| 摘要 |
PROBLEM TO BE SOLVED: To realize a discharge tube which can suppress fluctuation rate of a discharge starting voltage when used under a high temperature environment in a discharge tube in which a film is formed on the surface of a discharge electrode by coating a solution in which potassium iodide is added in a binder composed of sodium silicate solution and pure water. SOLUTION: This is the discharge tube in which an airtight housing 16 is formed by sealing airtight the aperture at both ends of a case member 12 by a pair of lid members 14, 14 working as a discharge electrode, a discharge gas is filled in the airtight housing 16, a discharge spacing 22 is formed between the discharge electrodes of the lid members 14, 14, trigger discharge film 28 of which both ends are arranged having a minute discharge spacing 26 between the lid members 14, 14 is formed at the inner wall 24 of the case member 12, and furthermore a film 30 in which potassium iodide is added in a binder composed of sodium silicate solution and pure water and coated, and potassium iodide is contained is formed on the surface of the discharge electrode part 18. The added quantity of potassium iodide into the binder is made 0.01-23 wt%. COPYRIGHT: (C)2005,JPO&NCIPI
|
