Secondary electron emission and glow discharge properties of 12CaO·7Al2O3 electride for fluorescent lamp applications

摘要

12CaO 7Al₂O₃ electride, a sub-nanoporous compound having a work function of 2.4?eV, was examined as a candidate cathode material in fluorescent lamps. The electron emission yield was higher and the discharge voltage was lower for 12CaO 7Al₂O₃ than for existing cathode materials such as Ni, Mo or W; therefore, the energy consumption of the fluorescent lamps can be improved using 12CaO 7Al₂O₃ cathodes. Prototype glow-discharge lamps using 12CaO 7Al₂O₃ were constructed and exhibited reasonable durability.