Method for detecting a leak in a reaction tube when forming a II

Details Method for detecting a leak in a reaction tube when forming a II Method for detecting a leak in a reaction tube when forming a II

1975-03-24

1976-11-02

Queisser, Richard C.

Measuring and testing

With fluid pressure

Leakage

73 493, 23230L, G01M 306, G01M 334

Patent

active

039889203

ABSTRACT:
In an apparatus for the preparation of compounds in which one of the components is a highly volatile reactive component, in particular when preparing gallium phosphide, under pressure in an ampoule located in a pressure vessel, between 0.5 and 25% by volume and preferably 1.5 to 3% by volume of a gas capable of reacting with the highly volatile component, such as oxygen, air or carbon dioxide, is mixed in the pressure vessel to the gas which is used for pressurizing and as a cooling medium and the pressure in the pressure vessel is matched to the internal pressure of the ampoule in which the reaction is taking place.

REFERENCES:
patent: 1933791 (1933-11-01), Crouch
patent: 2374762 (1945-05-01), McNitt
patent: 2708896 (1955-05-01), Smith et al.
patent: 3406017 (1968-10-01), Canning
patent: 3572085 (1971-03-01), Packo
patent: 3598532 (1971-08-01), Adams et al.
"The Preparation and Floating Zone Processing of Gallium Phosphide;" Frosch & Derick, Journal of Electrochemical Society, vol. 108, p. 251 (1961).

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