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简介：Inordertorealizetheco-firingwithAg/Pdelectrodesinmultilayerdevices,Pb(Zn1/3Nb2/3)1-,-yZrxTiyO3(0.25＜x＜0.35,0.25＜y＜0.35)piezoelectricceramics(hereafterdesignatedPZN-PZT)modifiedbyLa2O3hasbeenpreparedbyconventionaltechniquewithsinteringtemperaturefrom1100℃to1140℃.X-raydiffractionpatternsdemonstratedthatpureperovskitephasewasobtained.Secondaryelectronimage(SEI)showedthatcrystallinegrainsinceramicswerewellgrown.d33ofmanufacturedsamplewasashighas560×10-12C/N.kpwasabout0.61andtgδabout30×10-3.TheexistenceofliquidphaseexaminedbyelectrondiffractioninPZN-PZTsampleisbeneficialtosinteringoftheceramic.

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简介：ThetransportpropertiesintheLa2/3(Ca1-xSrx)1/3MnO3(x=0,1/3,2/3)filmspreparedusingtheRFmagnetronsputteringmethodwereinvestigated.TheeffectoftheCa,Srdouble-dopingattheApositionintheLa2/3A1/3MnO3onthestructureofthetargetsandtransportofthefilmshasbeenstudied.Withtheincreaseofx,thestructuresofthetargetstransformfromtherhombohedralphasetothecubicphase;themetal-insulatorphasetransitiontemperature(Tp)ofthefilmsincreases;andthecorrespondingpeakresistivitydecreases.Allthephenomenacanbequalitativelyexplainedbythelatticeeffect.

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简介：CH3SiCl3(山)-H2-Ar系统被使用了原文如此与化学蒸汽免职(CVD)准备电影在这份报纸的方法。为三个方面原文如此拍摄，对生长率，表面粗糙，厚度和相对密度的一些重要影响由山一致性带了主要与运动始於西班牙的纸牌赌博carlo(KMC)被讨论了方法。模拟结果证明与不同免职温度为到山(H2/MTS)的H2的摩尔比率有某个规模。当山一致性增加时，生长率和三个方面的表面粗糙都增加关系，它表明近似线性。当增加三方面厚度的趋势显然是不同的时，三个方面的厚度也增加。尽管三个方面的相对密度都增加，增加的趋势与山一致性增加显示出小差别。

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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.

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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.

简介：TheRamanspectraof3%(molefraction)Y2O3-ZrO2(3Y)areobtainedatdifferenttemperaturefrom77Kto853K.Theresultsshowthat260cm-1Egand460cm-1Egmodesonthespectrashifttowardlowerwavenumberwiththeincreaseoftemperature;meanwhile,thecontinuityoftheHalfWidthatHalfMaximum(HWHM)andwavenumber(frequency)ofRamanbandsarebrokenandt-phaseonlypartiallytransformstom-phaseat523K.Basedontheexperimentalresults,thispaperdiscussesthet-phaselatticevibrationof3YandpresentstheimagesofvibrationdisplacementofsixRaman-activemodesfort-phaseofZrO2.TheanalysisindicatesthattherearediversitiesexistinginthedisplacementoftheatomicvibrationofRaman-activemodesbecauseoftheirdifferentsymmetriesatvarioustemperature,whichleadstothedifferentchangetendenciesofRamanbands.Furthermore,theabruptchangesofsomeRaman-activemodesindicatingtheatomicdisplacementareassumedtobethecondensationsofphononmodesinthet→mphasetransition.

简介：(1-x)La_(0.67)Ca_(0.33)MnO_3/Cr_2O_3(LCMO)+xCr_2O_3composites被一个新液相方法综合。XRD和SEM大小表明在LCMO结构和LCMO的晶格常数可溶的很少Cr_2O_3几乎没变化，当大多数Cr_2O_3在谷物边界或在LCMO谷物的表面上是分布式的时。Inresistivity对温度大小，金属--绝缘体转变被观察什么时候x<0.20。抵抗力增加和金属--绝缘体转变温度与Cr_2O_3的增加的内容减少。一个随机的电阻器网络(KRN)模型被使用，到模仿混合样品的运输性质。模拟结果同意试验性的观察。结果证明方法为理解maganite的composites的电子运输是合理的。

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简介：据利马近日消息，南方铜业公司的投资者关系部主管RaulJacob目前称，今年全球铜需求将增加3％，需求将超越供应。RaulJacob称，预计今年全球铜供应增幅仅为0．5％，从而令市场出现550，000吨的供需缺口。

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简介：以油酸（OA）作为表面修饰剂，在乙醇一水体系中合成了油酸修饰的LaF3：Tb3＋纳米粒子（OA—LaF3：Tb3＋），用红外光谱（IR）、X-射线衍射分析（XRD）、透射电镜（TEM）、紫外光谱（UV）、荧光光谱（FS）对所合成的纳米粒子进行了表征和荧光性能研究，结果表明，OA与纳米粒子发生了化学键合作用；所制备的纳米粒子在三氯甲烷中的溶解性很好；纳米粒子大小均匀，粒径约为10nm；纳米粒子的晶相为LaF，的六方体结构；在312nm紫外光激发下，纳米粒子发射Tbn的特征荧光，表明表面修饰剂OA对Tbn具有较好的敏化作用。

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