简介：江西省黄金局获悉，江西省2月份黄金产量大幅增长。2月份全省生产黄金2291．21公斤，同比增长28．20％；2月止累计生产黄金4681．19公斤，同比增长35．21％。

简介：多层的Nb2O5部nanoporous电影被控制阳极化过程成功地在包含4的乙烯乙二醇在Nb表面上综合?vol%HF并且2?vol%H2O2电解质。nanoporous电影被地排放扫描详细描绘电子显微镜学(FESEM)，传播电子显微镜学(TEM)，和X光检查衍射(XRD)。Nb2O5部nanoporous电影与~的方面墙厚度有多层的形态学5?nm，有~的一条直径的不规则的毛孔25?nm，并且一段多达7.39?m，取决于阳极化时间。为多层的Nb的机制<潜水艇class=“a-plus-plus”>2O<潜水艇class=“a-plus-plus”>5nanoporous形成也被讨论。这些nanoporous材料能在太阳能电池，煤气的传感器，催化剂，光过滤器，和电容器的地里是很有用的。

简介：LiCoO2thinfilms,whichcanbeusedasacathodematerialinmicrobatteries,weredepositedusingradiofrequency(r.f.)magnetronsputteringsystemfromaLiCoO2targetandinanO2+Aratmosphere.ThefilmswerecharacterizedbyvariousmethodssuchasXRD,SEMandAFM.TheLiCoO2filmswereannealedinairat300,500,700and800℃respectively.Theeffectoftheannealingtemperatureonthestructure,thesurfacemorphologyandtheelectrochemicalpropertiesofthefilmswereinvestigated.TheLiCoO2thinfilmdepositedatroomtemperatureisamorphousandhassmallergrainsize.Withincreasingofannealingtemperature,thecrystallinityofthefilmsispromoted.Whentheannealingtemperatureincreasesto700℃,thefilmshaveaperfectcrystallineLiCoO2phase.TheLiCoO2thinfilmwithoutannealinghasnodischargeplateauandsmalldischargecapacity(about27μAh·cm-2μm).Thedischargecapacityincreaseswiththeincreasingofannealingtemperatureandreaches47μAh·cm-2μmforthefilmannealedwith700℃,whichalsoshowsthetypicaldischargeplateauof3.9V.ThecycleperformanceofLiCoO2thinfilmsofasgrownandannealedatdifferenttemperatureswerestudied.Inthecaseofthefilmwithoutthermaltreatment,thecapacityfadingismuchfasterthanthatofthefilmannealedatdifferenttemperature,showingabout40%capacitylossonlyafter25cycles.However,inthecaseofthefilmannealedat700℃,thecapacityreachestosteadystategraduallyandmaintainedconstantlywithcycling.After25timescycling,thedischargecapacityofthefilmannealedat700℃decreasestoabout36.9μAh·cm-2·μm,only0.8%capacitylosspercycle.

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简介：InordertoimprovethehydrogenstoragepropertiesofLiBH_4-MgH_2composite,twodifferentkindsofNb-basedcatalysts,NbCandNbF_5,wereaddedtoLiBH_4-MgH_2compositebyballmilling,andtheeffectofcatalystsonhydrogenstoragepropertiesofthemodifiedLiBH_4-MgH_2systemwasinvestigated.TheexperimentalresultsshowthatLiBH_4-MgH_2compositeisatwo-stepdehydrogenationprocess,andNb-basedcompoundscanremarkablyenhanceitsdehydrogenationkinetics.Forthecompositewithoutadditionofcatalysts,thestartingdecompositiontemperatureforthefirstdehydrogenationstepisaround320℃,andthereisalongperiodofincubationtime(around220min)fortheoccurrenceoftheseconddecompositionstepevenathightemperatureof450℃.Itneedsmorethan10htocompletethedecompositionprocessandreleasearound9wt%H_2.Afteradditionof5mol%NbF_5,thestartingdecompositiontemperatureforthefirstdehydrogenationstepisaround150℃,thereisnoincubationtimefortheseconddecompositionstep,andittakesaround40mintocompletethesecondstepandreachesatotaldehydrogenationcapacityof9.5wt%.NbF_5hasbettercatalyticeffectthanNbC.Basedonthehydrogenation/dehydrogenationbehaviorsandstructuralvariation,themechanismofcatalyticeffectwasdiscussed.

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简介：采用反应合成方法制备孔隙度为54.3%的高纯Ti3SiC2多孔材料,并研究其在400~1000°C下空气中的氧化行为。采用热重-差热分析法、扫描电镜、X射线衍射技术、能谱仪、拉曼光谱、BET比表面分析法和孔结构测试等研究Ti3SiC2多孔材料在氧化前后的氧化动力学、物相组成、微观形貌以及孔结构参数演变。结果表明:形成不同晶型TiO2氧化产物是影响Ti3SiC2多孔材料抗氧化性及孔结构稳定性的主要因素。由于氧化产物体积应力以及热应力的存在,因此,在400~1000°C试验过程中试样表面均出现开裂现象。其中,在400~600°C下形成的锐钛矿型TiO2会导致Ti3SiC2晶粒出现严重开裂,并引发快速氧化以及孔径和透气度的异常减小。600°C以上在氧化过程中主要形成金红石型TiO2,开裂现象得以缓解,但是氧化膜的外延生长大幅降低了Ti3SiC2多孔材料孔隙的连通性。

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简介：本文综述了日本几家覆铜板生产企业在新形势下在经营策略、生产基地布局、产品品种、新产品开发课题、新市场开拓等方面的新动向。

简介：AseriesofnovelAgCl/Ag2CO3heterostructuredphotocatalystswithdifferentAgClcontents（5wt%,10wt%,20wt%,and30wt%）werepreparedbyfacilecoprecipitationmethodatroomtemperature.TheresultingproductswerecharacterizedbypowderX-raydiffraction（XRD）,scanningelectronmicroscopy（SEM）,X-rayphotoelectronspectroscopy（XPS）,andultraviolet–visiblediffusereflectancespectroscopy（UV–VisDRS）,respectively.Thephotocatalyticactivityofthesampleswasevaluatedbyphotocatalyticdegradationofmethylorange（MO）underUVlightirradiation.WiththeoptimalAgClcontentof20wt%,theAgCl/Ag2CO3compositeexhibitsthegreatestenhancementinphotocatalyticdegradationefficiency.Itsfirst-orderreactionrateconstant（0.67h-1）is5.2timesfasterthanthatofAg2CO3（0.13h-1）,and16.8timesfasterthanthatofAgCl（0.04h-1）.TheformationofAgCl/Ag2CO3heterostructurecouldeffectivelysuppresstherecombinationofthephoto-generatedelectronandhole,resultinginanincreaseinphotocatalyticactivity.

简介：为了研究氧流动的影响，在TiO2薄电影的结构、光的性质上评价，玻璃上的TiO2电影被反应磁控管劈啪作响扔。微观结构和光性质被X光检查diffractometry，AFM和紫外力的发射度光谱学分别地测量。这些电影以10mL/min的氧流动率扔了的结果表演有最低粗糙和最高的发射度。到氧流动评价的更长的波长的吸收角度移动从5～10mL/min增加，然后从10～30mL/min作为氧流动率增加到更短的。乐队差距是3.38eV，它在实验是将近不变的。为在oxyge流动率的10mL/min扔的TiO2薄电影，有nano水晶的结构，它对反思考(AR)合适在太阳能电池结构系统的涂层。

简介：Mg2Ni氢存储合金的电气化学的性质上的镍涂层的效果在这份报纸被介绍。X光检查衍射(XRD)和扫描电子显微镜(SEM)技术被采用检验赤裸、Ni涂的Mg2Ni合金的水晶结构和表面形态学。合金的电气化学的性质被周期的voltammetry(CV)和电气化学的阻抗光谱学(EIS)描绘。结果显示出那Ni涂层不仅减少费用转移抵抗，而且减少为Mg2Ni合金的H原子散开抵抗。Ni涂层有效地改进了分泌物能力，这也被发现，但是减少同样综合的Ni涂的Mg2Ni合金的骑车的表演。分泌物电流在同样综合的Ni涂的Mg2Ni合金的骑车的表演上有大影响。

简介：Carbon-coatedlithiummanganesesilicate(Li2MnSiO4/C)nanoparticlesweresynthesizedbypolyolprocess.X-raydiffraction(XRD)patternsoftheobtainedmaterialsexhibitagoodfitwiththatoftheLi2MnSiO4phase.Fieldemissionscanningelectronmicroscopy(FESEM)imagesoftheobtainedsamplesshowthattheparticlesizeisonlytensofnanometers.Thehighresolutiontransmissionelectronmicroscopy(HRTEM)analysisshowsthattheLi2MnSiO4nanoparticlesaresurroundedbyaverythinfilmofamorphouscarbon.Thecompositepreparedthroughpolyolprocessshowsgoodperformanceascathodematerialsinlithiumcellsatroomtemperature.ThechargecapacityoftheLi2MnSiO4/Csamplesis219mAh/g(about1.3Li+perunitformulaextracted),andthedischargecapacityis132mAh/g(about0.8Li+perunitformulainserted)inthefirstcycleinthevoltagerangeof1.5-4.8V.Agoodcapacitycyclingmaintenanceof81.8%after10cycleswasobtained.

简介：CuO-CoO-MnO/SiO2nanocompositeaerogels被经由大音阶的第五音胶化过程和乙醇supercritical弄干技术作为先锋把tetraethylorthosilicate(TEOS)用作Cu，公司和Mn醋酸盐的Si来源，和水的答案准备。gelatination机制被原子磁性的回声(NMR)和X光检查光电子光谱学(XPS)调查。CuO-CoO-MnO/SiO2nanocompositeaerogels的微观结构和作文被扫描电子显微镜学(FE-SEM)的地排放描绘，传播电子显微镜学(TEM)，电子散光谱学(版本)和XPS。特定的表面区域，毛孔尺寸和nanocompositeaerogels的毛孔尺寸分发被Brunauer-Emmett-Teller(赌注)方法决定。产品被煤气的层析(GC)分析。结果证明CuO-CoO-MnO/SiO2nanocompositeaerogels是多孔的，与10150nm，216nm的毛孔尺寸分布，7.68nm的一种平均毛孔尺寸，和664.4695.8m2/g的一个特定的表面区域的粒子尺寸分布。在nanocompositeaerogels的转变金属的臼齿的部分是0.71%-13.77%。这种结构是有利的不仅增加装载催化剂，而且作为cocatalysts充分利用转变金属氧化物的效果；CuO-CoO-MnO/SiO2nanocompositeaerogels能在diphenyl碳酸盐的更安全、环境友好的合成和催化作用的另外的地被用作一个新奇催化剂搬运人。

简介：TheCurietemperatureof(Nd1-xPrx)2Fe14CoyBcompounds（x=0,0.2,…,1.0andy=O,2,4,6,14）hasbeendeterminedwithACinitialsusceptibilitymeasurement.ItwasfoundthatthevariationsofCurietempera-turewithxisnotlinearfory=0and14,whereasitislinearforothervaluesofy.Thelatticeconstantsof(Nd1-xPrx)2Fet14BweredeterminedbyusingX-raydiffraction.Thelatticeexpansionwasmostlyalongthecaxis,whereasthatalongthea-axisremainedpracticallyzeroforthewholeseries.ItissuggestedthatPratomsmayshowsitepreferenceinR2M14Bcompounds（M=FeorCo）.DuetothesubstitutionofCoforFe.thetendencyofsitepreferenceofPrbecomeslesspronounced,whichmaybeattributedtothedecreaseofdiffer-enceofcrystalelectricfield（CEF）actingonthetworareearthsiteswiththeintroductionofCoorFe.Incon-trasttothatofthePratoms,thesitepreferenceofCoiu（Nd（1-x）Prx）2Fe（14-y）CoyBcompoundsdoesnotdependonthecompositionoftherareearthsublattice（R=NdorPr）.

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简介：在Ce1-xDyx-ySryO2-δ体系中，研究了Dy和Se对总离子电导率的影响。在该体系中，使用麦芽糖和果胶作为有机前驱体，通过改性溶胶-凝胶工艺，在x=0.15，y=0.015，0.03和0.045的条件下，制备不同组分的导电体。采用X射线衍射谱的Rietveld拟合验证了导电体具有空间群Fm3m的立方结构。从SEM像可以看到具有明显晶界、相对均匀的晶粒。在150-500℃的温度范围和40Hz-1MHz的频率范围内，采用四探针交流阻抗法测量导电体的总离子电导率。与单掺杂的二氧化铈样品相比，Ce0.85Dy0.12Sr0.03O2-δ具有更高的电导率。

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简介：HotcompressionbehaviorofTiC–Al2O3/AlcompositeswasstudiedusingtheGleeble-1500systematatemperaturerangeof300–550°Candatstrainraterangeof0.01–10.00s-1.TheassociatedstructuralchangeswerestudiedbyTEMobservations.Theresultsshowthatstressleveldecreaseswithdeformationtemperatureincreasingandstrainratedecreasing,whichcanberepresentedbyaZener–Hollomonparameterinanexponent-typeequationwithhotdeformationactivationenergyQof172.56kJ·mol-1.Dynamicrecoveryoccurseasilywhenstrainratesarelessthan10.00s-1.Dynamicrecrystallizationcanoccuratstrainrateof10.00s-1.

简介：NanocrystallineMg2Ni-typealloyswithnominalcompositionsofMg20Ni10–xCux(x=0,1,2,3,4,massfraction,%)weresynthesizedbyrapidquenchingtechnique.Themicrostructuresoftheas-castandquenchedalloyswerecharacterizedbyXRD,SEMandHRTEM.Theelectrochemicalhydrogenstorageperformancesweretestedbyanautomaticgalvanostaticsystem.ThehydridinganddehydridingkineticsofthealloysweremeasuredusinganautomaticallycontrolledSievertsapparatus.Theresultsshowthatalltheas-quenchedalloysholdthetypicalnanocrystallinestructureandtherapidquenchingdoesnotchangethemajorphaseMg2Ni.Therapidquenchingsignificantlyimprovestheelectrochemicalhydrogenstoragecapacityofthealloys,whereasitslightlyimpairsthecyclingstabilityofthealloys.Additionally,thehydrogenabsorptionanddesorptioncapacitiesofthealloyssignificantlyincreasewithrisingquenchingrate.