Article and method of forming porous coating on electrode layer

Details Article and method of forming porous coating on electrode layer Article and method of forming porous coating on electrode layer

1976-06-10

1978-06-27

Gwinnell, Harry J.

Chemistry: electrical and wave energy

Processes and products

Vacuum arc discharge coating

427 34, 427402, 427243, G01N 2726

Patent

active

040973530

ABSTRACT:
A porous coating, which is effective in restricting the flow of a gas under measurement relatively to the electrode layer of the sensor and protecting the electrode against detrimental influences, is formed by spraying fine particles of a heat-resistant and chemically stable material at a high temperature onto the electrode surface to form a porous layer with pores of a moderate size, then impregnating the porous layer with an aqueous dispersion of fine particles of a similar material followed by baking the impregnated layer, so that the finished coating has pores of appropriate size and total volume.

REFERENCES:
patent: 3335025 (1967-08-01), Rightmire et al.
patent: 3671302 (1972-06-01), Nell et al.
patent: 3978006 (1976-08-01), Topp et al.

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