The nanowires of Y 2O 3∶Eu 3+ phosphor were synthesized by using AAO template method. By the observation of the SEM images,the characteristics of morphologies between Y 2O 3∶Eu 3+ nanowires and Al 2O 3 nanowires pro...The nanowires of Y 2O 3∶Eu 3+ phosphor were synthesized by using AAO template method. By the observation of the SEM images,the characteristics of morphologies between Y 2O 3∶Eu 3+ nanowires and Al 2O 3 nanowires produced by etching the empty AAO template was compared. The results of the SEM image analysis indicate that each nanowire is composed of a lot of agglutinating nanoparticles. At the same time,the Y 2O 3∶Eu 3+ nanowires were confirmed by EDX and PL spectra. The results of the XRD and SAED show that Y 2O 3∶Eu 3+ nanowires are mainly composed of polycrystalline materials with a cubic phase.展开更多
A kind of fine and quasi-spherical Y2O3:Eu3+ phosphor was prepared by firing a preparative precursor at 1 200 ℃ for 2 h with the molten salts of Na2CO3, S and NaCl. The precursor was obtained by homogeneous precipita...A kind of fine and quasi-spherical Y2O3:Eu3+ phosphor was prepared by firing a preparative precursor at 1 200 ℃ for 2 h with the molten salts of Na2CO3, S and NaCl. The precursor was obtained by homogeneous precipitation of yttrium and europium with oxalic acid when using EDTA, citric acid or starch as complexant. The structure and morphology of the phosphors were characterized by XRD and SEM, respectively. The influence of complexing environment, firing temperature and molten salts on formation of the phosphor Y2O3:Eu3+ was discussed. The result show that the prepared Y2O3:Eu3+ phosphor is of quasi-spherical structure with size of 2-3 μm. Its luminescent intensity is 30% higher than that of the same phosphor prepared by the same procedure but without molten salts, and is 5% higher than that of commercial Y2O3:Eu3+ red phosphor.展开更多
文摘The nanowires of Y 2O 3∶Eu 3+ phosphor were synthesized by using AAO template method. By the observation of the SEM images,the characteristics of morphologies between Y 2O 3∶Eu 3+ nanowires and Al 2O 3 nanowires produced by etching the empty AAO template was compared. The results of the SEM image analysis indicate that each nanowire is composed of a lot of agglutinating nanoparticles. At the same time,the Y 2O 3∶Eu 3+ nanowires were confirmed by EDX and PL spectra. The results of the XRD and SAED show that Y 2O 3∶Eu 3+ nanowires are mainly composed of polycrystalline materials with a cubic phase.
基金Project(50372086) supported by the National Natural Science Foundation of China
文摘A kind of fine and quasi-spherical Y2O3:Eu3+ phosphor was prepared by firing a preparative precursor at 1 200 ℃ for 2 h with the molten salts of Na2CO3, S and NaCl. The precursor was obtained by homogeneous precipitation of yttrium and europium with oxalic acid when using EDTA, citric acid or starch as complexant. The structure and morphology of the phosphors were characterized by XRD and SEM, respectively. The influence of complexing environment, firing temperature and molten salts on formation of the phosphor Y2O3:Eu3+ was discussed. The result show that the prepared Y2O3:Eu3+ phosphor is of quasi-spherical structure with size of 2-3 μm. Its luminescent intensity is 30% higher than that of the same phosphor prepared by the same procedure but without molten salts, and is 5% higher than that of commercial Y2O3:Eu3+ red phosphor.
