Lanthanum hexaboride LaB6 ufa

Zambiri mwachidule:

Lanthanum hexaboratendi inorganic sanali zitsulo pawiri wopangidwa otsika valence boron ndi osowa zitsulo element lanthanum, amene ali wapadera galasi dongosolo ndi makhalidwe ofunika borides. Kuchokera pamalingaliro azinthu zakuthupi, lanthanum hexaborate LaB6 ndi yachitsulo chosakanizira chachitsulo chokhala ndi mawonekedwe a kristalo wa kiyubiki. Ili ndi zinthu zabwino kwambiri monga kuuma kwakukulu, kutsika kwapamwamba, malo osungunuka kwambiri, kutsika kwapakati pakukula kwamafuta, komanso kukhazikika kwamankhwala. Panthawi imodzimodziyo, lanthanum hexaborate imatulutsa kachulukidwe kakang'ono kamakono komanso kutsika kwa evaporation pa kutentha kwakukulu, ndipo imakhala ndi mphamvu yotsutsa mabomba a ion, magetsi amphamvu, ndi ma radiation. Zakhala zikugwiritsidwa ntchito mu zida za cathode, ma electron microscopy, electron beam welding Ntchito m'magawo omwe amafunikira mafunde apamwamba, monga machubu otulutsa.

 Lanthanum hexaborateimakhala ndi mankhwala okhazikika ndipo samachita ndi madzi, mpweya, ngakhale hydrochloric acid; Pa kutentha kwa chipinda, zimangogwira ndi nitric acid ndi aqua regia; Oxidation imapezeka kokha pa 600-700 ℃ mumlengalenga wa aerobic. M'malo opanda vacuum, zinthu za LaB6 zimakonda kuchita ndi zinthu zina kapena mpweya kuti zipange zinthu zotsika zosungunuka; Pakutentha kwambiri, zinthu zomwe zimapangidwira zimasungunuka mosalekeza, ndikuwonetsetsa kuti kristalo wa lanthanum hexaborate umakhala pamwamba pa utsi, potero amapereka lanthanum hexaborate yabwino kwambiri yolimbana ndi poizoni.

Thelanthanum hexaboratecathode ali otsika mlingo evaporation ndi moyo wautali utumiki pa kutentha kwambiri. Pamene usavutike mtima ndi kutentha kwapamwamba, pamwamba zitsulo lanthanum maatomu kupanga ntchito chifukwa cha evaporation imfa, pamene mkati zitsulo lanthanum maatomu komanso diffuse kuti aziwonjezera ntchito, kusunga boron chimango dongosolo osasintha. Katunduyu amachepetsa kutayika kwa evapode ya LaB6 cathode ndikusunga malo a cathode yogwira nthawi imodzi. Pa kachulukidwe womwewo wa mpweya, kuchuluka kwa mpweya wa zinthu za cathode za LaB6 pa kutentha kwakukulu kumakhala kotsika kuposa zida zonse za cathode, ndipo kutsika kwa nthunzi ndikofunikira kwambiri pakukulitsa moyo wautumiki wa ma cathode.

Ntchito:

1. Lanthanum hexaborate LaB6 cathode chuma

The mkulu umuna panopa kachulukidwe ndi otsika evaporation mlingo pa kutentha kwaLaB6 lanthanum hexaborateipange kukhala chinthu cha cathode chokhala ndi magwiridwe antchito apamwamba, pang'onopang'ono m'malo mwa ma cathodes ena a tungsten pamafakitale. Pakadali pano, madera akuluakulu ogwiritsira ntchito zida za LaB6 cathode okhala ndi lanthanum hexaborate ndi motere:

1.1 Mafakitale atsopano aukadaulo monga zida zamagetsi zamagetsi za microwave vacuum ndi ma ion thrusters m'malo aukadaulo ankhondo ndi mlengalenga, zida zowonetsera ndi zojambula zokhala ndi tanthauzo lapamwamba komanso kutulutsa kwaposachedwa komwe kumafunikira ndi mafakitale aboma ndi asitikali, ndi ma electron beam lasers. M'mafakitale apamwamba kwambiriwa, kufunikira kwa zida za cathode zokhala ndi kutentha pang'ono, kutulutsa kofanana kwambiri, kuchulukirachulukira kwapano, komanso moyo wautali zakhala zolimba kwambiri.

1.2 The electron mtengo kuwotcherera makampani, ndi chitukuko cha chuma, amafuna ma elekitironi mtengo kuwotcherera makina, elekitironi mtengo kusungunuka, ndi kudula zida ndi cathodes kuti akhoza kukwaniritsa zofunika mkulu kachulukidwe panopa ndi otsika kuthawa ntchito. Komabe, zida zachikhalidwe zimagwiritsa ntchito ma cathodes a tungsten (okhala ndi ntchito yothawira kwambiri komanso kuchuluka kwa utsi wocheperako) zomwe sizingakwaniritse zofunikira. Chifukwa chake, ma cathodes a LaB6 alowa m'malo mwa ma cathode a tungsten ndi magwiridwe ake apamwamba ndipo akhala akugwiritsidwa ntchito kwambiri pamakampani owotcherera ma elekitironi.

1.3 M'makampani opanga zida zapamwamba kwambiri,LaB6cathode imagwiritsa ntchito kuwala kwake kwakukulu, kutalika kwa moyo ndi makhalidwe ena kuti alowe m'malo mwa zipangizo zotentha za cathode monga tungsten cathode mu zipangizo zamagetsi monga ma microscopes a electron, Auger spectrometers, ndi ma electron probes.

1.4M'makampani opanga ma accelerator, LaB6 imakhala yokhazikika kwambiri motsutsana ndi bomba la ion poyerekeza ndi tungsten yachikhalidwe ndi tantalum. Zotsatira zake,LaB6ma cathodes amagwiritsidwa ntchito kwambiri mu ma accelerator okhala ndi zida zosiyanasiyana monga synchrotron ndi cyclotron accelerators.

1.5 ndiLaB6cathode angagwiritsidwe ntchito machubu kumaliseche mpweya, machubu laser, ndi magnetron mtundu amplifiers mu 1.5 kutulutsa chubu makampani.

2. LaB6, monga gawo lamagetsi muukadaulo wamakono, imagwiritsidwa ntchito kwambiri m'mafakitale achitetezo ndi chitetezo:

2.1 Electron emission cathode. Chifukwa cha ntchito yotsika ya ma elekitironi yopulumukira, zida za cathode zokhala ndi mpweya wochuluka kwambiri pa kutentha kwapakatikati zitha kupezeka, makamaka makhiristo amodzi apamwamba kwambiri, omwe ndi zida zabwino zopangira ma cathode amagetsi amphamvu kwambiri.

2.2 Gwero lowala kwambiri. Zomwe zimagwiritsidwa ntchito popanga ma microscopes a ma elekitironi, monga zosefera za kuwala, zofewa za X-ray diffraction monochromators, ndi magwero ena owunikira ma elekitironi.

2.3 Kukhazikika kwakukulu komanso magawo adongosolo a moyo wautali. Kuchita kwake kokwanira bwino kumathandizira kuti igwiritsidwe ntchito pamakina osiyanasiyana amtengo wa ma elekitironi, monga zojambulajambula za electron beam, magwero a kutentha kwa ma elekitironi, mfuti zowotcherera ma elekitironi, ndi ma accelerator, popanga zida zogwira ntchito kwambiri m'magawo a uinjiniya.

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