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Long-persistence blue phosphors

  • US 6,117,362 A
  • Filed: 11/06/1998
  • Issued: 09/12/2000
  • Est. Priority Date: 11/07/1997
  • Status: Expired due to Term
First Claim
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1. A phosphor represented by the formula:

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    space="preserve" listing-type="equation">MO . mAl.sub.2 O.sub.3 ;

    Eu .sup.2++,R.sup.3+wherein m is a number ranging from about 1.6 to about 2.2, M is Sr or a combination of Sr with Ca, Ba or both, R3+ is a trivalent metal ion or a mixture thereof, Eu2+ is present at a level from about 0.02 mol % to about 10 mol % of M, and R3+ is present at a level from about 0.02mol % to about 20 mol % of M.

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