共查询到20条相似文献,搜索用时 15 毫秒
1.
Emission mechanism of Mo-Y_2O_3 cathode 总被引:6,自引:3,他引:3
1 INTRODUCTIONMo Y2 O3isanewkindofrareearth molybde numthermioniccathodematerials[1].ItisexpectedtosubstituteradioactiveW ThO2 cathodematerialsinthefuture .Sincethemiddleof 1 970s,peoplehavemainlydoneresearchononekindofrareearth molyb denumcathode—Mo La2 O3cathode[… 相似文献
2.
张迈生 《稀有金属(英文版)》2000,19(4)
1 IntroductionAlkalineearthsulfidehavebeenfoundtobetheexcellentvertatilehostmaterialsfortheapplicationsofthecathodo ,pho to ,thermo andelectro luminescentphos phors[1].However ,ingeneral ,theywerepreparedbymeansoftheconventionalhightemperaturesolidstatereacti… 相似文献
3.
1 INTRODUCTIONAsoneofthealternativesofThO2 Wcathode ,La2 O3 Mothermioniccathode (La Mo)appearedinrecent 30 years[1~ 4 ] .Althoughthiscathodehasgoodemissivity ,ithasnotbeenusedcommerciallybecauseofitspooremissionstability[5~ 8] .Themicrostructurestudyonthiscathodesho… 相似文献
4.
1 INTRODUCTIONThereliabilityofsolderjointsisoneofthecriti calissuesinSurfaceMountTechnology (SMT )field[1~ 3 ] .Themoresevereserviceenvironmentalconditionsofelectronicdevicesinautomotiveapplica tion ,andthedevelopmentofadvancedinterconnec tiontechnologiesfora… 相似文献
5.
XrayPowderDifractionDataandStructuralParametersforCompoundNdFe0.6Sb2ZengLingmin,QinWenandWuShiwei(曾令民)(覃文)(吴世伟)InstituteofMa... 相似文献
6.
C. M. Liu) K. Abiko) M. Tanino) ) Schoolof Materials Metallurgy Northeastern University Shenyang China ) Institute for Materials Research Tohoku University Sendai Japan 《金属学报(英文版)》1999,12(4):637-644
1.IntroductionSisoneofthemostdeleteriousimpuritiesinsteelsbecauseitcausesintergranularfailure(IGF)notonlyatlowtemperaturesbutalsoatelevatedtemperatures.ThedeleteriouseffectofSisgenerallyinhibitedbyadditionofMnwhichprecipitateSasMnS.Indeed,additionof… 相似文献
7.
沙维 《稀有金属(英文版)》1994,(3)
EnthalpyofReactionsinY-Ba-Cu-OSystemShaWei沙维(Departmentof.MaterialsScienceandMetallurgy,UniversityofCambridge.U.K.)Received17... 相似文献
8.
《中国有色金属学会会刊》2001,(3)
TheTransactionsofNonferrousMetalsSocietyofChina(hereafterTrans .NonferrousMet.Soc .China) ,foundedin 1991andsponsoredbyTheNonferrousMetalsSocietyofChina ,ispublishedbimonthlyandmainlycontainsreportsoforiginalresearchwhichreflectthenewprogressesinthefieldofno… 相似文献
9.
《中国有色金属学会会刊》1998,(2)
INFORMATIONFOROVERSEASCONTRIBUTORSTheTransactionsofNonferousMetalsSocietyofChina(hereafterTrans.NonferrousMet.Soc.China),foun... 相似文献
10.
《中国有色金属学报》2002,(4)
《中国有色金属学报》和《TransactionsofNon ferrousMetalsSocietyofChina》是中国科学技术协会主管、中国有色金属学会主办的 2种学术性期刊 ,双月刊 ,国内外公开发行。本刊被SCIE、EI、CA、MR、РЖ、SA等国际性文 相似文献
11.
《中国有色金属学报》2002,(2)
《中国有色金属学报》和《TransactionsofNon ferrousMetalsSocietyofChina》是中国科学技术协会主管、中国有色金属学会主办的 2种学术性期刊 ,双月刊 ,国内外公开发行。本刊被SCIE、EI、CA、MR、РЖ、SA等国际性文 相似文献
12.
1 INTRODUCTIONSelf propagatinghigh temperaturesynthesis(SHS)orcombustionsynthesis ,wasdevelopedbyMezhanovetalinthe 196 0’s .Comparedtotradition almethods,itsadvantagesincludehigh purityofproducts ,lowenergyrequirement ,rapidreactionandsimplicityofprocess[1] .Beca… 相似文献
13.
沙维 《稀有金属(英文版)》1995,(4)
ScanningElectronMicroscopyStudiesofYBa_2Cu_3O_(7-δ)SuperconductorsShaWei(沙维)(DepartmentofCivilEngineering,TheQueen′sUniversit... 相似文献
14.
RoastReactionKineticsofBastnasiteConcentratewithSodiumCarbonateMixtureLiuZhaogang(柳召刚)BaotouResearchInstituteofRareEarth,Baot... 相似文献
15.
1 INTRODUCTIONThroughoutthecastingoperation ,moldfillingplaysaveryimportantroleincastingqualitycontrol.Manyofthecastingdefectscanberelatedtothefluidflowphenomenainvolvedinthisstageoftheopera tion .Ithasbeennotedthatthepropergatingdesigniscrucialtoachiev… 相似文献
16.
X.L.Zhao) T.L.Guo) M.Ohkohchi) T.Okazaki) S.Iijima Y.Ando) ) Japan Science Technology Corporation Department of Physics Meijo University Shiogamaguchi Tempaku ku Nagoya Japan ) Scientific Research Department Sh 《金属学报(英文版)》1999,12(4):345-352
1.IntroductionMultiwalledcarbonnanotubes(MWNTs)werefoundbyoneofthepresentauthors(S.Iijima)〔1〕insidethecathodedeposits,whichwereobtainedbyanotherauthor(Y.Ando)〔1,2,3〕asbyproductsoffullereneproductionusingaDCarcdischargeevaporationininertgas.TheMWNTsc… 相似文献
17.
《中国有色金属学会会刊》1995,(3)
EditorialCommitteeofTransactionsoftheNonferrousMetalsSocietyofChina¥//Chairman:HeBoquanProfessorVice-Chairman:ChenJiayongRese... 相似文献
18.
1-IntroductionSinceDupiusetal[1,2]showedthatmetalorganicvaporphaseepitaxy(MOVPE)couldbeusedforthefabricationoflasersandsolarcells,MOVPEhasdevelopedintoamaturetechniqueforthegrowthofawidevarietyofsemiconductordevicematerials[3].Oneoftheadvantagesofth… 相似文献
19.
《中国有色金属学会会刊》1995,(1)
EditorialCommitteeofthe《TransactionsofNonferrousMetalsSocietyofChina》Chairman:He,BoquanProfessorVice-Chairman:Chen,JiayongRes... 相似文献
20.
1 IntroductionChemicalreactionamongmetalsandmetalswithceramicsunderhigh energymechanicalmilling (MM)havebeenwide lystudied[1~ 3] .Untilnow ,solidreactionsbetweenmetaloxidesunderMMhavebeenhardlystudied .ZnFe2 O4isakindofspinelferrite ,whichisgenerallysynthe sized… 相似文献