Lanthanum Hexaboride Cathodes for Electron Microscopes 電子顯微鏡用六硼化鑭陰極

High current, high brightness, single crystal with microflat
Current densities up to 30 A/cm²
Emission surfaces sized? for microscope use
Long lifetimes
Operating pressure < 10^-7?torr
Ceramic AEI base or various microscope bases