| 摘要 |
Luminescent materials comprising luminescent ternary aluminates having a hexagonal crystal structure corresponding to the magnetoplumbite structure, which contain gadolinium and which are activated by at least one of the elements Pb, Sb, Ce, Sn, Tb, Mn, Cr, and Dy. The composition of the aluminate can be represented in a ternary phase diagram of a system ABC, wherein A represents 1 DIVIDED 2Gd2O3 and at least one of the oxides 1 DIVIDED 2La2O3, 1 DIVIDED 2 Ce2O3, 1 DIVIDED 2Tb2O3, 1 DIVIDED 2Dy2O3, 1 DIVIDED 2Sb2O3, PbO, SnO, wherein at least 1 mol.% A is 1 DIVIDED 2Gd2O3, not more than 60 mol.% A is 1 DIVIDED 2Tb2O3, not more than 20 mol.% A is 1 DIVIDED 2Dy2O3, not more than 20 mol.% A is 1 DIVIDED 2Sb2O3, not more than 35 mol.% A is PbO and not more than 25 mol.% A is SnO, wherein B represents Al2O3, wherein not more than 20 mol.% of the Al2O3 in B may be replaced by Sc2O3, not more than 10 mol.% of the Al2O3 in B may be replaced by Cr2O3 and not more than 10 mol.% of the Al2O3 in B may be replaced by a chemically equivalent quantity of a combination of equimolar quantities of SiO2 and (MgO and/or ZnO), wherein C represents at least one of the oxides MgO, ZnO, 1 DIVIDED 2LiAlO2 and MnO, wherein not more than 20 mol.% of C consists of MnO, wherein up to 98 mol.% of A may be replaced by SrO and/or CaO when simultaneously or equimolar quantity of C is replaced by 1 DIVIDED 2Al2O3, where [A] is at least 0.02, [B] is at least 0.55 and is not more than 0.95, and [C] is at least 1 DIVIDED 2[A], wherein [A] + [B] + [C] = 1. <IMAGE> |
