Academic literature on the topic 'Ceramic and Materials Science and Engineering. Ceramics. Rare earths'

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Journal articles on the topic "Ceramic and Materials Science and Engineering. Ceramics. Rare earths"

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Karunaratne, B. S. B., R. J. Lumby та M. H. Lewis. "Rare-earth-doped α′-Sialon ceramics with novel optical properties". Journal of Materials Research 11, № 11 (1996): 2790–94. http://dx.doi.org/10.1557/jmr.1996.0353.

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A new phenomenon in the field of Sialon ceramics is reported which may lead to applications based on their optical or electronic properties in combination with their mechanical and thermal properties. For the first time a colored α′-Sialon ceramic has been synthesized, with relatively high optical transparency by careful control of the sintering atmosphere, and adding suitable rare earths as stabilizing cations. This compares with normal Sialons and silicon nitrides which are grey-black in color and are opaque. Oxidation/reduction mechanisms have been identified as an influence on the valence
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Lahoz, F., I. R. Martín, U. R. Rodríguez-Mendoza, et al. "Rare earths in nanocrystalline glass–ceramics." Optical Materials 27, no. 11 (2005): 1762–70. http://dx.doi.org/10.1016/j.optmat.2004.11.047.

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Kim, Dong Wan, and Kug Sun Hong. "Materials Design with Enhanced Temperature Stability of Resonant Frequency for High Frequency Application." Solid State Phenomena 124-126 (June 2007): 173–76. http://dx.doi.org/10.4028/www.scientific.net/ssp.124-126.173.

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For low temperature cofired ceramic (LTCC) materials to achieve increase functionality, as well as low loss and moderate dielectric constant, it is essential to achieve the temperature stability of the resonant frequency. Facing several empirical approaches toward tuning the temperature coefficient of the resonant frequency (τf) through the formation of mixtures or a solid-solution between the two end members with opposite signs of τf, which result in higher dielectric loss, we took a closer look at the texture engineering that determines the anisotropic dielectric properties in barium niobate
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Rosson, Egle, Acacio Rincón Romero, Denis Badocco, et al. "Production of Porous Ceramic Materials from Spent Fluorescent Lamps." Applied Sciences 11, no. 13 (2021): 6056. http://dx.doi.org/10.3390/app11136056.

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Spent fluorescent lamps (SFL) are classified as hazardous materials in the European Waste Catalogue, which includes residues from various hi-tech devices. The most common end-of-life treatment of SFL consists in the recovery of rare earth elements from the phosphor powders, with associated problems in the management of the glass residues, which are usually landfilled. This study involves the manufacturing of porous ceramics from both the coarse glass-rich fraction and the phosphor-enriched fraction of spent fluorescent lamps. These porous materials, realizing the immobilization of Rare Earth E
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Zheng, Hairong, Xiangyu Zhang, Dangli Gao, and Richard S. Meltzer. "Optical Dephasing of Triply Ionized Rare Earths in Transparent Glass Ceramics Containing LaF3 Nanocrystals." Journal of Nanoscience and Nanotechnology 8, no. 3 (2008): 1214–17. http://dx.doi.org/10.1166/jnn.2008.18174.

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Optical dephasing of Pr3+ and Tm3+ ions doped in transparent oxyfluoride glass ceramics was studied with the two-pulse photon echo technique. It was found that the dephasing time of rare earth ions is dramatically less in nanocrystals embedded in a glass matrix than in bulk crystals. Aquasi-linear temperature dependence obtained at low temperatures proved that the long-range interaction of the ions inside the nanocrystals with the two level systems of the glass matrix dominates the optical dephasing. The local thermal effect in glass ceramics containing nanocrystals elevates the local temperat
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Surendran, Kuzhichalil Peethambaran, Sam Solomon, Manoj Raama Varma, Pezholil Mohanan, and Mailadil Thomas Sebastian. "Microwave dielectric properties of RETiTaO6 (RE = La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Y, Er, Yb, Al, and In) ceramics." Journal of Materials Research 17, no. 10 (2002): 2561–66. http://dx.doi.org/10.1557/jmr.2002.0372.

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Microwave dielectric ceramics based on RETiTaO6 (RE = La, Cc, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Y, Er, Yb, Al, and In) were prepared using a conventional solid-state ceramic route. The structure and microstructure of the samples were analyzed using x-ray diffraction and scanning electron microscopy techniques. The sintered samples were characterized in the microwave frequency region. The ceramics based on Ce, Pr, Nd, Sm, Eu, Gd, Tb, and Dy, which crystallize in orthorhombic aeschynite structure, had a relatively high dielectric constant and positive τf while those based on Ho, Er, and Yb, with o
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Ali, Murad, Yaseen Iqbal, and Raz Muhammad. "Phase evolution and microwave dielectric properties of A5M5O17-type ceramics." Materials Science-Poland 35, no. 2 (2017): 362–67. http://dx.doi.org/10.1515/msp-2017-0047.

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Abstract A number of A5M5O17 (A = Na, Ca, Sr, La, Nd, Sm, Gd, Dy, Yb; B = Ti, Nb, Ta) type compounds were prepared by a solid-state sintering route and characterized in terms of structure, microstructure and microwave dielectric properties. The compatibility of rare earths with mixed niobate/tantalate and titanate phases was investigated. The larger ionic radii mismatch resulted in the formation of pyrochlore and/or mixed phases while in other cases, pure A5M5O17 phase was formed. The samples exhibited relative permittivity in the range of 35 to 82, quality factor (Q × fo) = 897 GHz to 11946 G
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Zheng, Hairong, Xiangyu Zhang, Dangli Gao, and Richard S. Meltzer. "Optical Dephasing of Triply Ionized Rare Earths in Transparent Glass Ceramics Containing LaF3 Nanocrystals." Journal of Nanoscience and Nanotechnology 8, no. 3 (2008): 1214–17. http://dx.doi.org/10.1166/jnn.2008.342.

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Gautam, C. R., Devendra Kumar, and Om Parkash. "Crystallization Behavior and Microstructural Analysis of Lead-Rich () Glass Ceramics Containing 1 mole." Advances in Materials Science and Engineering 2011 (2011): 1–11. http://dx.doi.org/10.1155/2011/402376.

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Solid solution of perovskite Pb,SrTiO3in Pb-rich composition can be crystallized in borosilicate glassy matrix. The addition of rare earth and transition metal oxides is known to influence the crystallization behavior and surface morphology of perovskite crystallites in glassy matrix. In the present paper, the glasses in the lead-rich system 64[(PbxSr1-x)·TiO3]-25[2SiO2·B2O3]-5[K2O]-5[BaO] () with the addition of 1 mol % La2O3were prepared to study its effect on their crystallization behavior. Differential thermal analysis (DTA) patterns show one or more exothermic crystallization sharp peaks,
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Yi, Hao, Junwei Che, Gongying Liang, and Xiangyang Liu. "Effect of Rare Earth Elements on Stability and Sintering Resistance of Tetragonal Zirconia for Advanced Thermal Barrier Coatings." Crystals 11, no. 3 (2021): 287. http://dx.doi.org/10.3390/cryst11030287.

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The effect of dopant species on the sintering resistance of zirconia-based ceramics remains a huge challenge in terms of both experiment and theory. As one of the most popular materials for high-temperature protective coatings, it is still urgent to obtain rare earth-doped ZrO2 with high sintering resistance and good phase stability. Here, the sintering resistance and phase stability of rare earth oxides (La2O3, Nd2O3, Gd2O3, and Y2O3)-stabilized zirconia (ZrO2) were thoroughly studied by theoretical and experimental methods. According to experimental data, ZrO2 doped with rare earth ions with
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Dissertations / Theses on the topic "Ceramic and Materials Science and Engineering. Ceramics. Rare earths"

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Hubert, Mathieu. "Chalcogenide Glasses for Infrared Applications: New Synthesis Routes and Rare Earth Doping." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/223357.

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Chalcogenide glasses and glass-ceramics present a high interest for the production of thermal imaging lenses transparent in the 3-5 μm and 8-12 μm windows. However, chalcogenide glasses are conventionally synthesized in sealed silica ampoules which have two major drawbacks. First, the low thermal conductivity of silica limits the sample dimensions and second the silica tubes employed are single use and expensive, and represent up to 30% of the final cost of the material. The present work therefore addresses the development of innovative synthesis methods for chalcogenide glass and glass-cerami
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Czerepinski, Jennifer H. "Mixedness determination of rare earth-doped ceramics." 2009. http://hdl.rutgers.edu/1782.2/rucore10001600001.ETD.000050502.

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Book chapters on the topic "Ceramic and Materials Science and Engineering. Ceramics. Rare earths"

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Souza, Dulcina M., and Adilson L. Chinelatto. "Rare-Earth Doped Aluminous Electrical Porcelain." In Materials & Equipment/Whitewares: Ceramic Engineering and Science Proceedings, Volume 23, Issue 2. John Wiley & Sons, Inc., 2008. http://dx.doi.org/10.1002/9780470294734.ch9.

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Conference papers on the topic "Ceramic and Materials Science and Engineering. Ceramics. Rare earths"

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Greene, Rawley B., and Jamie J. Kruzic. "Fatigue Behavior, Bridging Stresses, and Fatigue Reliability in Silicon Nitride Ceramics." In ASME 2011 International Manufacturing Science and Engineering Conference. ASMEDC, 2011. http://dx.doi.org/10.1115/msec2011-50056.

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Silicon nitride ceramics doped with rare-earth oxides exhibit excellent hardness, toughness, and strength at elevated temperatures making them attractive materials for replacing cemented carbides in a variety of manufacturing applications such as cutting and rolling tools. One recent example is the application of rolling of high strength alloy wires from steels and nickel-based super-alloys where cemented carbide rolls suffer wear and thermal fatigue cracking, leading to a degradation of wire quality. [1] Furthermore, it has been shown that under moderate loading silicon nitride rolls can give
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