碱渣湿式氧化处理技术应用现状与发展

简要叙述了碱渣的来源与组成,概述了国、内外石油、石化行业碱渣的主要处理技术及其应用情况,重点介绍了当今世界上以湿式氧化工艺为代表的几种主要的碱渣处理方法的工艺特点及应用现状。为我国碱渣处理技术的工业应用提供参考,并提出了今后的研究重点。     

Spectroscopic investigations on Er3+/Yb3+-doped oxyfluoride glass ceramics containing YOF nanocrystals

Spectroscopic properties of Er3+/Yb3+-doped transparent oxyfluoride borosilicate glass ceramics containing YOF nanocrystals were systematically investigated. X-ray diffraction (XRD) confirmed the formation of YOF nanocrystals in the glassy matrix. Based on the Judd-Ofelt theory, the intensity parameters Ωi (i=2, 4, 6), spontaneous emission probability, radiative lifetime, radiative quantum efficiency and the effective emission bandwidth were investigated. The upconversion luminescence intensity of Er3+ ions in the glass ceramics increased significantly with the increasing crystallization temperature. The transition mechanisms of the green and red upconversion luminescence were ascribed to a two-photon process, and the blue upconversion luminescence was a three-photon absorption process.     

Preparation and photoluminescence of Eu-doped oxyfluoride borosilicate glass ceramics

Eu-doped transparent oxyfluoride borosilicate glass ceramics containing Ba2GdF7 nanocrystals were prepared by controlling crys-tallization of melt-quenched glass fabricated under a reductive atmosphere.In the oxyfluoride borosilicate glass ceramics,the mean crystal size of Ba2GdF7 nanocrystals was about 30 nm,which could be observed by X-ray diffraction(XRD) and transmission electron microscopy analysis.The photoluminescence spectra of the samples excited at 392 nm showed that,besides the characteristic sharp emissions of Eu3+ ions,a very intense broadband emission of Eu2+ ions centered at 450 nm appeared.The photoluminescence intensity of Eu3+ and Eu2+ ions in the glass ceramics was much stronger than that in the as-made precursor.The long decay lifetimes of Eu3+ and Eu2+ ions evidenced the partitions of Eu3+ and Eu2+ ions into the Ba2GdF7 nanocrystals.The energy transfer from Gd3+ ions to Eu3+ and Eu2+ ions was confirmed by the excita-tion and emission spectra.     

乙烯裂解气碱洗废碱液处理技术的开发及工业应用

介绍了乙烯裂解气碱洗废碱液处理技术的开发及工业应用情况。开发的以湿式氧化(WAO)技术为核心的"湿式氧化-酸化中和"处理技术,工业化装置运行稳定,出水S2-小于1 mg/L、COD去除率大于93%,达到设计要求。该套装置的成功应用,实现了乙烯废碱液处理技术和装置的国产化,为企业清洁生产提供了技术保障,社会效益和经济效益显著。     

白光LED用Y3Al5O12:Mn4+红色荧光粉的发光性质（英文）

用高温固相反应法制备了Mn4+掺杂的Y3Al5O12荧光粉。研究了其发光性质。在467nm光激发下,这种荧光粉发出红光。主要的发射峰位于643和670nm,均属于Mn4+的5E→4A2跃迁。Mn4+的最佳掺杂浓度为1mol%。Y3Al5O12:0.01Mn4+荧光粉的色坐标值(0.701,0.299)位于红色区域。监测670nm发射得到的激发光谱由峰值分别位于410,450,468,474,482和494nm宽激发带组成,归属于Mn4+的4A2→2T2,4T2激发跃迁。测得了670nm荧光衰减曲线,得到了对应Mn4+浓度为0.001,0.005,0.01,0.03,0.05的样品相应的荧光寿命分别为1.35±0.07,1.14±0.06,1.09±0.05,0.87±0.04,和0.63±0.04ms。这些结果表明在制备白光LED过程中在Y3Al5O12:Ce3+荧光粉中能添加Y3Al5O12:Mn4+红色荧光粉而显著改善白光LED器件的显色指数。     

溶胶凝胶法制备磷酸锆钠陶瓷材料

以Zr(NO3)4.5H2O、NH4H2PO4和NaNO3为原材料,采用溶胶凝胶法合成了磷酸锆钠(NaZr2(PO4)3)陶瓷粉体,采用TG-DTA,XRD和SEM测试方法对粉体性能进行了表征,研究了烧结温度和pH值等反应条件对粉体合成的影响.结果表明,要获纯的磷酸锆钠粉体,合成温度需控制在800～1 000℃之间,其中最合适合成温度为900℃左右.前驱体pH值对合成温度基本没有影响,但会影响产物微观形貌.当合成温度为900℃,pH值为9时可以制备出团聚较少、颗粒均匀、分散性较好且平均粒径为100nm的磷酸锆钠粉体.     

共享存储可重构计算机软硬件通信的优化实现探讨

随着信息技术的不断完善和发展,计算机已经成为生活和工作当中不可缺少的一部分,借助计算机进行数据的处理和优化,能够在很大程度上提高信息处理的效率.在计算机进行数据处理的过程当中,人们对于计算机处理数据的效率以及使用性能有了越来越多的要求.所以可重构器件得到了快速的发展,共享存储可重构计算机软硬件通信逐渐成为国际计算机领域新的风向标.可重构器件不仅能够实现多编程任务,同时还具有良好的硬件电路计算效率高的性能,使修正工作更加的灵活,并且还能够使软件任务和硬件任务同时共存于同一设计系统当中,实现信息的共享和通信,打破了传统计算机软硬件不能协同设计的问题.本文将对共享存储可重构计算机软硬件通信进行详细的探讨.     

Cr~(4+)掺杂Zn_2SiO_4透明微晶玻璃光谱特性

采用高温熔融法和热处理制备了Cr~(4+)掺杂β-Zn_2SiO_4微晶玻璃。通过吸收光谱测试发现,Cr~(4+)在β-Zn_2SiO_4微晶玻璃中处于低的晶体场环境中。推导了Cr~(4+)在β-Zn_2SiO_4微晶玻璃的Racah参数,得到其能级位于~1E和~3T能级交点附近,在808 nm的二极管激发下,在Cr~(4+)掺杂β-Zn_2SiO_4微晶玻璃中可观察到中心波长位于1342nm,半高宽285nm的近红外宽带发射峰,该发射可归于Cr~(4+)在β-Zn_2SiO_4微晶低的晶体场格位的发射。     

石油化工废碱液处理技术开发及工业应用

介绍了石油化工行业产品精制过程中废碱液处理技术的开发及工业应用情况。针对不同种类废碱液的水质组成和特点,开发了以湿式氧化(WAO)技术为核心的配套处理技术,包括催化汽油精制废碱液"湿式氧化-酸化脱酚-SBR"、乙烯精制废碱液"湿式氧化-酸化中和"、丙烷脱氢制丙烯废碱液"加碱中和-湿式氧化-酸化中和-蒸发除盐"等一系列典型石油石化工业废碱液的处理技术。已建成多套废碱液湿式氧化处理装置,可以完全脱除废碱液的恶臭气味,社会效益和经济效益显著。     

Luminescent properties of SrSi2N2O2:Ce3+,Tb3+-a potential phosphor for white light emitting diodes

Ce3+ and Tb3+ co-doped SrSi2N2O2 phosphors were prepared by solid-state reaction. The X-ray diffraction pattern exhibited that the phosphor consisted mainly of oxygen-rich SrSi2N2O2. The optical properties of SrSi2N2O2:Ce3+, SrSi2N2O2:Tb3+ and SrSi2N2O2:Ce3+,Tb3+ were studied, respectively. The emission intensity of Tb3+ at 541 nm was remarkably enhanced by Ce3+ in SrSi2N2O2:Ce3+,Tb3+ phosphor, which was attributed to the energy transfer from Ce3+ to Tb3+. The chromaticity coordinates of phosphors were investigated as a function of Tb3+ concentration. When the Ce3+ and Tb3+ concentrations were 0.02 and 0.18 mol per formula unit, respectively, the chromaticity coordinate was (0.257, 0.337) in the CIE 1931 chromaticity diagram. SrSi2N2O2Ce3+,Tb3+ phosphors could be used for white light emitting diodes.