Patent ID: 6085971
Filing Date: 2000-07-11
Classification: C09K,H01J

Abstract:
A luminescent metaborate substance consisting essentially of a substance having the formula(Y,La).sub.1-x-y-z Ce.sub.x Gd.sub.y Tb.sub.z (Mg,Zn,Cd).sub.1-p Mn.sub.p B.sub.5-q-s (Al,Ga).sub.q (X).sub.s O.sub.10,in which X is Si, Ge, P, Zr, V, Nb, Ta, W or two or more than two of the elements mentioned and furthermore a) y = z = p = 0 0.01 .ltoreq. x .ltoreq. 1.0 0 .ltoreq. q .ltoreq. 1.0 0 < s .ltoreq. 1.0 or b) z = p = 0 and y .noteq. 0 0.01 .ltoreq. x .ltoreq. 1 - y 0.02 .ltoreq. y .ltoreq. 0.80 0 .ltoreq. q .ltoreq. 1.0 0 < s .ltoreq. 1.0 or c) p = 0 and z .noteq. 0 0.01 .ltoreq. x .ltoreq. 1 - y - z 0 .ltoreq. y .ltoreq. 0.98 y + z .ltoreq. 0.99 0.01 .ltoreq. z .ltoreq. 0.75 0 .ltoreq. q .ltoreq. 1.0 0 < s .ltoreq. 1.0 or d) z = 0 and p .noteq. 0 0.01 .ltoreq. x .ltoreq. 1 - y 0 .ltoreq. y .ltoreq. 0.99 0.01 .ltoreq. p .ltoreq. 0.30 0 .ltoreq. q .ltoreq. 1.0 0 < s .ltoreq. 1.0 or e) p .noteq. 0 and z .noteq. 0 0.01 .ltoreq. x < 1 - y - z 0 .ltoreq. y .ltoreq. 0.98 0.01 .ltoreq. z .ltoreq. 0.75 x + z .ltoreq. 0.99 0.01 .ltoreq. p .ltoreq. 0.30 0 .ltoreq. q .ltoreq. 1.0 0 < s .ltoreq. 1.0.