Device for determining carbon activity through pressure

Chemistry: physical processes – Physical processes – Crystallization

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23253R, 73 19, G01N 712

Patent

active

039415660

ABSTRACT:
A hollow iron capsule of annular shape having an interior layer of Fe.sub.0.947 0 and a near absolute internal vacuum is submersed within a molten metal with the inner chamber of the capsule connected to a pressure sensor. Carbon present in the molten metal diffuses through the capsule wall and reacts with the Fe.sub.0.947 0 layer to generate a CO.sub.2 --CO gas mixture within the internal chamber. The total absolute pressure of the gas measured by the pressure sensor is directly proportional to the carbon activity of the molten metal.

REFERENCES:
patent: 3060726 (1962-10-01), Weber
patent: 3451256 (1969-06-01), Kolodney
patent: 3679551 (1972-06-01), Kolodney
patent: 3681026 (1972-08-01), Holden
patent: 3797299 (1974-03-01), Nelson et al.
patent: 3843419 (1974-10-01), Schmidt

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