×

Nitride fluorescent material, method for producing the same, and light emitting device

  • US 9,944,851 B2
  • Filed: 08/25/2016
  • Issued: 04/17/2018
  • Est. Priority Date: 08/28/2015
  • Status: Active Grant
First Claim
Patent Images

1. A method for producing a nitride fluorescent material, the method comprising heat-treating a raw material mixture comprising silicon nitride, silicon, an aluminium compound, a calcium compound, and a europium compound,wherein the nitride fluorescent material has a composition represented by formula (I):


  • SrsCatAluSivNw;

    Eu 



    (I)wherein s, t, u, v, and w respectively satisfy 0≤

    s<

    1, 0<

    t≤

    1, s+t≤

    1, 0.9≤

    u≤

    1.1, 0.9≤

    v≤

    1.1, and 2.5≤

    w≤

    3.5, andwherein a content of silicon is from 30% by weight to 80% by weight relative to the total amount of silicon nitride and silicon in the raw material mixture.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×