Method for preparing high brightness luminescent material and high brightness luminescent material
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United States of America Patent
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Issued Date -
Jun 15, 2006
app pub date -
Dec 26, 2003
filing date -
Jan 20, 2003
priority date (Note) -
Abandoned
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Abstract
A method for preparing fine particles of a high brightness luminescent material improved in crystallinity; and a high brightness luminescent material prepared by the method. In an embodiment, BaMgAl.sub.10O.sub.17:Eu (BAM) as a high brightness luminescent material is prepared by a method which comprises providing an aqueous solution containing an aluminum alcoholate and water-soluble compounds of barium, magnesium and europium, adding an acid to the aqueous solution to form an acidic solution, heating the acidic solution to ca.900.degree. C. and conducting a calcination at the temperature for a short time, and subsequently, firing the calcined product at a temperature higher than that for the calcination, for example, 1400.degree. C. or higher. The method allows the preparation of BAM which comprises spherical fine particles having a pure phase and being improved in crystallinity, and thus is reduced in the deterioration by heat or VUV.
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