超临界直流锅炉控制

介绍了超临界直流锅炉的启动系统结构特点,主要功能、,贮水箱水位控制原理和控制模块,阐述了超临界直流锅炉给水控制的概念和控制原理,以及控制回路的相互影响,为超临界机组的运行和调试提供了理论基础.     

几种典型电子垃圾大物料量热重实验及机理研究

在自行设计的实验室规模的热重分析装置上进行了较大物料量(15.g左右)的热重实验,研究了几种典型电子垃圾组分(电线、键盘和废电路板)的热解行为和特性,热解过程采用氮气作载气,升温速率为20.K/min,热解终温为1,073,K.所得实验结果同常规热重分析仪(微热重)的实验结果进行比较,发现大物料量热重相对于微热重存在热滞后效应.此外,采用最概然机理函数选择法,提出了各种电子垃圾组分(电线、键盘和废电路板)微热重和大物料量热重热解的机理函数,分析获得了电线、键盘和废电路板不同热解方式下的表观活化能E和指前因子A.     

太阳能吸附制冷用复合吸附剂制备及其吸附机理探讨

以乙醇为吸附质，选取13X分子筛、凹凸楱土和氯化锶等为主要吸附材料．通过混合法制备了一系列有着优良吸附能的复合吸附剂。测定了乙醇在主要吸附材料和自制复合吸附剂上的吸附量，用TG-DTA法对主要吸附材料的热稳定性和自制吸附剂DTA脱附乙醇峰端温度进仃了分析.对吸附剂原料复合比例和扩孔剂种类等制备条件进行了实验研究。结果表明：自制复合吸附剂比单一吸附材料对乙醇确着更大的吸附能力；DTA分析的脱乙醇峰端温度明显低于单一吸附材料；加入扩孔剂E1或E2，可增加自制复合吸附剂孔容和孔径，改善其吸附性能；自制复合吸附剂对乙醇的吸附量显著高于活性炭。其中，M4-0003和M1-0001复合吸附剂对乙醇的平衡吸附量约为活性炭的2．5～4倍；M1-0001—乙醇工质对的吸附制冷量是活性炭—乙醇的2～6倍。对吸附剂复合的机理初步探讨表明：增加复合吸附剂弱吸附中心数，可降低其脱附温度。     

PECVD淀积氮化硅薄膜性质研究

使用等离子体增强化学气相沉积(Plasma Enhanced Chemical Vapor Deposition，PECVD)在P型硅片上沉积了氮化硅(SiNx)薄膜，使用薄膜测试仪观察了薄膜的厚度、折射率和反射光谱，利用扫描电子显微镜(SEM)，原子力显微镜(AFM)观察了截面和表面形貌，使用傅立叶变换红外光谱仪(FTIR)和能谱仪(EDX)分析了薄膜的化学结构和成分。最后，考察了薄膜在经过快速热处理过程后的热稳定性，并利用霍尔参数测试仪(Hall)比较了薄膜沉积前后载流子迁移率的变化。     

煤矸石盐酸浸溶出铝铁的动力学研究（英文）

The extraction of aluminum from coal mining waste (CMW) is an important industrial process. The two major problems in applications are low aluminum dissolution efficiency and high iron content in the raw material, which affect the quantity and quality of products. To improve the aluminum recovery process, the leaching kinet-ics of CMW with hydrochloric acid was studied. A shrinking core model was used to investigate aluminum and iron dissolution kinetics. Based on the kinetic characteristics, a process for recovering aluminum was proposed and tested experimental y. It is found that the aluminum leaching reaction is controlled by surface reaction at low temperatures (40–80 °C) and by diffusion process at higher temperatures (90–106 °C). The iron dissolution process is dominated by surface reaction at 40–100 °C. The results show that iron could be dissolved or separated by concentrated hydrochloric acid. Fine grinding wil improve aluminum dissolution significantly.     

双功能受阻胺光稳定剂GW-540与紫外线吸收剂并用效应的研究

本文用IR、UV、SEM等方法,研究了双功能基受阻胺光稳定剂——三(1,2,2,6,6-五甲基-4-哌啶基)亚磷酸酯(GW-540),与紫外线吸收剂UV-531、UV-327并用时对聚丙烯的防光作用,结果表明:GW-540-UV-531并用体系有良好的防光作用,呈强的协同效应;GW-540-UV-327并用体系呈弱的对抗作用。结果还表明:GW-540对531和327的光分解均有保护作用.电镜研究表明,加入GW-540后,使UV-327在聚丙烯中分散更不均匀,从而影响其效率的发挥。文中提出了两个体系的协同和对抗作用机理。     

Synthesis, Crystal Structures and Fluorescence Properties of Two One-Dimensional Cadmium(II) Coordination Polymers Containing Flexible Bis(benzimidazole) Ligands

Two one-dimensional Cd(II) coordination polymers constructed by ribbon-like molecules, {[Cd(L₁)₂(NO₃)]·NO₃} _n (1) (L₁ = 1,3-bis(5,6-dimethylbenzimidazol-1-yl)benzene) and [Cd(L₂)₂(NO₃)₂] _n (2) (L₂ = 1,3-bis(benzimidazol-1-yl)benzene) have been obtained through assembly of the two structurally similar flexible bis(benzimidazole)-based ligands and cadmium nitrate tetrahydrate. The cadmium(II) centers display different coordination environments with trigonal-bipyramidal geometry in 1, and a octahedral geometry in 2. Weak C–H···O interactions in 1 result in a two-dimensional supramolecular layer; two π–π interactions are present in 2 forming a three-dimensional supramolecular network structure. The solid state fluorescence properties of 1 and 2 were investigated.     

High lumen density of Al2O3-LuAG: Ce composite ceramic for high-brightness display

Thermally robust and highly efficient green-emitting luminescent ceramics are gradually attracting great attention as promising phosphors using in high-brightness laser phosphor display to reduce serious speckle noise as well as high cost. However, lumen density is still seriously restricting their potential applications especially under high-power density laser due to insufficient absorption of blue laser and significant thermal quenching. Here, we report an Al₂O₃-LuAG: Ce composite ceramic phosphor (CCP) for high-brightness laser phosphor display. Owing to good optical properties and high thermal conductivity of Al₂O₃, the Al₂O₃-LuAG: Ce CCP shows high photoluminescence quantum yield (79.6%), low thermal quenching (only 3.2% loss in luminescence at 200°C), and high thermal conductivity (18.9 W·m⁻¹·K⁻¹). Moreover, the Al₂O₃, as scattering centers, enhances the Rayleigh–Mie scattering of the blue laser, and hence the absorption of the Al₂O₃-LuAG: Ce CCP exhibits a remarkable improvement (~2.3 times) at 450 nm. Finally, with optimized thickness (0.3 mm) of Al₂O₃-LuAG: Ce CCP, an excellent luminous efficiency (216 lm·W⁻¹) and outstanding lumen density (6129 lm·mm⁻²) of the green-emitting light source was obtained by driving under a high-power density (28.33 W·mm⁻²) blue laser. All of those validate the suitability of the Al₂O₃-LuAG: Ce CCP for high-brightness display.     

热镀铝锌钢板辊压成形后表面发黑原因分析

采用场发射扫描电镜及其配备的能谱仪,并结合钝化膜单位面积质量和表面粗糙度检测,对热镀铝锌方管表面发黑的原因进行了分析。结果表明：热镀铝锌钢板在辊压过程中外力较大,对钝化膜的破坏性较强,钝化膜因此而变薄,失去保护作用,甚至方管表面部分钝化膜脱落而露出铝锌镀层,加工过程中产生的摩擦热使镀层发生氧化,且钢板与模具摩擦造成钝化膜分布不均匀,产生色差,导致镀铝锌方管发黑。     

铁-氧电池法预处理头孢类抗生素生产废水

用铁-氧电池,对含有高浓度有机物的头孢类抗生素生产废水进行预处理试验,研究了若干因素对其COD去除率和可生化性的影响.结果表明:对于含有高浓度有机物的头孢类抗生素生产废水,该法是十分有效的预处理手段,COD去除率可达73%,废水由难生化转变为易生化,BOD5/COD由0.22提高到了0.53.