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简介：ThethermodynamicphasestabilityareadiagramsofBCl3-NH3-SiCl4-H2-ArsystemwereplottedviaFactsagesoftwaretopredictthekineticexperimentalresults.Theeffectsofparameters（ie,partialpressureofreactants,depositiontemperatureandtotalpressure）onthedistributionregionsofsolidphaseproductswereanalyzedbasedonthediagrams.Theresultsshowthat：（a）Solidphaseproductsaremainlyaffectedbydepositiontemperature.TheareaofBN＋Si3N4phaseincreaseswiththetemperaturerisingfrom650to900℃,anddecreaseswiththetemperaturerisingfrom900to1200℃;（b）Whentemperatureandtotalpressureareconstants,BN＋Si3N4phaseexistsatahighpartialpressureofNH3;（c）Theeffectoftotalsystempressureiscorrelatedtodepositiontemperature.Thetemperaturerangingfrom700to900℃underlowtotalpressureistheoptimumconditionforthedeposition.（d）Appropriatekineticparameterscanbedeterminedbasedontheresultsofthermodynamiccalculation.Si–B–Ncoatingisobtainedvialowpressurechemicalvapordeposition.TheanalysisbyX-rayphotoelectronspectroscopyindicatesthatB–NandSi–Narethemainchemicalbondsofthecoating.

简介：制备出高质量纳米晶是金属氧化物纳米晶的基础研究和技术运用的首要问题.在有机溶剂中,利用一步法能够合成出较高结晶度的立方相Ga2O3纳米晶,对该样品的微观形貌和光学性能进行了表征.研究表明,利用一步法获得的纳米晶具有单分散性,晶格条纹明显,平均直径为6nm.在光学性能方面,立方相Ga2O3纳米晶在紫外区域有较宽的吸收.此外,通过提高合成温度能够从紫外到蓝光范围内调节荧光光谱.

简介：AseriesofCd1-xZnxS/K2La2Ti3O10compositesweresynthesizedviaasimpleco-precipitationmethod.ThepreparedsampleswerecharacterizedbyX-raydiffraction（XRD）,scanningelectronmicroscopy（SEM）,X-rayenergydispersivespectroscopy（EDX）,ultraviolet-visiblediffusereflection（UV-Vis）,X-rayphotoelectronspectroscopy（XPS）andphotoluminescence（PL）measurements.ThecompositestructuresconsistedofCd1-xZnxSnanoparticlesevenlydistributedonthesurfaceofK2La2Ti3O10.TheabsorptionedgeofK2La2Ti3O10shiftedtothevisiblelightregionuponintroductionoftheCd1-xZnxSnanoparticles.Thephotocatalyticactivitiesofthecatalystswereevaluatedbyhydrogenproductionundervisiblelightirradiation.ThepreparedCd0.8Zn0.2S（30wt%）/K2La2Ti3O10exhibitedhigherphotocatalyticactivity,evolving6.92mmol/gH2undervisiblelightirradiationfor3h.ThepromotedphotocatalyticactivityofthecompositeswasattributedtothesynergisticeffectbetweenCd1-xZnxSandK2La2Ti3O10,whichresultedinenhancedseparationofphotogeneratedelectronsandholes.

简介：Newvisibletransparent,UVabsorption,andhighinfraredreflectionpropertieshavebeenrealizedbydepositingmultilayerSiO2/ZnO：Al/CeO2-TiO2/SiO2filmsontoglasssubstratesatlowtemperaturebyradiofrequencymagnetronsputtering.OptimumthicknessofSiO2,ZnO：Al（ZAO）andCeO2-TiO2（CTO）filmsweredesignedwiththeaidofthinfilmdesignsoftware.Thedegreeofantireflectioncanbecontrolledbyadjustingthethicknessandrefractiveindex.TheouterSiO2filmcandiminishtheinterferencecoloringandincreasethetransparency;theinnerSiO2filmimprovestheadhesionofthecoatingontheglasssubstrateandpreventsCa2＋,Na＋intheglasssubstratefromenteringtheZAOfilm.Theaveragetransmittanceinthevisiblelightrangeincreasesbynearly18%-20%,ascomparedtodoublelayerZAO/CTOfilms.Andthefilmsdisplayhighinfraredreflectionrateofabove75%inthewavelengthrangeof10-25μmandgoodUVabsorption（〉98%）properties.Thesesystemsareeasytoproduceonalargescaleatlowcostandexhibithighmechanicalandchemicaldurability.ThetriplefunctionalfilmswithhighUVabsorption,antireflectiveandhighinfraredreflectionratewilladapttoapplicationinflatpaneldisplayandarchitecturalcoatingglass,automotiveglass,withdiminishinglightpollutionaswellasdecreasingeyefatigueandincreasingcomfort.

简介：Thedevelopmentofconvenientmethodtoobtaingraphene-basednanocompositesisakeyissuefortheirapplication.Herein,wedescribedafacilerouteforsynthesizinggraphene-Cuandgraphene-Cu2Onanocompositesusinggrapheneoxide-CuOasaprecursor.Remarkably,thedifferentnanocompositescouldbeformedjustbyvaryingthereactiontemperatureandtime.Thisworkprovidesafeasiblerouteforthepreparationofgraphene-basednanocompositeswithvariousconstituents.

简介：为了提高方镁石-尖晶石砖性能，以电熔镁砂、镁铝尖晶石、金属铝粉和板状刚玉为原料来制备方镁石-尖晶石材料。研究了金属铝粉和板状刚玉添加量对材料体积密度、显气孔率、高温抗折强度、抗热震性的影响。结果表明：随着金属铝粉加入量的增多，材料烧结性能得到提高，加入金属铝粉时材料的高温抗折强度变大，加入金属铝粉1．5％时抗热震性最好；加入板状刚玉2％时烧结性能和抗热震性最好，加入4%板状刚玉时材料的高温抗折强度最大。

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简介：Layeredcathodematerialsofhigh-temperaturelithiumbatteries,LiNi1/3Mn1/3Co1/3O2aresynthesizedbyasol-gelmethodwithvariationinfinalsinteringtemperatureforboreholeapplications.Thestructure,morphologyandhigh-temperaturedischargeperformanceoftheseresultingproductsareinvestigatedbyX-RayDiffraction（XRD）,scanningelectronmicroscopy（SEM）,laserparticlesizeanalysis,galvanostaticandpulsedischarge.Theresultsofstructuralanalysisindicatethatthesamplesinteredat800℃hasthecharacteristicsofgoodcrystallinity,narrowsizedistributionandlargespecificsurfaceareaatthesametime.Thedischargeexperimentsalsoindicatethatthissamplehasthebestelectrochemicalproperties,withthemaximumdischargecapacitiesof314.57and434.14mAh·g-1at200and300℃respectivelyandtheminimumcellinternalresistancesatbothtemperatures.

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简介：关于犀牛建模的一个问题：犀牛产品开模线怎么建．开模线怎样建才正确？接下来我们对这个问题进行探讨。首先我们来看这个图，这个就是我们最常用的构建分模线。对产品分模线的理解其实不难．在建模之前要认真观察是不是分模线．具体来说，产品分模线有两种情况。

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简介：采用脉冲激光沉积法,在Pt/SiO2/Si的基底上制备CeO2薄膜,并使用导电原子力显微镜（ConductiveAtomicForceMicroscopy,CAFM）对CeO2薄膜的局域阻变效应及其形成机制进行了研究.结果表明,CeO2薄膜具有双极性阻变特性,且复位过程中出现多阻态,限流值的大小影响开启的导电通道数量,并对其低组态阻值和开关比有显著影响.采用导电细丝模型对CeO2薄膜的阻变机制进行分析,表明氧缺位的形成及其在电压作用下的迁移是导电细丝形成和破灭的关键.

简介：以钬酸四丁酯为前驱体、硝酸银作为银源,通过合适的配比以溶胶-凝胶（Sol-gel）法制备了纯TiO2m米粉体及不同银含量掺杂的TiO2m米粉体.采用XRD、TEM等方法对样品进行形貌分析和结构表征,XRD结果表明,掺杂银和未掺杂银的TiO2纳米粉体均为锐钬矿型,平均粒径约为9-13nm,适量银的掺杂有效抑制了TiO2粉体粒径的增大以及向金红石型的相转化.光催化活性测试分析结果表明,掺银TiO2比纯TiO2对有机染料亚甲基蓝光催化降解活性有了明显提高.

简介：日本东京大学岩佐义宏教授和理化学研冗所的研冗小组置称，实验证明具有与石墨烯相同的原子构成为蜂窝状晶格结构的层状MoS2是一种优异的谷电子学意义上的新型低耗电器件用半导体材料。为降低耗电量，此前的研究集中在自旋电子方面，即半导体器件不用电荷，而是利用电子自旋，但近年来谷电子学研究比较引人注目。这是利用电子的另一个自由度“谷”，即由半导体晶体结构的对称性产生的电子流动及流动方式在左旋和右旋具有不同的性质。通过抑制因半导体结晶缺陷及杂质导致的能量损失，使电子自旋高效运动，从而减少电子器件的电力消耗。

简介：使用醋酸镍为前驱体通过一步法和成无毒的M3S2量子点.对M3S2量子点进行光致发光,XRD和透射电镜的分析表征结果表明：硫化镍在365nm的激发波长下的最大发射波长在469nm,量子点的平均粒径介于5-11nm之间.

简介：已经悄然远去的2014年，给软包装行业留下了不少难以言说的苦涩：整个行业约80％的企业业绩下滑，人力成本增加，材料供应商收紧应付款账期，资金链紧张，对于许多企业来说，外面欠着一大笔应付货款，而下游客户的货款也难以快速回笼，已是一种常态。尤其是到了年关，几乎所有的企业都在忙同一件事：收款I内外交困成为很多企业的普遍现象。

简介：Highentropyalloyhasattractedincreasingattentions.However,toenhancethealloystrengthoftenleadstoimpairmentoftheductility,orviceversa.HerewereportedaheattreatmentapproachonAlCrFeNi2Ti0.5highentropyalloy,whichcanelevatethestrengthandductilitysimultaneously.AningotofAlCrFeNi2Ti0.5weighing2.5kgwasfirstlyfabricatedbymediumfrequencyinductionmelting.Thensamplesfromthesameheightofthebulkingotwereannealedfor6hat600,700,800and1000℃,respectively.After1000℃annealing,anoptimalmicrostructurewasobtainedbyusingourapproachwhichcanmakesomeprecipitationparticlesdistributehomogeneouslyinthedendriteinteriorwhilekeeptheinterdendritestructureasasinglesolidsolutionphase.ThemechanicaltestonthisAlCrFeNi2Ti0.5alloysampleshowedthat,thecompressivefracturestrengthσbcwasincreasedbyabout600MPaandtheplasticstrainepwasdoubled,comparedwiththoseoftheas-castsample.Ourapproachcanbereadilyadaptedtolarge-scaleindustrialproductionofhighentropyalloyswithhighstrengthandductilitybyproperannealingtreatment.

简介：利用异烟酰肼和2-羟基-3-甲氧基苯甲醛（邻香草醛）合成了一种新的Schiff碱-2-羟基-3-甲氧基苯甲醛异烟酰腙（L），并制备其Cu（Ⅱ）、Cd（Ⅱ）、Zn（Ⅱ）的配合物。利用元素分析、摩尔电导、红外光谱、紫外光谱、差热分析等手段对该Schiff碱及其配合物进行了表征，得到了Schiff碱及其配合物的推测组成，并研究了配体和配合物的荧光光谱，结果表明锌和镉的配合物与配体相比具有较好的荧光特性。