Ha ho bapisoa le li-tungsten cathodes,lanthanum hexaborate (LaB6) li-cathode li na le melemo e kang mosebetsi o fokolang oa ho phonyoha ha elektronike, matla a elektronike a phahameng a emission, ho hanyetsa libomo tsa ion, ho hanyetsa chefo e ntle, ts'ebetso e tsitsitseng, le bophelo bo bolelele ba tšebeletso.E sebelisitsoe ka katleho lisebelisoa le lisebelisoa tse fapaneng tse nepahetseng haholo joalo ka mehloli ea plasma, microscope ea elektrone e hlahlobang, mechini ea electron beam lithography, Auger spectroscopy, le li-electron probes.Thepa ea motheo eaLaB6, LaB6, ke ea mofuta oa CsCI cubic primitive lattice.Liathomo tsa Lanthanum li lula likhutlong tse robeli tsa cube.Liathomo tse tšeletseng tsa boron li etsa octahedron 'me li fumaneha bohareng ba cube.The covalent bond e thehoa pakeng tsa BB, 'me li-electrone tse sa lekaneng nakong ea tlamahano pakeng tsa BB li fanoa ke athomo ea lanthanum.La e na le nomoro ea elektronike ea valence ea 3, 'me ke li-electrone tse 2 feela tse hlokahalang ho kenya letsoho tlamong.Elektrone e setseng e le 1 e fetoha elektrone e sa lefelloeng.Ka hona, bond ea La-B ke tlamo ea tšepe e nang le conductivity e phahameng haholo le conductivity e ntle.Ka lebaka la maqhama a covalent pakeng tsa liathomo tsa B, matla a bond a phahame, matla a tlamo a matla, 'me bolelele ba tlamo bo khutšoanyane, bo fella ka mohaho o kopanetsoeng oa LaB6.E na le litšobotsi tse kang ho thatafala ho phahameng, ntlha e phahameng ea ho qhibiliha, le ho hanyetsa haufi lelitšepe tsa lefatše tse sa tloaelehang.
Nako ea poso: Sep-28-2023