China Supplier Cerium Hexaboride Powder CAS 12008-02-5 CeB6 Mtengo wa ufa Cerium Boride

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Makhalidwe aCerium Boride:

Katundu: Cerium hexaborate (CeB6, yomwe imadziwikanso kuti cerium borate, CeBix, CEBIX, nthawi zina imalembedwa ngati CeB) ndi gulu lazinthu. Cerium hexaborate (CeB6) ili ndi mawonekedwe a CsCl (anthu osavuta a cubic crystal system, okhala ndi magawo akulu omwe akuyimira Ce element). Kusiyana kwake ndikuti magulu a B6 octahedral amatenga malo a Cl, pomwe Ce amatenga malo a Cs.

Ndizitsulo za ceramic zokanira zomwe zimakhala ndi ntchito yochepa, zomwe zimapangitsa kuti zikhale chimodzi mwazinthu zodziwika bwino za cathode zomwe zimakhala ndi mpweya wambiri wa electron, komanso zimakhala zokhazikika mu vacuum. Kutentha kwa cerium hexaborate ndi 1450 ° C. Cerium hexaborate, ngati lanthanum hexaborate, imasungunuka pang'onopang'ono panthawi ya cathode.

Cathode ya CeB6 imatha kusunga mawonekedwe ake abwino kwa nthawi yayitali pa kutentha kwa 1850 K, zomwe zimapangitsa moyo wautali. Pakalipano, chifukwa cha kutentha kwake kumakhala pafupifupi 30% pang'onopang'ono kusiyana ndi lanthanum borate, chophimba cha cathode cha cerium borate chimakhala chovuta kuchotsa kuposa lanthanum borate.

Zambiri zaukadaulo za Cerium Boride:

Kugwiritsa ntchito Cerium Boride:

Cerium boride imagwiritsidwa ntchito makamaka ngati zokutira kwa ma cathodes otentha, kapena ma cathodes otentha amapangidwa mwachindunji ndi makristasi a cerium hexaborate. Cerium hexaboride (CeB6) ndi lanthanum hexaboride (LaB6) nthawi zambiri amagwiritsidwa ntchito ngati zokutira zapakali pano za cathode. Ma hexaborides ali ndi ntchito yotsika, yozungulira 2.5 eV, ndipo amalekerera kuipitsidwa kwa cathode. Cerium boride cathodes ali ndi mlingo wochepa wa evaporation kuposa lanthanum boride pa 1700 K, koma amakhala osasinthasintha pa 1850 K ndipo amakhala ndi mlingo wapamwamba wa evaporation pamwamba pa kutentha.

Cerium boride cathode imakhala ndi moyo wautali 50% kuposa lanthanum boride chifukwa cha kukana kwambiri kuipitsidwa ndi mpweya. Kuwala kwa boride cathode ndi nthawi khumi kuposa tungsten cathode, ndipo moyo wake ndi 10-15 nthawi ya tungsten cathode. Kuyesa kwina kwa labotale kwawonetsa kuti CeB6 imalekerera kwambiri zoyipa zakuwonongeka kwa kaboni kuposa LaB6. Amagwiritsidwa ntchito kwambiri m'magawo monga ma microscopes, machubu a microwave, etching electron beam, welding electron, machubu a X-ray, ndi ma electron lasers aulere.

Cerium hexaboride (CeB6) ndi zinthu za cathode zomwe zimakhala ndi ma elekitironi okwera kwambiri chifukwa cha ntchito yake yochepa. Imalimbana kwambiri ndi kuipitsa mpweya ndipo imakhala ndi moyo wautali kuposa lanthanum borate cathodes. Amagwiritsidwa ntchito kwambiri m'magawo monga ma electron microscopy, machubu a microwave, electron beam etching, electron beam welding, X-ray chubu, ndi ma electron lasers aulere. Makristalo a Cerium hexaborate agwiritsidwa ntchito bwino pama microscopes apakompyuta, kukhala zida zabwino kwambiri komanso zokhazikika.

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