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Hydrothermal synthesis of Ce: Lu_(2)SiO_(5) scintillator powders

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Journal of Rare Earths 2009年第5期27卷 801-805页

作者： YUN Ping SHI Ying ZHOU Ding xie jianjun Department of Electronics and Information Materials School of Materials Science and EngineeringShanghai UniversityShanghai 200072China

The synthesis of cerium-doped lutetium oxyorthosilicate(LSO)polycrystalline powders was investigated by a hydrothermal *** precursor was obtained by the hydrothermal reaction of Lu(NO_(3))_(3)with Na_(2)SiO_(3)at 200℃for 10 h by using urea as precipitator,fol-lowed by a calcination uader proper *** results of XRD indicated that the precursor was crystallized into A-type LSO phase at 1000℃,and transfetrred to B-type LSO phase when temperature was raised above 1050℃.After being heated at 1250℃for 2 h,single phase of B-type LSO powder was synthesized with homogeneous distribution of particle size ranging from 200 to 300 *** photolumi-nescence spectrum of as-synthesized LSO:Ce powders showed a typical broad emission peak centered at 404 nm,corresponding to the 5d^(1)-4f transition of Ce^(3+).

关键词： lutetium oxyorthosilicate scintillator hydrothermal luminescence powder rare earths

夹脊穴电针联合全杜仲胶囊治疗腰椎间盘突出症的临床疗效

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当代医学 2024年第10期30卷 17-21页

作者：周赟杨平谢建军江西医学高等专科学校第一附属医院康复科江西上饶334000

目的探讨夹脊穴电针联合全杜仲胶囊治疗腰椎间盘突出症的临床疗效。方法选取2021年4月至2022年4月江西医学高等专科学校第一附属医院收治的80例腰椎间盘突出症患者作为研究对象,采用随机分配法分为观察组(n=42)与对照组(n=38)。对照组... 详细信息

目的探讨夹脊穴电针联合全杜仲胶囊治疗腰椎间盘突出症的临床疗效。方法选取2021年4月至2022年4月江西医学高等专科学校第一附属医院收治的80例腰椎间盘突出症患者作为研究对象,采用随机分配法分为观察组(n=42)与对照组(n=38)。对照组采用全杜仲胶囊治疗,观察组在对照组基础上联合夹脊穴电针治疗。比较两组临床疗效、视觉模拟评分法(VAS)评分、日本骨科协会(JOA)评分、腰椎屈曲活动度、直腿抬高角度、患侧屈伸肌肌力比值(H/Q)及血清炎症因子[肿瘤坏死因子-α(TNF-α)、白细胞介素-1β(IL-1β)、白细胞介素-6(IL-6)]、血浆单胺类物质[5-羟色胺(5-HT)、5-羟吲哚乙酸(5-HIAA)、钠(NA)]水平。结果观察组治疗总有效率为97.62%,高于对照组的81.58%,差异有统计学意义(P<0.05);治疗后,观察组VAS评分和TNF-α、IL-1β、IL-6、5-HT、5-HIAA、NA水平均低于对照组,JOA评分高于对照组,腰椎前屈活动度、后伸活动度、直腿抬高角度及60°/S与180°/S患侧H/Q值均大于对照组,差异有统计学意义(P<0.05)。结论夹脊穴电针联合全杜仲胶囊治疗腰椎间盘突出症的临床疗效显著,可有效缓解患者疼痛,改善腰椎屈曲活动度、直腿抬高角度、患侧屈伸肌肌力,降低血清炎症因子、血浆单胺类物质水平,值得临床推广应用。

关键词：夹脊穴电针全杜仲胶囊腰椎间盘突出症

Theoretical Studies on Vibrationally Assisted Adsorption of H_(2)on Cu(100)Surface

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Chinese Physics Letters 1995年第10期12卷 637-640页

作者： xie jianjun JIANG Ping ZHANG Kaiming Fudan-T.D.Lee Physics Laboratory Fudan UniversityShanghai 200433 State Key Laboratory of Applied Surface Physics Fudan UniversityShanghai 200433

Trajectory simulations are carried out for vibrationally assisted adsorption of H_(2)on Cu(100)*** potential-energy surfaces for H_(2)approaching the copper surface in any molecular orientation are obtained by using the embedded-atom *** is clearly shown that the vibrational energy of incident H_(2)greatly promotes the dissociation by assisting H_(2)to surmount the activation barrier at the reaction *** dependence of initial sticking coefficient S0 for H_(2)activated adsorption on Cu(100)surface on the normal incident translational energy EN has been *** different contributions from H_(2)(v=0)and H_(2)(vn=1)to the sticking probability of H_(2)molecular beam adsorption on Cu(100)are *** results are in well agreement with the experimental observations and other theoretical calculations.

关键词： surface. method. adsorption

Lower temperature synthesis of cerium-doped polycrystalline lutetium pyrosilicate powders by a novel sol-gel processing

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Science China(Technological Sciences) 2014年第8期57卷 1610-1615页

作者： FAN LingCong XU Jian SHI Ying xie jianjun LEI Fang Department of Electronics and Information Materials School of Materials Science and EngineeringShanghai University

A novel sol-gel processing was developed to synthesize polycrystalline cerium-doped lutetium pyrosilicate （Lu2Si2O7Ce, LPS ：Ce） powders under low temperature. It was found that the addition of propylene oxide （PPO） could promote the formation of Lu-O-Si bonds in precursor, which was beneficial to the formation of LPS phase. X-ray diffraction （XRD） patterns indicated that the single-phased LPS powder was well crystallized at 1050℃. Microstructure observation demonstrated that the synthetic LPS powder was composed of ellipsoidal grains with the mean size of 40 nm. The luminescent properties were characterized by photoluminescence （PL）, X-ray excited luminescence （XEL） and vacuum ultraviolet （VUV） spectroscopy at room temperature. The synthetic LPS：Ce powder emitted a broad emission spectrum centered at about 380 nm, which should be ascribed to the 5d→4f transition of Ce3＋. Decay time of the synthetic LPS：Ce powder was measured to be only 32 ns.

关键词： lutetium pyrosilicate sol-gel synthesis luminescence

液相色谱-串联质谱法快速测定化妆品中游离的乙醇胺类物质

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日用化学工业（中英文） 2024年第5期54卷 614-620页

作者：曾广丰王志元谢建军王璐侯颖烨董洁广州海关技术中心广东广州510623 国家化妆品质量安全检测重点实验室(广州) 广东广州510623

建立稳定同位素稀释-液相色谱-串联质谱法(LC-MS/MS)测定化妆品中游离的3种乙醇胺类物质。样品经异丙醇提取后,使用乙腈和0.1%甲酸-水溶液(体积分数,下同)梯度洗脱,Kinetex HILIC色谱柱分离,电喷雾电离源正离子模式电离,多反应监测模式... 详细信息

建立稳定同位素稀释-液相色谱-串联质谱法(LC-MS/MS)测定化妆品中游离的3种乙醇胺类物质。样品经异丙醇提取后,使用乙腈和0.1%甲酸-水溶液(体积分数,下同)梯度洗脱,Kinetex HILIC色谱柱分离,电喷雾电离源正离子模式电离,多反应监测模式进行测定。采用单因素试验优化得到最佳前处理条件:提取溶剂为异丙醇、超声波提取、提取时间为20 min、不改变样品pH直接提取。使用内标法曲线定量,一乙醇胺、二乙醇胺和三乙醇胺内标曲线分别在5.0~200,2.0~200和1.0~200μg/L范围内线性关系良好,相关系数R^(2)大于0.999,平均回收率范围在87.1%~97.0%,相对标准偏差(RSDs)在1.68%~6.57%之间,方法检出限为3.00~15.0μg/kg,定量限为10.0~50.0μg/kg。建立的方法适用于61批次化妆品样品的检测。该方法操作简便,定量准确,回收率稳定、灵敏度高、精密度高,适用于测定化妆品中的乙醇胺类物质。

关键词：液相色谱-串联质谱法快速测定化妆品乙醇胺

Synthesis of polycrystalline γ-AlON powders by novel wet chemical processing

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Science China(Technological Sciences) 2012年第12期55卷 3405-3410页

作者： LEI JingXuan MA FeiZhong SHI Ying xie jianjun HU Wei SHI ZhiWei Department of Electronics and Information Materials School of Material Science and EngineeringShanghai UniversityShanghai 200072China Ceramic Department Shanghai FRP Research Institute Co.Ltd.Shanghai 201404China

The synthesis of polycrystalline aluminum oxynitride （AlON） powders was investigated by the carbothermal reduction and ni- tridation （CRN） of amorphous precursor obtained by wet chemical processing. Co-precipitation processing was employed to achieve amorphous precursor from AI（NO3）3 solution dispersed by nanosized carbon particles, which was composed of AI（OH）3 and C particles homogeneously. The effects of the content of carbon black, pH value, and calcination temperature on formation of A1ON phase were investigated by means of XRD, SEM and TEM, respectively. It was found that single phase AION powder could be synthesized when the resultant precursors were calcined at 1750℃ for 2 hours under flowing N2. Un- der optimal additional content of C （5.6wt%）, the resultant A1ON powders exhibited the primary particle size of about 1-3 μm with a specific surface area of 3.2 m2/g, which were superior to that of carbothermal reduction of immediate mixture of γ-A1203/C powders.

关键词： aluminum oxynitride (AION) co-precipitation processing the content of carbon black pH value calcination temperature

Influence of reaction parameters on the luminescence properties of monodisperse NaGd((1-x-y))(WO4)2:xEu3+,yTb3+ phosphor by molten salt synthesis

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Journal of Rare Earths 2018年第1期36卷 49-57页

作者： Weiqin Xiao Luqiao Yin Jipeng Zhou Fang Lei Ying Shi jianjun xie Lei Zhang School of Materials Science and Engineering Shanghai University Key Laboratory of Advanced Display and System Applications Ministry of Education (Shanghai University)

Eu3+activated and Eu3+, Tb3+co-activated monodisperse sodium double tungstates NaGd(WO4)2 phosphors were prepared by molten salt method at 750 ℃ for 10 h using NaCl as a flux. The crystal structure and morphology of the as-synthesized phosphors were measured by XRD and SEM, respectively. The photoluminescence properties were characterized by PL spectra, decay lifetime and CIE. The presence of NaCl plays an important role in the morphology and luminescence properties. In this work,NaCl and one of the raw material Na2CO3in a certain proportion will form a low eutectic salt to decrease the reaction temperature and benefit the formation of monodisperse NaGd(WO4)2crystals. The color of Eu3+and Tb3+co-doped NaGd(WO4)2phosphors can be tuned from creamy white to orange, red and green by adjusting the doping concentration of rare earth ions, since the emission contain the broad blue-green emission origin from NaGd(WO4)2host and characteristic red and green emission origin from Eu3+and Tb3+ions. The electroluminescent spectra and CIE measurement shows that the LED device with NaGd((1-x))(WO4)2:xEu3+(x = 0.24) phosphor can be excited by 365 nm and 380 nm LED chip, and their CIE coordinate is(x = 0.45, y = 0.45) and(x = 0.36, y = 0.37), Ra is 80.3 and 86.3, Tcis 3196 and4556 K, respectively. As a single-component phosphor, NaGd(WO4)2:Eu3+,Tb3+have potential application in UV-pumped WLEDs.

关键词： NaGd(1-x-y)(WO4)2:xEu3+ yTb3+ Molten salt method Single component WLEDs White light

Study on Factors Affecting Properties of Foam Glass Made from Waste Glass

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Journal of Renewable Materials 2021年第2期9卷 237-252页

作者： Yang Liu jianjun xie Peng Hao Ying Shi Yonggen Xu Xiaoqing Ding School of Material Science and Engineering Shanghai UniversityShanghaiChina Huichang New Material Co. Ltd.XuanchengChina Changda Thermal Insulation Technology Co. Ltd.XuanchengChina

Foam glass is a new green material to make use of waste glass and is popular for its energy-saving and light weight *** problems in the current study of foam glass is that its properties require improvement to match the growing demands of application specific *** of foam glass is related to its porous structure,which is affected by various *** influence of raw material component,foaming agents and sintering system on the porous structure and properties of foamed glass is *** decreases with the decrease of quartz and barite *** conductivity is more affected by barite content,and the lowest thermal conductivity is obtained when 10%quartz and 6%borax are *** strength is more affected by borax content,and the highest compressive strength is obtained when 5%quartz,10%barite and 6%borax are *** glass samples with different porous structures and improved properties are obtained using graphite and CaCO3 as foaming *** with the soldcommercial foam glass for thermal insulation materials,the compressive strength of samples prepared by using compound foaming agents is increased by a factor of 2–3 times *** porous structure and properties adjusted by the optimization of raw materials and foaming agent,there exists the potential for factories to produce foam glass with expanded application scope.

关键词： Foam glass waste glass orthogonal test properties

A novel Eu^(3+)-doped phosphor-in-glass for WLEDs and the effect of borophosphate matrix

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Journal of Rare Earths 2023年第2期41卷 190-199页

作者： Teng Ma Haohong Chen Luqiao Yin Fang Lei Ying Shi jianjun xie Lei Zhang Lingcong Fan School of Materials Science and Engineering Shanghai UniversityShanghai 200444China Key Laboratory of Transparent Opto-functional Inorganic Materials Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 201899China Key Laboratory of Advanced Display and System Applications Shanghai UniversityShanghai 200072China

Phosphor-in-glass(PiG)is a potential color convertor for high power WLEDs.A novel glass matrix with advanced performance is still a ***,Eu^(3+)doped glass matrix has attracted much consideration mainly due to its red compensation.A new borophosphate matrix to realize Eu^(3+)red light was designed in the Na_(2)O-ZnO-P_(2)O_(5)-B_(2)O_(3)-Eu_(2)O_(3)***,a series of PiGs composed of different concentrations of Y3Al5O12:Ce phosphor and the matrix were also fabricated by *** crystallization of Eu^(3+)based phosphate offers a novel red emission quenching apart from normal concentration quenching in the glass *** direct energy transfer but only little reabso rption occurs between Eu^(3+)and Ce^(3+)*** Ce^(3+)concentration effect is obvious on the electroluminescent *** optimized color rendering index of 79.7,the CIE coordinates near natural white and the range of CCT from 3943 to 6097 K were obtained for the packaged white light emitting diodes(WLEDs)together with the excellent CCT stability higher than about 97.5%and the quadruple thermal conductivity than that of silicon *** work implies borophosphate glass based PiGs with fine transparence and energy conversion efficiency are promising for excellent WLEDs,while the LED by using the PiG sample without any yellow phosphor doped is of high color purity and has a potential use as the 465 nm blue source.

关键词： Phosphor-in-glass Eu^(3+)ion Borophosphate glass WLEDs YAG:Ce Rare earths