Patent ID: 8148886

Claim:
A method for producing Eu-activated CaAlSiN 3 powder, comprising firing a mixture of Ca 3 N 2 , AlN, Si 3 N 4 and EuN raw material powder at 1,400 to 2,000° C. in a nitrogen-containing atmosphere, the Ca 3 N 2 , AlN and Si 3 N 4 raw material powders giving a composition represented by xCa 3 N 2 .yAlN.zSi 3 N 4 , wherein x+y+z=100, 10≦x≦70 and y:z=(72:28) to (78:22), and the EuN being contained in an amount of 0.01 to 10 parts by weight as Eu per 100 parts by weight in total of the Ca 3 N 2 , AlN and Si 3 N 4 , wherein an amorphous Si 3 N 4 or a nitrogen-containing silane compound is used as the Si 3 N 4 raw material powder.