Process, apparatus and manufacture relating to high-purity, sodium amalgam particles useful in lamp manufacture
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United States of America Patent
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May 31, 1983
Issued Date -
N/A
app pub date -
Aug 12, 1980
filing date -
Aug 29, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Substantially pure, free flowing, sodium amalgam particles of predetermined composition and controlled particle size are prepared for use as vaporizable fill for high pressure discharge lamp devices, whereby accurately measurable quantities of the sodium amalgam may be introduced into the lamp devices. A process for producing the substantially pure amalgam particles of accurately controlled size includes heating a mixture of sodium and mercury to form a melt, passing the melt through a vibrating discharge nozzle and subjecting the droplets so formed to an inert cooling fluid maintained at a temperature below the solidification point of the amalgam. An apparatus for producing the amalgam particles comprises a vessel to contain an alkali metal amalgam melt, a vibrating discharge nozzle adapted to form the melt into uniformly sized droplets, and a column of inert cooling fluid maintained at a low temperature at which the melt droplets are solidified.
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