Electrode for discharge lamp, method of manufacturing electrode for discharge lamp, and discharge lamp
AssigneeAsahi Glass Company, Limited
InventorsKazuhiro ITO, Satoru WATANABE, Naomichi MIYAKAWA, Yutaka KUROIWA, Setsuro ITO
Life of this patent
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Abstract
An electrode for a discharge lamp is provided with a mayenite compound in at least a part of the electrode that emits secondary electrons, and the mayenite compound is fired in a vacuum atmosphere with an oxygen partial pressure of 10−3 Pa or less, an inert gas atmosphere with an oxygen partial pressure of 10−3 Pa or less, or a reducing atmosphere with an oxygen partial pressure of 10−3 Pa or less.
Claims10
An electrode for a discharge lamp, comprising a mayenite compound in at least a part of the electrode emitting secondary electrons, wherein the mayenite compound is fired in a vacuum atmosphere with an oxygen partial pressure of 10−3 Pa or less, an inert gas atmosphere with an oxygen partial pressure of 10−3 Pa or less, or a reducing atmosphere with an oxygen partial pressure of 10−3 Pa or less.
A method of manufacturing an electrode for a discharge lamp, comprising:
- foaming a part of the electrode or the electrode in its entirety by a mayenite compound, and thereafter firing the mayenite compound in a vacuum atmosphere with an oxygen partial pressure of 10−3 Pa or less, an inert gas atmosphere with an oxygen partial pressure of 10−3 Pa or less, or a reducing atmosphere with an oxygen partial pressure of 10−3 Pa or less.
A discharge lamp comprising:
- a glass tube;
- a discharge gas sealed inside the glass tube;
- and
- a mayenite compound provided inside the glass tube at a part making contact with the discharge gas,
- wherein the mayenite compound is fired in a vacuum atmosphere with an oxygen partial pressure of 10−3 Pa or less, an inert gas atmosphere with an oxygen partial pressure of 10−3 Pa or less, or a reducing atmosphere with an oxygen partial pressure of 10−3 Pa or less.
Dependencies are inferred from the claim text.