Luminescence Properties of Eu2+ Doped Ca-α-SiAlON Phosphor
Eu2+ Doped Ca-α-SiAlON phosphor have been synthesized from SiO2,Al2O3,CaCO3, Eu(NO3)3 carbon powders by carbothermal reductionnitridation (CRN) . Using X-ray Diffractometer (XRD) and fluorescent spectrophotometer. the influences of the phase content of the sintered samples after different soaking time at 1390℃ and their luminescence properties were studied. The pure Ca-α-SiAlON:Eu2+ were prepared at processing temperatures of 1390℃ in a holding time of 8 h. Ca-α-SiAlON:Eu2+ had high adsorption in the UVvisible spectral region. Two bands were observed in the emission spectrum centered at about 459 and 545 nm exited at 290nm. And two excitation bands located at about 297nm,300-400nm were observed in the excitation spectrum with monitored at emission wavelength of 469nm or 550nm respectively. The morphology of the samples was examined via SEM, TEM. Ca/Eu co-doped α-SiAlON powders had hollow sphere morphology and it is composed of large numbers of very fine panicles of around 30 to 70 nm in diameter. Elemental distribution was investigated using an EDS attached to a scanning electron microscopy (SEM). The sintered sample has a composition commonly seen for α-SiAlON.
Ca-α-SiAlON Phosphor Luminescence LED
Li Li Zhang Cheng Feng Tao Xu Haifeng Li Qiang
Depratment of Chemistry, East China Normal University,Shanghai 200062,China Department of Materials Science and Engineering, Shanghai Institute of Technology, Shanghai 00235,Ch Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai,200050,China
国际会议
Frist Annual Meeting on Testing and Evaluation of Inorganic Materials(第一届全国无机材料测试与评价学术年会)
南昌
英文
277-280
2010-04-28（万方平台首次上网日期，不代表论文的发表时间）