Lanthanum hexaborate cathode yohereza imyuka

Ugereranije na tungsten cathodes,lanthanum hexaborate (LaB6) cathodes ifite ibyiza nkibikorwa byo guhunga electroni nkeya, ubwinshi bwa elegitoronike yangiza, kurwanya ibisasu bya ion, kurwanya uburozi bwiza, imikorere ihamye, nubuzima burebure.Byakoreshejwe neza mubikoresho bitandukanye kandi bisobanutse neza nkibikoresho bya plasma, scanning electron microscopi, imashini ya elegitoroniki ya lithographie, Auger spectroscopy, na electron probe.Umutungo shingiro waLaB6, LaB6, ni mubwoko bwa CsCI cubic primitique.Atome ya Lanthanum ifata inguni umunani za cube.Atome esheshatu za boron zigizwe na octahedron kandi ziri hagati ya cube.Inkunga ya covalent ikorwa hagati ya BB, kandi electron zidahagije mugihe cyo guhuza BB zitangwa na atome ya lanthanum.La ifite valence electron numero 3, kandi harakenewe electron 2 gusa kugirango witabire guhuza.Electron 1 isigaye ihinduka electron yubuntu.Kubwibyo, umurunga wa La-B ni umuringa wicyuma ufite umuvuduko mwinshi cyane kandi mwiza.Bitewe no guhuza covalent hagati ya atome B, ingufu zubusabane ni nyinshi, imbaraga zumubano zirakomeye, kandi uburebure bwumubano ni bugufi, bivamo imiterere ihuriweho na LaB6.Ifite ibintu bimwe na bimwe nko gukomera gukomeye, gushonga cyane, no kurwanya hafiubutaka budasanzwe.