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SURFACE-TREATED FLUORESCENT MATERIAL AND PROCESS FOR PRODUCING SURFACE-TREATED FLUORESCENT MATERIAL

  • US 20130161678A1
  • Filed: 08/04/2011
  • Published: 06/27/2013
  • Est. Priority Date: 08/04/2010
  • Status: Active Grant
First Claim
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1. A surface treated phosphor comprising:

  • a phosphor matrix including an alkaline earth metal and silicon; and

    a surface treatment layer including an alkaline earth metal, silicon, and a specific element belonging to groups 4 to 6 of the periodic table,wherein, when element distribution of the surface treatment layer in the thickness direction viewed in cross-section is determined by electron microscopy and energy dispersive X-ray spectroscopy coupled with the electron microscopy, the position representing the maximum peak of a specific element content is located closer to the surface than the position representing the maximum peak of a silicon content andsilicon contents of the phosphor matrix and the surface treatment layer satisfy the following formula (1);


    [Formula 1]
    S1<

    S2



    (1)wherein S1 represents the silicon content of the phosphor matrix and S2 represents the silicon content of the surface treatment layer.

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