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简介:TheK2Ti4O9whiskerswerechosenforthecatalystcarrier,TiO2/potassiumtitanatephotocatalystwaspreparedbySol-gelmethod.TheproductwascharacteratedbyX-raydiffractionandSEM.EDSshowsthat,themainpeckincludedTi,O,andKinpotassiumtitanatewhisker.ThemainpeakofKdisappearedandthepeaksofTi,Ostayedafterwhiskerwascovered.ItdirectedthatthesurfaceofsamplewascoveredbyTiO2.XRDshowsthatdiffractionpeakappeared,whichwascorrespondedtothepeakofanataseTiO2.Inthereactiondeviceofphotochemistry,usingmiddle-pressuremercurylampasillumination,rhodamineBassimulantpollutant,thephotocatalyticperformanceofTiO2/potassiumtitanatewasstudied.Underthesameconditions,thelowerpH,thelargerilluminance,thehighertemperature,thegreateraerationquantumandthelowerinitialconcentrationofrhodamineB,thehigherdecolorationratewasgot.Underourexperimentconditions:pH6,theilluminanceof250W,thetemperatureof313K,andtheaerationquantumof2.0L/min.WhentheconcentrationofrhodamineBwas8mg/LThephotocatalystofTiO2/potassiumtitanatewas0.01g/L.ThedecolorationrateofTiO2/potassiumtitanatedealtwiththerhodamineBreachover95%in160min,andcomparewithTiO2,thedecolorationrateofrhodamineBwasimproved0.50~1.91multiple.TiO2/potassiumtitanatecanbeusedtotreatmentofdyewastewater.
简介:HistoricaldataregardingZhangHeng'sseismoscopeisnotsingularproof.Actually,thefourearliesthistoricaldocuments,i.e.,ContinuationofHistoriographyofHanDynasty,HistoriographyoftheLaterHan,BookoftheLaterHanandDingRecordallhaverelevantrecordsofitsstructure,size,principle,responsetoearthquakeandactualapplications.Thesefiveaspectsaresupportedbyarchaeologicalresearch,unearthedculturalrelics,historicalearthquakesandmodernseismologicalstudy.Thesehistoricalmaterialscontainagreatdealofspecificinformationaboutthisancientseismoscope.Inconclusion,theauthenticityandreliabilityofZhangHeng'sseismoscopeareverified.
简介:Thecavitatedbifurcationprobleminasolidspherecomposedoftwocompressiblehyper-elas-ticmaterialsisexamined.Thebifurcationsolutionforthecomposedsphereunderauniformradialtensileboundarydead-loadisobtained.Thebifurcationcurvesandthestresscontributionssubsequenttothecavita-tionaregiven.Therightandleftbifurcationaswellasthecatastropheandconcentrationofstressesareana-lyzed.Thestabilityofsolutionsisdiscussedthroughanenergycomparison.
简介:为稳固的氧化物的NiO/SDCcomposites和Ni/SDC金属陶瓷造成房间(SOFC)阳极应用程序从氧化镍(NiO)被准备,samaria做了由粉末冶金学的粉末处理的二氧化铈(SDC)。NiO/SDCcomposites和Ni/SDC金属陶瓷的物理、机械的性质,以及微观结构被调查。NiO/SDCcomposites和NiO内容的sintering温度在决定NiO/SDCcomposites的微观结构和性质起一个重要作用,这被显示出,接着,它影响Ni/SDC金属陶瓷的微观结构,电的传导性,和机械性质。Thepresent学习表明了那篇作文并且(进程参数必须适当地被选择优化微观结构,为稳固的氧化物的NiO/SDC材料的性质造成房间应用程序。
简介:Asamanifestationoftheunderlyingphysicalnature,quailtumoscillationswiththeappliedmagneticfield(B)areoneofthemostimportanttopicsincondensedmatterphysics.Theresearchhistorycanbetrackedto1930whenLevShubnikovandW.J.deHaasobservedShubnikov-deHaas(SdH)oscillationsinthemagnetoresistance(MR)ofbismuthcrystals.Sincethen,researchershaveobservedquantumoscillationsindiversematerials,includingmetals,metalliccompounds,semimetals,semiconductorsandeveninsulators,aswellasinartificialmesoscopicmicrostructures.Nowadays,quantumoscillationdetectedbymagnetotransportinvestigationhasbeenapowerfultooltodetectthephysicalpropertiesinsolid-statesystems.
简介:(2)OtherMagneticMaterialsREGiantMagnetostrictiveMaterials(GMM)ResearchofGMMinChinastartedsince1980sbutdevelopedrapidly.Theproductscanbeproducedinbatchestoday.However,applicationofsuchmaterialsinapparatusislaggardthandevelopedcountries.GMMmaterialsaremainlyappliedinstepmotors,linearactuators,ultrasonicsystems,sonarsystems,valves,precisecontrols,activevibrationdampingetc.Itisestimatedthatthenear10yearswillbethefastdevelopingperiodofglobalGMMmarket.GlobalproductionofGMMmaterialsduring1989to2005islistedinTable3.
简介:Onthebasisoftheexistingfundamentalsolutionsofdisplacements,furtherimprovementismade,andthenthegeneralfundamentalsolutionsofbothplaneelasticandplaneplasticproblemsforortho-tropicmaterialsareobtained.Twoparametersbasedonmaterialconstantsα1,α2areusedtoderivetherele-vantexpressionsinarealvariableform.Additionally,ananalyticalmethodofsolvingthesingularintegralfortheinternalstressesisintroduced,andthecorrespondingresultsaregiven.Ifα1=α1=1,alltheexpres-sionsobtainedfororthotropycanbereducedtothecorrespondingonesforisotmpy.Becausealltheseexpres-sionsandresultscanbedirectlyusedforbothisotropicproblemsandorthotmpicproblems,itisconvenienttousetheminengineeringwiththeboundaryelementmethod(BEM).
简介:Theeffectsofdilatationalphasetransformationonthetargetstrengthofceramicmateri-alsareinvestigatedbasedonTate’smodel.Theconstitutivebehaviorofmaterialsindifferentregions(elastic,cracked,plasticandphasetransformation)aretakenintoaccount.Itisfoundthat,withaproperchoiceofmaterialparameters,thedilatationalphasetransformationcanincreaseeffectivelythetargetstrengthR_t.Thiswouldbeofimportanceinpenetration-resistancedesign.
简介:Thefeasibilityofthetechnologieshasbeendiscussedinthepaperthatbambooisusedformiddlingandtop-gradebuildingconstruction,architecturedecorating,andothermajorapplications.Thecontentincludesthecurrentapplicationofbamboomaterialsinconstructionfield;thebamboobearingmaterialtechnologicalprocesssuchasthelaminatedbambooboard,bamboomatplywoodprocesses;bambooceilingandwallmaterialtechnologiessuchasthebambooparticleboard,cement-bondedbambooparticlebo...
简介:构造沼泽地(CW)是包括沼泽地植被,土壤,和他们在对待废水帮助的联系微生物引起的集合利用自然系统的设计系统。由象强风炉子炉渣(BFS)那样的CW底层材料的铵氮(NH+4-N)的运动吸附,沸石,ceramsite,蛭石,石子,稻土壤,红土壤,和草地,用批实验和运动吸附等温线被调查。Freundlich和Lang-muir等温线能足够地预言NH+4-N吸附过程。NH+4-N的最大的吸附能力,从兰米尔等温线估计了,是评价:沸石(33333.33mgkg1)>草地(29274.01mgkg1)>BFS(5000mgkg1)>蛭石(3333.33mgkg1)>石子(769.23mgkg1)>稻土壤(588.24mgkg1)>红土壤(555.56mgkg1)>ceramsite(107.53mgkg1)。底层材料的一些性质包括体积密度,比重,水力的电导率,一致性系数(K60),弯曲系数(Cc),有机物,pH,可交换(或活跃)Cu,Fe,Zn和Mn,全部的Cu,和Fe,Mn,Zn,Cd,Pb和Ca,与NH+4-N的有的否定关联吸附。底层材料的另外的性质喜欢D10,D30和D60(分别地,10%,30%和60%基于积聚的频率粒子在通过筛的底层材料的粒子尺寸的直径)的粒子直径价值,阳离子交换能力(CEC),可交换(或活跃)Ca和Mg,和全部的K和Mg与NH+4-N有积极关联吸附。另外,象全部的Na一样的活跃K和Na与NH+4-N吸附有重要积极关联。这个信息将为为CW的合适的底层材料的选择是有用的。
简介:以便理解材料的粘弹性,这研究被进行了理论上学习粘弹性的瑞利波浪的繁殖特征。一个模型在粘弹性的中等表面上为超声的搏动的激光产生被介绍。指了凯尔文模型,频率方程和粘弹性的瑞利的正常排水量波浪被导出,分散和变细上的粘弹性的模量的影响被讨论。从理论计算,瑞利波浪的变细上的粘弹性的效果在它的分散上多于那,这被显示出。在弱粘性的情况中,粘弹性的瑞利波浪的变细与粘性模量直接成正比;效果砍变细上的粘性是多于体积粘性的大部分。粘弹性的瑞利波浪的短暂反应也用Laplace和Hankel倒置变换被模仿,它在对理论上的预言的好同意被显示出。模型为媒介的粘弹性的参数的决心提供一个有用工具。