Alkali metal generating agent, alkali metal generator, photoelectric surface, secondary electron emission surface, electron tube, method for manufacturing photoelectric surface, method for manufacturing secondary electron emission surface, and method for manufacturing electron tube

2-5. (canceled)

An alkali metal generating agent as a supply source of an alkali metal used in formation of a photo-cathode for emitting a photoelectron corresponding to incident light or a secondary-electron emitting surface for emitting secondary electrons corresponding to an incident electron, said alkali metal generating agent comprising:

• an oxidizer comprising at least one molybdate with an alkali metal ion as a counter cation;
• and
• a reducer of Si for initiating a redox reaction with the oxidizer at a predetermined temperature to reduce the alkali metal ion.

An alkali metal generating agent as a supply source of an alkali metal which comprises at least Cs and is used in formation of a photo-cathode for emitting a photoelectron corresponding to incident light or a secondary-electron emitting surface for emitting secondary electrons corresponding to an incident electron, said alkali metal generating agent comprising:

• an oxidizer comprising at least one molybdate with an alkali metal ion as a counter cation;
• and
• a reducer for initiating a redox reaction with the oxidizer at a predetermined temperature to reduce the alkali metal ion.