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Article
Exploring the potential of magnesium clusters as effective adsorbents for gaseous radioactive iodine in nuclear energy applications
The interaction of molecular iodine on Mgn (n = 2–18) clusters has been investigated using first-principles calculations. Structural, adsorption energy and electronic properties of these systems are reported. Aft...
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Article
Open AccessAn effective strategy for preparing transparent ceramics using nanorod powders based on pressure-assisted particle fracture and rearrangement
Achieving full densification of some ceramic materials, such as Y2O3, without sintering aids by spark plasma sintering (SPS) is a great challenge when plastic deformation contributes limitedly to the densificatio...
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Article
Open AccessA comprehensive study on Li4Si1−xTixO4 ceramics for advanced tritium breeders
Hetero-element doped lithium orthosilicates have been considered as advanced tritium breeders due to the superior performances. In this work, Li4Si1−xTixO4 ceramics were prepared by proprietary hydrothermal proce...
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Article
Open AccessA new methodology to obtain the fracture toughness of YAG transparent ceramics
A new methodology was proposed for testing the fracture toughness of YAG transparent ceramics depended on temperature. In our model, the fracture toughness, as a material-specific property, can be expressed as...
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Article
Effect of MgO do** on densification and grain growth behavior of Gd2Zr2O7 ceramics by microwave sintering process
In our study, the effect of MgO do** on the densification and grain growth in gadolinium zirconate (Gd2Zr2O7) during microwave sintering was reported, and the nanocrystalline Gd2Zr2O7 and Mg-doped Gd2Zr2O7 raw ...
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Article
The effects of precipitants on co-precipitation synthesis of yttria-stabilized zirconia nanocrystalline powders
Yttrium-stabilized zirconia (Y0.08Zr0.92O1.96, YSZ) nanocrystalline powders were prepared by co-precipitation methods. Different precipitants (ammonium hydroxide, ammonium bicarbonate, oxalic acid, and urea) were...
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Article
Revealing the ductility of nanoceramic MgAl2O4
Ceramics are strong but brittle. According to the classical theories, ceramics are brittle mainly because dislocations are suppressed by cracks. Here, the authors report the combined elastic and plastic deform...
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Article
Ammonium citrate-assisted combustion synthesis and photoluminescence properties of Dy:YAG nanophosphors
Dy3+-doped yttrium aluminum garnet (YAG) nanocrystalline powders were synthesized by employing a sol–gel combustion process, in which triammonium citrate was used as both fuel reagent and dispersant. The influenc...
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Article
Thermal-Driven Fluorite–Pyrochlore–Fluorite Phase Transitions of Gd2Zr2O7 Ceramics Probed in Large Range of Sintering Temperature
Fluorite (F)–pyrochlore (P)–fluorite (F) phase transitions of Gd2Zr2O7 were investigated from 573 K to 1873 K (300 °C to 1600 °C), by means of X-ray diffraction, infrared spectra (IR), and Raman spectra. The low-...
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Article
Fabrication of Yb3+-doped YAG transparent ceramics by aqueous gelcasting
In this work, Yb:YAG transparent ceramics were prepared through aqueous gel-casting forming technique. Single-phase Yb:YAG nanopowders with mean particle size of 170 nm were used to prepare Yb:YAG slurries. T...
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Article
Synthesis of ultra-fine and controllable size distribution nanocrystalline MgAl2O4 powders and ascertainment of aluminum loss by introducing inert atmosphere pre-calcination during combustion
Nanocrystalline magnesium aluminate spinel (MgAl2O4) powders were synthesized in this study by employing a modified nitrate–citrate combustion route, in which the heat treatment was continuously performed by two ...
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Article
Photoluminescence enhancement of YAG:Ce nanophosphors with SiO2 additions
Co-precipitated Y3Al5O12:Ce nanophosphors with enhanced photoluminescence (PL) intensity were synthesized by introducing SiO2 in the precursor. The role of SiO2 on morphologies, PL enhancement and valence state o...
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Article
Two-step preparation of AlON transparent ceramics with powder synthesized by aluminothermic reduction and nitridation method
The aluminothermic reduction and nitridation method using microsized Al powder and nanosized alumina powder was employed to fabricate AlON powder under N2 atmosphere. Single-phase aluminum oxynitride (AlON) can b...
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Article
Open AccessUnique mechanical properties of nanostructured transparent MgAl2O4 ceramics
Nanoindentation tests were performed on nanostructured transparent magnesium aluminate (MgAl2O4) ceramics to determine their mechanical properties. These tests were carried out on samples at different applied loa...
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Article
Preparation and Light Transmission Properties of AlON Ceramics by the Two-Step Method with Nanosized Al2O3 and AlN
The single-phase aluminum oxynitride (AlON) powder used in this experiment was obtained at relatively low temperature by the solid-state-reaction method with nanosized AlN powder and nanosized alumina powder. ...
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Article
Preparation of YAG powder by co-precipitation method in a narrow pH-change environment
YAG (Y3Al5O12) powder was prepared by co-precipitation method. To avoid pH values changing intensely during titration process, the NH4HCO3 solution with NH4NO3 was used as precipitant solution. The pH change of p...
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Article
Open AccessYield Strength of Transparent MgAl2O4 Nano-Ceramic at High Pressure and Temperature
We report here experimental results of yield strength and stress relaxation measurements of transparent MgAl2O4 nano-ceramics at high pressure and temperature. During compression at ambient temperature, the diffe...
