Metal silicate-silica-based polymorphous phosphors and lighting devices
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United States of America Patent
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Oct 2, 2007
Grant Date -
Sep 28, 2006
app pub date -
Jun 10, 2005
filing date -
Mar 25, 2005
priority date (Note) -
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Abstract
Provided, among other things, is a phosphor according to the formula: [(BvSiO.sub.3).sub.x(Mv.sub.2SiO.sub.3).sub.y(Tv.sub.2(SiO.sub.3).sub.3).-sub.z].sub.m.cndot.(SiO.sub.2).sub.n: R.epsilon., X (I) wherein x, y and z are any value such that x+y+z=1; Bv is one or more divalent alkaline earth metals; Mv is one or more monovalent alkaline metals; Tv is one or more trivalent metal ions; R.epsilon. is one or more activators selected from Eu.sup.2+ and Mn.sup.2+; X is one or more halides; m is 1 or 0; and (i) n>3 if m=1 and provides an amount of silica effective to host useful luminescence or (ii) n=1 if m=0.
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