| 摘要 |
PROBLEM TO BE SOLVED: To obtain a luminescent substance having a specific chemical composition, a narrow half value width, a remarkably high emission intensity, requiring a small amount of Ce especially in a barium.calcium.aluminate fluorescent substance and capable of being produced at a relative low cost. SOLUTION: This green color-emitting aluminate-based fluorescent substance has a chemical composition expressed by formula I (0.5<x<1,2, 0.2<z<0.51), preferably formula II (0.4<p<0.8, 0.04<q<0.2, 0.04<r<0.2, 0.1<s<0.4, p+q+s+r=1). The aforesaid fluorescent substance is obtained by accurately measuring a raw material, e.g. barium carbonate, calcium carbonate, manganese carbonate, cerium carbonate, zinc carbonate, strontium carbonate, aluminum oxide, and aluminum fluoride as a flux to have a desired molar ratio per unit molar equivalent, mixing in a ball mill, then, baking at a temp. of 1,000-1,500 deg.C and further increasing the amounts of Mn and Ce.
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