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in the frequency range of 8.2-12.4 GHz. It indicates that the electric permittivities of the prepared SiC powders have been improved by the pure Al or N doping and decrease by the Al and N co-doping..., Northwestern Polytechnical University, Xi an 710072, China摘 要:The SiC powders by Al or N doping have been synthesized by combustion synthesis, using Al powder......
that thishost was thermally and optically superior for practical applications.Strong emission centered at 1.22 μm was observed in all Tm3+ single-doped,Tm3+/Ho3+ and Tm3+/Er3+ co-doped samples with an excitation of 808 nm wavelength.The emission was attributed to the Tm3+:3H5→3H6 transition.The co-doping of Ho3+ or Er3+ largely broadened the width and slightly strengthened the intensity of the 1.22 μm......
spectra under ultraviolet (200-300 nm) radiation showed a dominant peak at 543 nm attributed to the 5D4→7F5 transition of Tb3+, which was greatly en-hanced by the co-doping of Ce3+, indicating...="ChDivSummary">Tb3+ and Ce3+ co-activated LiZnPO4 phosphors with high luminescence efficiency were synthesized by a high temperature solid-state reaction at 1000 oC for 3 h. The XRD patterns......
-doped sample was longer than that of the others. Furthermore, the co-doping samples had stronger thermoluminescence (TL) intensity and therefore longer afterglow duration. At last, the self-reduction...="ChDivSummary" name="ChDivSummary">The luminescent properties of Sr2.97MgSi2O8:Eu2+0.01 phosphors were investigated with different Ln3+0.02(Ln3+:Dy3+,Er3+,Ho3+) co-dopants. The co-dopants had no influence......
and Technology摘 要:A series of K3Gd(PO4)2:Tb3+,Sm3+ phosphors were synthesized through solid state reaction. By co-doping Tb3+ and Sm3+into K3Gd(PO4)2 host and singly varying the doping concentration of Sm3+, tunable colors from green to yellow and then to orange were obtained in K3Gd(PO4)2:Tb3+,Sm3+ phosphors under the excitation at 373 nm. The energy......
. The results show that zinc chloride improves crystallization of zinc oxide, co-doping of sulfur and chloride, formation of defects and luminescent intensity. Since chloride doping quenches the emission... by calcining zinc sulfide with zinc chloride at 800 ℃ show the highest luminescence intensity, which is explained by the co-doping chloride and sulfur due to their similar radius. Zinc chloride......
emission, or co-doping of Y and Cd enhances the UV emission, narrows the band gap of ZnO and hence red shifts the UV emission at the same time. Therefore, Y and Cd co-doped ZnO nanopowders exhibit... the emission intensity while the intrinsic emission is blue- or red-modified through doping or co-doping. In the present work, we intend to add two elements of Y and Cd into ZnO crystalline lattice......
is significantly enhanced and so are absorption coefficient and conductivity within visible region in the co-doping system. The photoabsorption capacity and photoelectrical efficiency of FeS2 are highly strengthened in Cu-Ni co-doping system. Key words: Cu-Ni doping; FeS2; optical property; first-principles calculation Foundation item: Project (51274255) supported by the National Natural Science......
solvothermal approach and further utilized to remediate toxic arsenic (As(III)) pollution. The effects of Cu/Ce elements co-doping on the crystal structure, catalytic oxidation and adsorption... of magnetic composites was proposed by co-doping Cu/Ce elements. The as-prepared magnetic Fe3O4@Cu/Ce microspheres were characterized in detail and applied to remove As(III). Characterizations and adsorption......
) was estimated from the emission spectra. The pumping efficiency and the intensity of the emission at the 1.54 μm band of Er3+ were enhanced considerably by co-doping Yb3+. Key words:Bi-based glass...Optical Spectroscopy of Er3+ and Er3+/Yb3+ Co-doped Bi2O3-GeO2-B2O3-ZnO Glasses Xia Haiping1,Zhang Jianli1,Wang Jinhao1,Zhang Yuepin1 (1.Laboratory of Photo-Electronic Materials, Ningbo University......
