Method of making crucibles for flameless atomic absorption spect

Details Method of making crucibles for flameless atomic absorption spect Method of making crucibles for flameless atomic absorption spect

1980-12-05

1984-10-09

Childs, Sadie L.

Coating processes

Coating by vapor, gas, or smoke

Carbon or carbide coating

4272555, C23C 1100, C23C 1300

Patent

active

044761635

ABSTRACT:
A method of making crucibles for flameless atomic spectroscopy comprises coating carbon crucible preforms with pyrolytic graphite in a reaction vessel by deposition of the graphite from a gas phase wherein the carbon crucible preforms are removed from the reaction vessel after cooling to room temperature and are re-introduced into the reaction vessel orientated in different positions before application of a second or subsequent coating to give a total thickness of the coatings of 20 to 80 .mu.m.

REFERENCES:
patent: 3138435 (1964-06-01), Diefendorf
patent: 3369920 (1968-02-01), Bourdeau et al.
patent: 3549847 (1970-12-01), Clark et al.
patent: 3619286 (1971-11-01), Gutnajer
patent: 3715253 (1973-02-01), Olcott
patent: 3720499 (1973-03-01), Hirayama et al.
patent: 3811927 (1974-05-01), Joo et al.
patent: 3944686 (1976-03-01), Froberg

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