掺锆纳米TiO2制备表征及其对光催化活性的影响

本文采用溶胶-凝胶法制备纳米二氧化钛和掺锆二氧化钛粉末.TGA表征分析发现掺锆后二氧化钛吸附水量增加.SEM和BET表征显示掺锆粒子半径减小,比表面积增加.XRD分析发现掺锆后的衍射峰宽化,晶粒变小,与SEM和BET结果吻合,还发现掺锆抑制了二氧化钛晶相转变.光催化降解亚甲基蓝结果表明,当锆掺杂浓度在5%,焙烧温度530℃时,掺锆二氧化钛催化活性最高.     

硫酸选择性浸出含钴铜物料的研究

对由失效锂离子电池焙烧制备的含钴铜物料进行物相分析和硫酸选择性浸出。对浸出温度、浸出时间、硫酸初始浓度、搅拌转速、液固比等影响钴和铜浸出率的因素进行了条件试验,同时分析了浸出机理,钴和铜之间的相互作用有利于钴的浸出与铜的沉淀分离。得到了选择性浸出钴的优化工艺参数:使用1 mol/L硫酸,浸出温度60℃,浸出时间2 h,搅拌转速200 r/min,液固比20∶1(mL/g)。在优化条件下进行了重复试验,钴和铜平均浸出率分别为95.3%和0.37%,钴铜分离系数达到21.4,选择性浸出钴效果较好。     

掺杂的阳离子缺陷型磷灰石 La9.33－2x/3MxSi6O26 (M=Mg,Sr,Ca)的合成及离子导电特性

Apatite-type lanthanum silicate with special conduction mechanism via interstitial oxygen has attracted considerable interest in recent years. In this work, pure powder of La9.33－2x/3MxSi6O26 (M＝Mg, Ca, Sr) is prepared by the sol-gel method with sintering at 1000°C. The powder is characterized by X-ray diffraction (XRD) and scan-ning electron micrograph (SEM). The apatite can be obtained at relatively low temperature as compared to the con-ventional solid-state reaction method. The measurements of conductivity of a series of doped samples La9.33－2x/3MxSi6O26 (M＝Ca, Mg, Sr) indicate that the type of dopant and the amount have a significant effect on the conductivity. The greatest decrease in conductivity is observed for Mg doping, following the Ca and the Sr doped apatites. The effect is ultimately attributed to the amount of oxygen interstitials, which is affected by the crystal lat-tice distortion arising from cation vacancies.     

二氧化碳的高温吸附剂及其吸附过程

分析了CO2对全球气候变化的影响和减排的必要性,介绍了CO2的基本特性和主要分离方法;针对电厂烟道气流量大、温度高的特点,着重比较了用于CO2高温吸附的多种物理吸附剂和化学吸附剂的吸附性能,主要包括活性炭、沸石分子筛、金属氧化物、水滑石类混合物和锂盐化合物;重点讨论了用于高温烟道气中CO2吸附的新型吸附剂Li2ZrO3的吸附性能及影响因素,如CO2吸附速率、反应温度、ZrO2颗粒大小、改性化合物的种类和用量等;认为Li2ZrO3是从高温烟道气中吸附CO2的高效吸附剂;强调了吸附过程与分离过程的综合考虑是减排CO2未来的重点研究方向。     

电镀污泥多金属资源化利用研究

针对含铬电镀污泥开展多金属资源化利用工艺研究。结果表明,电镀污泥采用硫酸浸出,Lix984N萃取铜,沉淀剂沉铬,氧化沉铁,硫化钠沉锌,碳酸钠沉镍,在优化试验条件下,铜、镍、锌和铬回收率均大于96%。     

A型分子筛支撑膜的研究进展

简述了国内外A型分子筛支撑膜的发展概况及近年来A型分子筛支撑膜的制备技术进展,简要介绍了原位水热合成法、二次生长法、微波加热合成法及蒸汽相转移法;重点讨论了采用不同形状支撑体(如片状、管状和中空纤维多孔支撑体等)制备A型分子筛支撑膜的研究状况,着重探讨了α-Al2O3中空纤维支撑A型分子筛膜的特点和优势,并对其具体应用和工业化前景做了简要述评和展望。     

氧基电解质La_(10-x)V_x(SiO_4)_6O_(3+x)的制备及性能测试(英文)

Apatite-lanthanum silicate has attracted considerable interest in recent years due to its high oxide ion conductivity.In this paper,V-doped samples La10-xVx(SiO4) 6O3+x(0≤x≤1.5) were prepared by sol-gel method and the influences of V-dopant content on calcining temperature and conductivity were reported.The samples were characterized by thermal analysis(TG-DSC) ,X-ray diffraction(XRD) and scanning electron micrograph(SEM) . The apatite was obtained at 800°C,a relatively low temperature in comparison to 1500°C with the conventional solid-state method.The ceramic pellets sintered at 1200°C for 5 h showed a higher relative density than La9.33Si6O26 pellets sintered at 1400°C for 20 h.The conductivities of samples were measured by electrochemical impedance spectroscopy.The conductivity was improved with the increase of V-dopant content on La site.     

油滴建盏的烧制工艺

建窑始建于晚唐五代,两宋时期至元代末期,为中国著名的八大瓷窑。此时的建盏产品属于中国陶瓷历史上的一朵奇葩,它与宋朝的文化有着千丝万缕的联系,还对茶文化的发展和繁荣起到了推动作用,得到了很多皇帝和诗歌的称赞。建盏产品既具有浓郁的东方艺术的神秘感,又具有鲜明的民族美学特色,既是中国文化的瑰宝,也是在世界范围内产生的一种影响力,并在全球范围内获得较高的知名度。     

硬岩松动爆破加综掘机下山联合掘进

1概述丰龙矿业有限责任公司丰龙矿井设计生产能力为0.9Mt/a。矿井采用立井开拓方式,共有5个井筒,工业广场内布置主立井与副立井,在南、北翼布置南翼进、回风立井井筒及北翼西回风立井井筒。共划分二个水平,其中一水平为-900m,二水平为-1100m。井筒落底后从-900m水平向北施工北翼上仓胶带斜巷,按-16°下山施工,在掘进过程中巷道要穿过侏罗系下统门口山组、三叠系下统大冶组,距离472m,岩石富含石英,节理不发育,经湖南勘测设计院试验检测中心化验,岩石