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

Title:

Document Type and Number:

WIPO Patent Application WO/2004/066337

Kind Code:

A1

Abstract:

An alkali metal generating agent (1) for use in forming a photoelectric surface emitting a photoelectron corresponding to an incident light or a secondary electron emission surface emitting a secondary electron corresponding to an incident electron, which comprises an oxidizing agent comprising at least one tungstate having an alkali metal ion as a counter cation and a reducing agent for reducing the above cation. The above metal generating agent (1), which includes a tungstate having weaker oxidizing power than that of a chromate, undergoes slower oxidation-reduction reaction, which results in easier reaction rate control as compared to a conventional technique using a chromate, leading to the generation of an alkali metal with good stability.

Inventors:

SUGIYAMA HIROYUKI (JP)
AKAI YOSHIRO (JP)
SAKAI SHIROU (JP)

Application Number:

PCT/JP2004/000294

Publication Date:

August 05, 2004

Filing Date:

January 16, 2004

Export Citation:

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Assignee:

HAMAMATSU PHOTONICS KK (JP)
SUGIYAMA HIROYUKI (JP)
AKAI YOSHIRO (JP)
SAKAI SHIROU (JP)

International Classes:

C22B5/04; C22B26/10; C23C14/14; C23C14/24; H01J1/35; H01J9/12; (IPC1-7): H01J9/12

Foreign References:

JPS4820944B1	1973-06-25
JPS4715976B1
JPS5578438A	1980-06-13
JPH02106846A	1990-04-18
JPS442428Y1	1969-01-29

Other References: