The use of the electride form of 12CaO-7Al2O3, or C12A7, as a low work function electron emitter in a hollow cathode discharge apparatus is described. No heater is required to initiate operation of the present cathode, as is necessary for traditional hollow cathode devices. Because C12A7 has a fully oxidized lattice structure, exposure to oxygen does not degrade the electride. The electride was surrounded by a graphite liner since it was found that the C12A7 electride converts to it's eutectic (CA+C3A) form when heated (through natural hollow cathode operation) in a metal tube.
申请公布号
EP2994556(A4)
申请公布日期
2017.03.22
申请号
EP20140788120
申请日期
2014.04.28
申请人
Colorado State University Research Foundation;Rand, Lauren P.;Williams, John D.;Martinez, Rafael A.
发明人
RAND, Lauren P.;WILLIAMS, John D.;MARTINEZ, Rafael A.