Xa kuthelekiswa netungsten cathodes,lanthanum hexaborate (ILaB6) ii-cathodes zineengenelo ezinjengomsebenzi wokuphuncuka kwe-electron ephantsi, ukuxinana kwe-electron ephezulu, ukuxhathisa kwibhombu ye-ion, ukuxhathisa okulungileyo kwetyhefu, ukusebenza okuzinzileyo, kunye nobomi benkonzo ende. Isetyenziswe ngempumelelo kwizixhobo ezahlukeneyo ezichanekileyo kunye nezixhobo ezinje ngemithombo yeplasma, ukuskena i-electron microscopy, oomatshini be-electron beam lithography, iAuger spectroscopy, kunye ne-electron probes. Ipropati esisiseko yeILaB6, ILaB6, yeyohlobo lweCsCI cubic primitive lattice. Iiathom zeLanthanum zihlala kwiikona ezisibhozo zetyhubhu. Iiathom ze-boron ezintandathu zenza i-octahedron kwaye zibekwe kumbindi wetyhubhu. I-covalent bond yenziwa phakathi kwe-BB, kunye nee-electron ezingonelanga ngexesha lokudibanisa phakathi kwe-BB zibonelelwa yi-athomu ye-lanthanum. I-La inenombolo ye-electron ye-valence ye-3, kunye nee-electron ezi-2 kuphela ezifunekayo ukuze uthathe inxaxheba kwi-bonding. I-electron eseleyo ibe yi-electron yasimahla. Ke ngoko, ibhondi ye-La-B sisibophelelo sesinyithi esine-conductivity ephezulu kakhulu kunye nokuqhuba kakuhle. Ngenxa ye-covalent bonding phakathi kwe-athomu ze-B, amandla ebhondi aphezulu, amandla ebhondi anamandla, kwaye ubude bebhondi bufutshane, okukhokelela kwisakhiwo esihlangeneyo se-LaB6. Ineempawu ezithile ezinjengokuqina okuphezulu, indawo ephezulu yokunyibilika, kunye nokumelana kufutshaneiintsimbi zomhlaba ezinqabileyo.
Ixesha lokuposa: Sep-28-2023