boride hot cathode

Игры ⚽ Нужно сделать НИР?

Hot cathode — is also a name for a hot filament ionization gauge, a vacuum measuring device.In vacuum tubes, a hot cathode is a cathode electrode which emits electrons due to thermionic emission. ( Cf. cold cathodes, where field emission is used and which do… … Wikipedia
Lanthanum hexaboride — Chembox new ImageFile = ImageSize = IUPACName = OtherNames = lanthanum boride Section1 = Chembox Identifiers CASNo = 12008 21 8 PubChem = SMILES = Section2 = Chembox Properties Formula = LaB6 MolarMass = 203.776 g/mol Appearance = intense purple… … Wikipedia
Lanthanum — (pronEng|ˈlænθənəm) is a chemical element with the symbol La and atomic number 57. Characteristics Lanthanum is a silvery white metallic element that belongs to group 3 of the periodic table and is a lanthanoid. Found in some rare earth minerals … Wikipedia
Cerium hexaboride — Other names cerium boride, ceBIX, CEBIX Identifiers … Wikipedia

Словари и энциклопедии на Академике