| 摘要 |
PROBLEM TO BE SOLVED: To obtain the subject composition capable of easily exciting any visible light, excellent in luminous capacity and high in afterglow luminance as well, rich in color tone, and high in water resistance. SOLUTION: This luminous fluophor composition is shown by the general formula aT.bT'.cSiO2.dQ:Eux, Ky (T is at least one element selected from Sr, Ca, Ba and Zn; T' is at least one element selected from Mg, Cd and Be; Q is at least one compound selected from B2O3 and P2O5; K is at least one element selected from Nd, Dy, Ho, Tm, La, Pr, Tb, Ce, Mn, Bi, Sn and Sb; (a), b, c, d, x and y satisfy the relationships: 1<=a<=3, 1<=b<=3, 0.5<=c<=9, 0.01<=d<=0.3, 0.0001<=x<=0.2, and 0<=y<=0.3 (mol)). This luminous fluophor composition is obtained by the following practice: using a silicate as the main component of the matrix crystal in placed of an aluminate as the main component of the matrix crystal in conventional luminous fluophor compositions, the silicate is mixed with at least one of the respective oxides of SR, Ca, Ba and Zn, at least one element of Mg, Cd and Be, and at least one oxide selected from B2O3 and P2O5 to construct the matrix crystal, which is then incorporated with europium as activator and a metallic element such as Nd or Dy as coactivator followed by carrying out a burning and sintering.
|
