ALUMINUM SILICATE LUMINOUS MATERIAL EMITTING BLUE OR BLUISH GREEN LIGHT AND ITS PRODUCTION

摘要

PROBLEM TO BE SOLVED: To obtain the subject new compound capable of exciting with an electron beam, an ultraviolet light and a visible light indoors, outdoors and at a dark place such as underwater, exhibiting luminescence in blue to bluish green color, showing thermal stability and excellent chemical stability in an acidic and a reducing atmospheres. ;SOLUTION: This compound is shown by the formula (Square make is a composition defective; M is one or more alkaline earth metals selected from magnesium, calcium, etc.; M* is one or more divalent metal elements selected from manganese, zinc, etc.; (n), (m) and (x) are numbers to satisfy 0≤n≤0.2, 0x0. 6, 0.0001≤m≤0.1) such as Sr_0.995Eu_0.005Al_1.85Si_0.15O₄₀. The compound is obtained by baking raw material powder comprising an M element-containing compound, an M* element-containing compound, an aluminum element-containing compound and an Si element-containing compound or a compound containing silicon and Eu elements in the ratio of the composition formula together with sodium carbonate, etc.;COPYRIGHT: (C)1999,JPO