| 简介 |
The present invention relates to a waterproof multiple rare-earth co-activated long-afterglow luminescent material having its general chemical composition depicted by a formula aMO€¢bAl 2 O 3 €¢cSiO 2 €¢dGa 2 O 3 : xEu€¢yB€¢zN, wherein a, b, c, d, x, y, and z are coefficients with the ranges of 0.5 ‰¤ a ‰¤ 2, 0.5 ‰¤ b ‰¤ 3, 0.001 ‰¤ c ‰¤ 1, 0.0001 ‰¤ d ‰¤ 1, 0.0001 ‰¤ x ‰¤ 1, 0.0001 ‰¤ y ‰¤ 1, 0.0001 ‰¤ z ‰¤ 1, M is Ca or Sr, N is Dy or Nd, wherein Sr (or Ca), Al, Si, Ga are main substrate matrix elements and Eu, B, Dy (or Nd) elements are activators. The waterproof multiple rare-earth co-activated long-afterglow luminescent material according to the present invention not only has advantage of a longer afterglow time, but also has water resistance greatly superior to rare-earth activated aluminate long-afterglow luminescent material in the prior art, and still keeps higher long-afterglow property after dipping into water for 60 hours, especially shows its superiority when working or used under the environment of dipping into water or dampness. |
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