Method and apparatus for determining gas content in inorganic su

Details Method and apparatus for determining gas content in inorganic su Method and apparatus for determining gas content in inorganic su

1974-05-17

1976-03-23

Lawrence, James W.

Radiant energy

Ionic separation or analysis

Methods

250288, 73 19, G01M 714

Patent

active

039462285

ABSTRACT:
A method and apparatus for determining the gas content of inorganic conductive and semiconductive elements and compounds having a low sublimation temperature, in which a melt of the substance in a crucible has a pressure approximately equal to the saturation vapor pressure maintained above the melt with a high vacuum maintained in the extraction chamber. In the disclosed embodiment, this is accomplished in a gas extraction system which can be evacuated and in which is contained a graphite crucible used as a sample vessel with means for heating the crucible by direct passage of current with the crucible having a conically fitted and drilled graphite cover into which a sintered filter is pressed for maintaining the pressure above the melt.

REFERENCES:
patent: 2995922 (1961-08-01), Firth et al.
patent: 3498105 (1970-03-01), Hetherington
patent: 3529937 (1970-09-01), Ihara et al.
patent: 3559453 (1971-02-01), Aspinal et al.
patent: 3844716 (1974-10-01), Noakes

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