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Luminescent borates, materials and articles incorporating such borates, and methods and apparatus for their production and use in article authentication

  • US 9,074,137 B2
  • Filed: 11/08/2012
  • Issued: 07/07/2015
  • Est. Priority Date: 11/15/2011
  • Status: Active Grant
First Claim
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1. A luminescent material comprising:

  • a borate having a crystal structure and including a substitutable element;

    neodymium substituted for the substitutable element at a first substitution percentage of at least about 20 percent; and

    ytterbium substituted for the substitutable element at a second substitution percentage.

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