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4.296 Aktuelle Fachpublikationen in Journal of the American Ceramic Society

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Luminescent Properties of Eu3+-Doped BaLn2ZnO5 (Ln=La, Gd, and Y) Phosphors by the Sol–Gel Method

11.03.2010 | Chongfeng Guo, Xu Ding, Yan Xu, Journal of the American Ceramic Society, 2010

Three series of Eu3+-doped BaLn2[minus]xEuxZnO5 (Ln=Y, Gd, and La) phosphor powders were prepared by the sol[ndash]gel process. Parameters that affect the photoluminescence (PL) intensity of phosphors were investigated in detail. The phase formation and identification of samples were ...

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Mechanism and Role of Mechanochemical Activation in the Synthesis of (K,Na,Li)(Nb,Ta)O3 Ceramics

11.03.2010 | Tadej Rojac, Andreja Benčan, Marija Kosec, Journal of the American Ceramic Society, 2010

Using mechanochemical activation, a homogeneous (K0.485Na0.485Li0.03)(Nb0.8Ta0.2)O3 (KNLNT) solid solution can be obtained after subsequent calcination and sintering. The present study aims to elucidate the origin of the high homogeneity of the activated powder and its relation to the synthesis ...

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Structural Changes in Silica Glass by Continuous-Wave Laser Backside Irradiation

17.02.2010 | Hirofumi Hidai, Masato Yoshioka, Kuniaki Hiromatsu, Hitoshi Tokura, Journal of the American Ceramic Society, 2010

We report on a permanent change in the physical properties inside silica glass by rapid heating and quenching using a continuous-wave laser beam. The absorption of the glass was enhanced by laser heating, and the heated spot moved as a result of thermal radiation and conduction. To trigger ...

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Chemical and Microstructural Characterization of 20-Month-Old Alkali-Activated Slag Cements

08.02.2010 | Aaron Richard Sakulich, Sean Miller, Michel W. Barsoum, Journal of the American Ceramic Society, 2010

Chemical and microstructural characterization of environmentally friendly alkali-activated slag cement pastes and fine-limestone aggregate concretes have been carried out after aging for 20 months and compared with 55-day-old cement pastes. Although the production of crystalline phases slowed, ...

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Electrical Properties of High Curie Point Pb0.6Bi0.4 (Ti0.75Zn0.15Fe0.10)O3 Ceramics

08.02.2010 | Feifei An, Jian Yu, Journal of the American Ceramic Society, 2010

Perovskite-structured Pb0.6Bi0.4(Ti0.75Zn0.15Fe0.1)O3 ceramic patches were prepared with conventional electronic ceramic processing on the basis of its near-zero thermal expansion coefficient, in contrast to most of PbTiO3-based solid solutions with decreasing tetragonality and Curie temperature. ...

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Preparation and Characterization of a New Microwave Dielectric Ceramic Ba4ZnTi11O27

14.01.2010 | Huanfu Zhou, Xiuli Chen, Liang Fang, Changzheng Hu, Hong Wang, Journal of the American Ceramic Society, 2010

Preparation, sintering behavior, and microwave dielectric properties of Ba4ZnTi11O27 ceramic were investigated. The single-phase Ba4ZnTi11O27 ceramic can be well densified in the temperature range from 1175° to 1250°C with a relative density about 97%. X-ray diffraction data show that ...

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