders obtained from zirconyl nitrate by precipitation with the varied concentration of the ammonium hydroxide
Phase stability and degradation of zirconia-based ceramics, which represents a very important industrial material, highly depend on the dispersity and structure of the raw powder materials. The aim of this research was to study the influence of the concentration of the precipitating agent (ammonia)…
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Effect of Vickers indentation defects on the biaxial flexural strength of float glass in wet environments: A Weibull analysis
This research examines how Vickers indentation-induced flaws affect the strength and failure probability of Mediterranean float glass (MFG), specifically under biaxial flexural testing in distilled water. In total, fifteen square samples (50 × 50mm2 each) were subjected to a constant loading rate…
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Study of in vitro bioactivity of biogenic hydroxyapatite synthesized from Black Sea Rapana venosa shells
The biogenic hydroxyapatite (BHA) used in this study was synthesized via solid-state reaction from Rapana venosa shells - a natural CaO source and monocalcium phosphate monohydrate Ca(H2PO4)2 •H2O. The in vitro bioactivity of the synthesized BHA was evaluated in simulated body fluid (SBF) over 4…
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Modified calcium hexaaluminate with La2Ce2O7 and corrosion resistance to cathode materials for lithium-ion batteries
In the present work calcium hexaaluminate (CA6) was modified with different amounts of La2Ce2O7 to improve sintering and explore its application possibility as the saggers for lithium-ion battery cathode material. It was found that the addition of La2Ce2O7 causes incorporation of La3+ and Ce4+ ions…
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Synthesis and optical properties of Mn2+/Mn4+ doped ZnWO4 powders for multi-purpose applications
In the present investigation, pure ZnWO4 and 1mol% Mn-doped ZnWO4 (ZnWO4:Mn2+ and ZnWO4:Mn4+) ceramic powders were synthesized by the conventional solid-state reaction method. The structural and microstructural studies were performed using X-ray diffraction, field emission scanning electron…
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In situ Xe ion irradiation of Nd-doped CaTiO3 perovskite ceramics to simulate nuclear waste immobilization
Developing efficient ceramic waste forms with high radiation stability for radioactive waste immobilization is very important for human and environmental safety. In this work, Ca1-xNd2x/3TiO3 (x = 0.225, 0.375 and 0.85) ceramics were prepared using solid state reaction method. Neodymium (Nd) was…
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Phase relations in the Eu2O3-Fe2O3 system at 1300 and 1400 °C
Phase relations in the Eu2O3-Fe2O3 system at 1300 and 1400°C were studied in the whole concentration range by X-ray diffraction and scanning electron microscopy. The samples were prepared with a concentration step of 1 to 5mol%. The samples of different compositions were prepared from nitrate acid…
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Structural and photoluminescence study of Mn doped ZnO nanostructures assisted by PVP
The tuneable band gap properties of ZnO (II-VI semiconductor) make it an excellent host lattice phosphor for photonic and electroluminescent device applications. Here we report a simple and low-temperature chemical precipitation method (70 °C) to tune both morphology and optical emission of ZnO…
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Ceramic-metal interface: Effect of titanium activity on interfacial microstructure formation in vacuum-brazed Al2O3/Al alloy joints
Plasma-assisted physical vapour deposition of titanium over an alumina surface, brazed with an aluminium alloy substrate using Al4047 filler, was conducted in a vacuum ranging from 1 × 10−3 to 10−5 mbar. Microstructure characterization, specifically focusing on the Al2O3-Ti coating interface, aims…
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Optimized La1-xSrxGa1-yMgyO3-δ (0.1 ≤ x, y ≤ 0.3) electrolytes for solid oxide fuel cells applications: Synthesis, structural characterization and properties
This study explores the synthesis, structural characterization and properties of five different La1-xSrxGa1-yMgyO3-δ (0.1 ≤ x,y ≤ 0.3) samples. Precursor powders were synthesized via the Pechini method and the corresponding ceramic samples were obtained by pressing under vacuum at 210MPa and…