Base metal resistive paints

Compositions – Electrically conductive or emissive compositions – Metal compound containing

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Details

338308, 427101, 4271262, 428427, 428432, 524430, H01B 106

Patent

active

046559655

ABSTRACT:
Base metal resistive paints, resistors made therefrom and method for making the resistive paint are disclosed. The base metal resistive paints comprise 20 to 25% tantala glass frit and 75 to 80% tin oxide, ground to a particle size of ten microns or less; and well mixed with 25 to 35% screening agent for subsequent screening upon a suitable substrate, and firing in an inert atmosphere at a peak temperature of about 900.degree. C. The tantala glass frit preferably comprises 5 to 25% tantatum oxide. The tin oxide is preferably preheated at 450.degree. to 600.degree. C. in the presence of a reducing gas, prior to mixing with the tantala glass frit. The screening agent preferably forms no carbon residue when pyrolytically decomposed in an inert atmosphere during firing.

REFERENCES:
patent: 3900330 (1975-08-01), Moriguchi et al.
patent: 3915721 (1975-10-01), Kamigaito et al.
patent: 3928243 (1975-12-01), Kudza et al.
patent: 4065743 (1977-12-01), Wahlers et al.
patent: 4215020 (1980-07-01), Wahlers et al.
patent: 4378409 (1983-03-01), Wahlers et al.
patent: 4379195 (1983-04-01), Prabhu et al.
patent: 4397915 (1983-08-01), Wahlers et al.
"High Valve, High Voltage Resistors" by J. Dearden, Electronic Components-Mar., 1967.

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