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简介：Newmethodsforboththetreatmentofpulpwasteliquorcalledblackliquor(BL)andtherecoveryofchemicalsbyusingplasma,andtheconcentrationofBLwiththefreezingtechniqueweredeveloped.Thenewmethodsaimingatthepilotplantscalearedescribedandtheexperimentsinasmall-scaleresearchfacilityfordemonstrationandtestarepresented.Theenergyconsumptionfortreatingwasteliquidis1kg/kWh.Plasmaprocessingcanreducethecostsfortreatmentandeliminatepollution.

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简介：Atriggerdeviceandatriggeredpseudosparkswitch(TPSS)weredesignedbasedonsurfaceflashovertechnology,inordertomeettherequirementsfrompresentpulsepowertechnol-ogyandpulsecurrenttesttechnologysuchasalonglifetime,reliabilityinawidevoltagerange,ashortdelaytime,aswellassmalldelayjitters.Thetriggerdevicesweremadefromdifferentdielectricmaterials,withtheirpermittivitiesfromtenstothousands.ThetriggercharacteristicsofTPSSwereinvestigated.Theresultsindicatethatthehigh-dielectrictriggerdeviceshowsbetterperformanceandhigheremittedchargeoftheelectronemissionwithinalladjustedparametersincludingthegaspressureandappliedvoltage.Forthedielectricmaterialwithrelativepermittiv-ityε_rof3460,whenthegaspressureis7Pa,thehold-offvoltageofTPSSis28kV,theminimumtriggerswitchvoltagedropsto128V,theminimumdischargingdelaytimeanddelayjitterarelessthan35nsand6ns,respectively,andthereliableoperationcanbereachedwithinaverylargerangeofchargingvoltage,between0.46%and99%ofitsself-breakdownvoltage.

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简介：Moleculardynamics(MD)simulationswereperformedtoinvestigateF+continuouslybombardingSiCsurfaceswithenergiesof100eVatdifferentincidentanglesat300K.Thesimulatedresultsshowthatthesteady-stateuptakeofFatomsincreaseswithincreasingincidentangle.Withthesteady-stateetchingestablished,aSi-C-Freactivelayerisformed.ItisfoundthattheetchingyieldofSiisgreaterthanthatofC.IntheF-containingreactionlayer,theSiFspeciesisdominantwithincidentangleslessthan30o.Forallincidentangles,theCFspeciesisdominantoverCF2andCF3.

简介：Chitosan(CTS)coatingscontainedcalcium(Ca)andphosphorus(P)ontitanium(Ti)surfacearepreparedbythecathodeliquidphaseplasmatechnology(CLPT),inacertainconcentrationelectrolytesolutionwithselectiveadditionsofammoniumdihydrogenphosphateandcalciumnitrate.Itisindicatedthattheparametersforastabledischargearevoltageof400V,frequencyof100Hz,dutycycleof30%basedonalargeamountofexperimentdata.Themorphology,structureandcompositionofthecoatedsamplesarestudiedbySEM,FTIR,XRD,XPS.Theresultsdemonstratethatthecompositecoatingsareuniform,andsomesolidparticlesofinorganicsaltcontainingcalciumandphosphorusdispersedonthecoatings.CAtestsshowthatthesamplestreatedbytheliquidplasmabecamelesshydrophilic.ThevariationofhydrophilicityontheCLPTtreatedtitaniumisattributedtothechangeofthefunctiongroupsonthesamplesurface.Meanwhile,apossibleformationmechanismofthecompositecoatingsisdiscussed.

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简介：本文利用同步辐射角分辨光电子谱研究了f.c.c.Fe与Cu{111}之间的界面。观察到了位于表面布里渊区中K点附近的界面态，表明它是一个有序的界面。垂直出射的价带谱表明外来Fe原子对衬底Cu{111}的能带结构无任何影响。这与互混的Co/Cu{111}的结果不同，表明界面处不存在Fe与Cu原子之间的互混。

简介：ThisworkinvestigatedC2F6/O2/ArplasmachemistryanditseffectontheetchingcharacteristicsofSiCOHlow-kdielectricsin60MHz/2MHzdual-frequencycapacitivelycoupleddischarge.FortheC2F6/Arplasma,theincreaseinthelow-frequency(LF)powerledtoanincreasedionimpact,promptingthedissociationofC2F6withhigherreactionenergy.Asaresult,fluorocarbonradicalswithahighF/Cratiodecreased.Theincreaseinthedischargepressureledtoadecreaseintheelectrontemperature,resultinginthedecreaseofC2F6dissociation.FortheC2F6/O2/Arplasma,theincreaseintheLFpowerpromptedthereactionbetweenO2andC2F6,resultingintheeliminationofCF3andCF2radicals,andtheproductionofanF-richplasmaenvironment.TheF-richplasmaimprovedtheetchingcharacteristicsofSiCOHlow-kfilms,leadingtoahighetchingrateandasmoothetchedsurface.

简介：通过水热法合成了骨架含铁的杂原子丝光沸石，采用XRD，FT－IR及TPR等表征技术确认铁进入了分子筛骨架。利用XAFS技术对分子筛中铁的精细结构和配位环境进行了表征和计算，近边吸收的Fe-K边前跃迁证实铁在分子筛骨架中位于四面体配位环境中，与邻近原子存在共价键作用；铁－氧配位键长为0.188-0.189nm.

简介：利用Triton和高盐处理制备菠菜光合系统ⅠⅠ（PSⅠⅠ）－La复合物，并应用EXAFS技术研究了该复合物中稀土镧的局域结构。初步结果表明，镧与PSⅠⅠ中O或N原子配位，配位数为8，距离为2．5A左右；第二层配位原子是C，其作用距离为3．5A左右，配位数为4；La与Mn的作用距离4．5A，大于Ca与Mn的距离3．5A。由此推测镧与PSⅠⅠ结合后，改变了其空间结构。

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简介：应用同步辐照光源进行高温高压原位能量色散X射线衍射实验，入射X射线光束定位是关键，北京同步辐射实验室高压衍射站引入四刀光阑扫描系统，实现调光定位自动化，简化调光手续，提高实验效率，为高压衍射实验站的用户进行实验提供了方便。

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简介：用溶胶－凝胶方法合成了掺铒（掺杂浓度10^20/cm^3)的二氧化硅玻璃。在室温下可产生1.54μm波长的红外荧光。实验结果表明：荧光强度随掺杂浓度的不同而改变，并在0.5W%的掺杂浓度下出现最大值。当温度从4K升至300K时，荧光强度下降了74％。通过FT－IR和EXAFS检测，Er离子与O组成了配位数为8或9的配位结构。