Dislocation Structures in a BulkPb－doped Bi－SrCa－Cu－O High Temperature Superconductor

ＤｉｓｌｏｃａｔｉｏｎＳｔｒｕｃｔｕｒｅｓｉｎａＢｕｌｋＰｂ－ｄｏｐｅｄＢｉ－ＳｒＣａ－Ｃｕ－ＯＨｉｇｈＴｅｍｐｅｒａｔｕｒｅＳｕｐｅｒｃｏｎｄｕｃｔｏｒＳｈａＷｅｉ（沙维）（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓ，ＩｍｐｅｒｉａｌＣｏｌｌｅｇｅ...     

Application of Solid Electrolyte Cells to Study of Thermodynamic Properties of RE－O－F Systems

ＡｐｐｌｉｃａｔｉｏｎｏｆＳｏｌｉｄＥｌｅｃｔｒｏｌｙｔｅＣｅｌｌｓｔｏＳｔｕｄｙｏｆＴｈｅｒｍｏｄｙｎａｍｉｃＰｒｏｐｅｒｔｉｅｓｏｆＲＥ－Ｏ－ＦＳｙｓｔｅｍｓＨｏｎｇＹａｎｒｕｏａｎｄＬｉＬｉａｎｓｈｅｎｇ（洪彦若）（李联生）（Ｕｎｉｖｅｒｓｉｔ...     

Effect of Al in Ti－microalloyed Mn－Ni－Mo welding wire on microstructure and toughness of deposited metal

ＥｆｆｅｃｔｏｆＡｌｉｎＴｉ－ｍｉｃｒｏａｌｌｏｙｅｄＭｎ－Ｎｉ－Ｍｏｗｅｌｄｉｎｇｗｉｒｅｏｎｍｉｃｒｏｓｔｒｕｃｔｕｒｅａｎｄｔｏｕｇｈｎｅｓｓｏｆｄｅｐｏｓｉｔｅｄｍｅｔａｌ￥ＴａｎＣｈａｎｇｙｉｎｇ；ＺｈａｎｇＸｉａｎｈｕｉａｎｄＳｕｎＷｅｉ...     

Mathematical Simulation of Nd and Sm Extract Separation in （Nd，Sm）Cl_3－HCL－HEHEHP－Kerosene System

ＭａｔｈｅｍａｔｉｃａｌＳｉｍｕｌａｔｉｏｎｏｆＮｄａｎｄＳｍＥｘｔｒａｃｔＳｅｐａｒａｔｉｏｎｉｎ（Ｎｄ，Ｓｍ）Ｃｌ＿３－ＨＣＬ－ＨＥＨＥＨＰ－ＫｅｒｏｓｅｎｅＳｙｓｔｅｍＨｕａｎｇＷｅｎｍｅｉ；ＹｉｎｇＷｅｉｊｕａｎａｎｄＷａｎｇＮａｉｂｉｎ（黄...     

Importance of Metal－Oxide Support Wettingandinteractions on Understanding of Physical and Chemical Behaviours of Supported Metal Catalysts

ＩｍｐｏｒｔａｎｃｅｏｆＭｅｔａｌ－ＯｘｉｄｅＳｕｐｐｏｒｔＷｅｔｔｉｎｇａｎｄｉｎｔｅｒａｃｔｉｏｎｓｏｎＵｎｄｅｒｓｔａｎｄｉｎｇｏｆＰｈｙｓｉｃａｌａｎｄＣｈｅｍｉｃａｌＢｅｈａｖｉｏｕｒｓｏｆＳｕｐｐｏｒｔｅｄＭｅｔａｌＣａｔａｌｙｓｔｓＬｉ...     

Synthesis and Characterization of Heteropoly Complexes of Indium with Metal－centred Undecatungstate Ligan

ＳｙｎｔｈｅｓｉｓａｎｄＣｈａｒａｃｔｅｒｉｚａｔｉｏｎｏｆＨｅｔｅｒｏｐｏｌｙＣｏｍｐｌｅｘｅｓｏｆＩｎｄｉｕｍｗｉｔｈＭｅｔａｌ－ｃｅｎｔｒｅｄＵｎｄｅｃａｔｕｎｇｓｔａｔｅＬｉｇａｎｄｓＷｕＱｉｎｇｙｉｎ（吴庆银）（ＬｉａｏｎｉｎｇＵｎｉｖｅｒ...     

Raman Study of Defects in SI－GaAs and Se－doped Epitaxial Layer Irradiated by 10 MeV Electrons

ＲａｍａｎＳｔｕｄｙｏｆＤｅｆｅｃｔｓｉｎＳＩ－ＧａＡｓａｎｄＳｅ－ｄｏｐｅｄＥｐｉｔａｘｉａｌＬａｙｅｒＩｒｒａｄｉａｔｅｄｂｙ１０ＭｅＶＥｌｅｃｔｒｏｎｓＷｕＦｅｎｇｍｅｉ，ＬｉＨａｉｆｅｎｇ，ＣｈｅｎＷｕｍｉｎｇ，ＣｈｅｎｇＧｕｎｇｘｕａｎｄＨ...     

Determination of Consuming Rate for Pb－Ag－Ca Anode in Preparation of Electrolytic MnO＿2 by Differential Pulse Polarography

ＤｅｔｅｒｍｉｎａｔｉｏｎｏｆＣｏｎｓｕｍｉｎｇＲａｔｅｆｏｒＰｂ－Ａｇ－ＣａＡｎｏｄｅｉｎＰｒｅｐａｒａｔｉｏｎｏｆＥｌｅｃｔｒｏｌｙｔｉｃＭｎＯ＿２ｂｙＤｉｆｆｅｒｅｎｔｉａｌＰｕｌｓｅＰｏｌａｒｏｇｒａｐｈｙＹｕＺｈｅｎｇａｎｄＹａｎｇＳｈｅｎ...     

Effects of Deformation and Heat－treatment Process on Texture of Bi－2223／Ag Su perconducting Tapes

ＥｆｆｅｃｔｓｏｆＤｅｆｏｒｍａｔｉｏｎａｎｄＨｅａｔ－ｔｒｅａｔｍｅｎｔＰｒｏｃｅｓｓｏｎＴｅｘｔｕｒｅｏｆＢｉ－２２２３／ＡｇＳｕｐｅｒｃｏｎｄｕｃｔｉｎｇＴａｐｅｓＧｕｏＸｕ；ＷａｎｇＣｈａｏｑｕｎａｎｄＹｕａｎＧｕａｎｓｅｎ（郭旭）（王超群）...     

Characterisation of a Mechanically Alloyed Oxide Dispersion Strengthened Niekel－base Superalloy

ＣｈａｒａｃｔｅｒｉｓａｔｉｏｎｏｆａＭｅｃｈａｎｉｃａｌｌｙＡｌｌｏｙｅｄＯｘｉｄｅＤｉｓｐｅｒｓｉｏｎＳｔｒｅｎｇｔｈｅｎｅｄＮｉｅｋｅｌ－ｂａｓｅＳｕｐｅｒａｌｌｏｙＳｈａＷｅｉ（沙维）ＤｅｐｅｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳｃｉｅｎｃｅａ...     

不同金属硫化物从钨酸盐溶液中除钼的效果

针对钨冶炼过程中钨钼分离这一关键问题,研究了利用CuS,CoS,NiS,PbS,FeS,ZnS和HgS等金属硫化物从钨酸盐溶液中除钼的效果.对含钼的Na2WO4或(NH4)2WO4溶液用Na2S或(NH4)2S 进行硫化处理,使其中的MoO2-4转化为MoS2-4,然后加入上述金属硫化物进行除钼.结果表明,CuS,CoS和NiS在Na2WO4或(NH4)2WO4溶液中均具有良好的除钼效果,综合考虑经济、环保等因素,认为CuS是最经济合理的钨钼分离新试剂.考察了试剂用量、反应温度和溶液pH值对除钼效果的影响,并获得了最佳除钼工艺条件,即在CuS试剂用量为理论量的3～4倍、室温下搅拌反应1h的条件下,可使溶液中的Mo从0.6～0.77g/L降至0.007～0.02g/L,除钼率达96.0%～98.5%,整个除钼过程中钨的回收率达99.75%以上.     

Na2WO4-ZnO-WO3熔盐体系的电导率

用平行四电极法研究了Na2WO4-ZnO-WO3熔盐体系在x(Na2WO4)为0.40～1.00,x(ZnO)为0～0.4,x(WO3)为0～0.50组成范围内的电导率.结果表明:体系的电导率与温度的倒数呈指数关系;体系各组元对电导率的影响规律受x(ZnO)与x(WO3)比值的控制,当该比值小于1时,用ZnO逐步替代Na2WO4将导致体系的电导率增大,用Na2WO4逐步替代WO3也将导致体系的电导率增大,用WO3逐步替代ZnO将导致体系的电导率减小;当该比值大于1时,其规律正好相反;在Na2WO4含量一定的条件下,x(ZnO)与x(WO3)的比值为1时体系的电导率最大.     

Preparation of N-Doped Bi2WO6 Microspheres for Efficient Visible Light-Induced Photocatalysis

The N-doped bismuth tungstate （BizWOt） photocatalysts with high visible light activity were prepared by the hydrothermal method using urea as a nitrogen source. The as-prepared N-doped Bi2WO6 samoles were characterized by X-ray diffraction, scanning electron microscopy, specific surface area, photocurrent analysis, and UV-Vis diffuse re- flectrance spectroscopy. The photocatalytic activity was evaluated by photocatalytic degradation of rhodamine B （RhB） solution under visible light irradiation. The photocatalytic mechanisms were analyzed by active species trapping experi- ments which revealed that the holes were the main active species of N-doped BizWO6 products in aqueous solution under visible light irradiation, rather than .OH and O-. With the assistance of H202, the photocatalytic activity for degradation of RhB could be further improved because H202 reacted with conduction band electrons to generate more hydroxyl radicals. KEY WORDS：     

WS2花形纳米晶的制备和表征

采用溶胶-凝胶法,将钨酸钠水溶液经阳离子交换树脂获得的三氧化钨溶胶与硫粉混合。在高压反应釜中于650℃加热2 h。采用扫描电镜(SEM)和粉末X射线衍射(XRD)等手段对所制备的样品进行检测分析,对纳米花晶体的制备、影响因素进行初步探讨。结果证实所得灰黑色产物是花形二硫化钨纳米颗粒,组成花的片状单晶长宽约为几十个纳米,厚度约5 nm。     

选择性沉淀法从钨酸盐溶液中除钼的工业试验

对“选择性沉淀法从钨酸盐溶液中除钼”新工艺进行了工业试验。结果表明对处理含WO3130～244g/L,含钼0.535～2.55g/L的工业钨酸铵溶液,除钼后净液中Mo/WO3达到2.00×10     

拜耳法溶出过程降低赤泥碱耗

拜耳法生产氧化铝的过程中,碱耗的主要原因是因为有钠硅渣的生成,碱耗可以用赤泥钠硅比(N/S)表征。通过对钠硅渣和水化石榴石反应行为的热力学分析,发现高饱和系数(x>1)的水化石榴石不易被苛性碱分解,低饱和系数的水化石榴石易被分解而转化为钠硅渣,且钠硅渣也可以转化为水化石榴石,而在Na2CO3溶液中,任何形式的水化石榴石均能被分解生成钠硅渣。实验研究结果表明,不同矿区的铝土矿对赤泥N/S影响不明显,母液中Na2CO3浓度升高、石灰加入量降低、母液中碱浓度降低均会导致赤泥N/S升高,引起碱耗增大。因此,降低母液中Na2CO3浓度、提高石灰添加量将明显有利于赤泥N/S的降低。     

Synthesis and reaction behavior of calcium silicate hydrate in basic system

1　INTRODUCTIONIt skeytoseparatealuminafromsilicainaluminaproductionbyBayerorsinteringprocess .Whethersilicachangestosodiumaluminosilicatehydrateorhydro garnet(bothtitleddesilicationproduct,DSP) ,bothcontainso daoralumina .IfDSPisdischargedoutdirectly ,alargeamountofsodaandaluminawillbewasted ,meanwhiledischargedDSPwillresultinheavyenvironmentalpollu tion .InpresentitcostsalottorecoveraluminaandsodafromDSPbysinteringprocess[1] .Soitisurgenttodevel opnewhydro processtechnologytorecove…     

碱浸钨矿工艺、设备与技术更新

碱浸钨矿的湿法冶金原理分析 ,使钨冶金工作者开始重视碱用量、浓度、硅酸盐、磷酸盐、铝酸盐及活性氧化物等易与钙生成溶度积低、化学稳定性强的净化沉淀试剂 ,抑制碱浸操作中液 -固分离发生返钙现象及矿浆 (Na OH - H2 O系中 )允许钨的(Na2 WO4)溶解量的重要性和实践意义。提出钨冶金工厂生产工艺、设备技术创新措施 ,并指出其发展方向。     

铜镍合金在添加不同缓蚀剂的55%LiBr溶液中的腐蚀行为

采用电化学阻抗技术研究了LiOH、Na_2MoO_4和BTA对铜镍合金在55%LiBr溶液中的腐蚀行为的影响。结果表明,单独添加LiOH和BTA都能显著减缓铜镍合金在LiBr溶液中的腐蚀,而Na_2MoO_4含量较低时可能会加速腐蚀。三种缓蚀剂复配使用,对铜镍合金在55%LiBr溶液中的腐蚀具有更好的缓蚀效果,复配后具有协同效应。试验表明,复合添加0.10 mol/L LiOH、150 mg/L Na_2MoO_4和150mg/L BTA时,对铜镍合金在55%LiBr溶液中的腐蚀具有最优的缓蚀效率。     

汽车发动机冷却液中镁合金缓蚀剂的研究

采用XRD、电化学极化曲线、化学浸泡等实验方法，研究了腐蚀性水体系中单种无机盐、复配无机盐缓蚀剂对AZ91D镁合金的缓蚀作用，并用正交优化设计确定了Na2MoO4+Na2SiO3+KMnO4复配无机盐缓蚀剂的优化配方；研究了水-乙二醇（1：1）防冻液基础液体系中缓蚀剂对AZ91D镁合金的缓蚀作用.结果表明，在腐蚀性水中KMnO4、Na3PO4、Na2MoO4和NaF对AZ91D镁合金有一定的缓蚀作用，Na2B4O7不具有缓蚀作用，有可能加速其腐蚀；复配Na3PO4+KMnO4及Na2MoO4+Na2SiO3+KMnO4对AZ91D镁合金腐蚀有缓蚀作用，而Na3PO4+Na2B4O7会加速其腐蚀.在水-乙二醇体系中，Na2S对AZ91D镁合金腐蚀有较好的缓蚀作用；确定了2种适用于水-乙二醇中的有机-无机复合缓蚀剂配方，缓蚀效率分别为98.1％和94.3％.