Cathode-ray tube fluorescent material and its method of manufacture
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United States of America Patent
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Jul 25, 1995
Grant Date -
N/A
app pub date -
Mar 10, 1994
filing date -
Mar 11, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Electrolytes are attached to fluorescent particle surfaces to prevent open spots in cathode-ray tube coatings dried at high temperatures. Electrolytes that are sulfates, nitrates, or chlorides of alkali or alkaline-earth metals are added to a liquid suspension of fluorescent particles which have passed through a cleaning step. Electrolytes are added to the suspension to make the conductivity of the clear top liquid greater than 30 .mu..OMEGA..sup.-1 cm.sup.-1. The fluorescent particle preparation process is finished with a final dehydration and drying step.
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