Electric discharge tube and method of manufacturing an electrica

Coating processes – Electrical product produced – Fluorescent or phosphorescent base coating

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427 68, 313479, 252510, B05D 506, B05D 512

Patent

active

045500320

ABSTRACT:
An electrically conductive layer on a wall portion of the envelope of an electric discharge tube which comprises an electrically conductive material and at least 5% by weight of silicon dioxide as an adhesive, adheres readily, is hard and can be washed with water.
Such a layer can be obtained from a suspension comprising an electrically conductive material and a binder in a solvent, in which the binder is a quaternary ammonium silicate or a solution of silicon dioxide (SiO.sub.2) in phosphoric acid (H.sub.3 PO.sub.4), in which the mol ratio SiO.sub.2 /P.sub.2 O.sub.5 is between 0.3:1 and 20:1.

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