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Silicate long lag luminescent materials

A long-lasting luminescence and silicate technology, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of high purity and form requirements, short luminescence time of sulfide phosphors, poor chemical stability, etc., and achieve superior chemical stability. Stability and high temperature resistance, rich and diverse luminous colors, and enhanced luminous intensity

Inactive Publication Date: 2007-10-24
东海布莱特科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the short luminescence time of sulfide phosphors, the brightness is not good; the chemical stability is poor
In order to change these shortcomings, some people have added radioactive substances to sulfide to compensate for its shortcomings, but the operation of adding radioactive substances is not only harmful to the human body, but also pollutes the environment.
Since the 1990s, many people have invested a lot of experiments and invented long-lasting luminescent materials based on strontium aluminate, which greatly improves the luminous brightness. The requirements are too high, which increases its production cost; moreover, due to its single luminous color, its application is limited to a large extent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Example 1. A silicate long afterglow luminescent material, the chemical composition expression of which is:

[0036] 2.5SrO 2.5MgO 2.5SiO 2 0.5P 2 o 5 0.1F:Eu 0.05 · Bi 0.2 · Dy 0.1

[0037] The luminescent material can exhibit blue long afterglow luminescence under the excitation of visible light.

[0038] In this embodiment, Dy may be replaced by Nd or Tm or present at the same time.

Embodiment 2

[0039] Example 2. A silicate long afterglow luminescent material, the chemical composition expression of which is:

[0040] 1.5 (Ca 0.8 Ba 0.5 )O·2.0Mg 0.5 Cd 0.5 )O·2.2(Si 0.5 Ge 0.5 )O 2 0.4B 2 o 3 0.05Cl:Eu 0.03 · Bi 0.15 · Dy0.05

[0041] The luminescent material can exhibit yellow long afterglow luminescence under the excitation of visible light.

[0042] In this embodiment, Dy may be replaced by La or Pr or Ho or present simultaneously.

Embodiment 3

[0043] Example 3. A silicate long afterglow luminescent material, the chemical composition expression of which is:

[0044] (Sr 1.6 Ba 0.4 )O·Mg 0.7 be 0.3 O·(Si 1.5 f 0.5 )O 2 0.3B 2 o 3 0.01Br:Eu 0.01 · Bi 0.10 · Dy 0.01

[0045] The luminescent material can exhibit blue long afterglow luminescence under the excitation of visible light.

[0046] In this embodiment, Dy may be replaced by Tb or Ce or present at the same time.

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PUM

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Abstract

The invention relates to a silicate long afterglow luminous material, which is characterized by the following: regarding the A(Sr1-aMa1)O.B(Mg1-bM2b)O.C(Si1-cM3c)O2. DR.EN:Eux.Biy.Lnz(A, B, C, D, E, a, b, c, x, y and z are mole coefficients) as a chemical composition expression; clearing 420-650nm emission spectrum and showing the blue, blue-green, green, moss green, yellow, red long after glow luminous under 500nm. The invention shining various colors, which shapes an electron trap of producing the fettering action for the electron; improves the luminous intensity of luminous materials; increasing the afterglow duration.

Description

technical field [0001] The invention relates to a luminescent material, in particular to a silicate long afterglow luminescent material. Background technique [0002] The energy-storage luminescent materials in the prior art are made by sintering at high temperature with sulfides such as ZnS:Cu as the main matrix. Due to the short luminescence time of the sulfide phosphor, the brightness is not good; the chemical stability is poor. In order to change these shortcomings, some people have added radioactive substances to sulfide to compensate for its shortcomings, but the operation of adding radioactive substances is not only harmful to the human body, but also pollutes the environment. Since the 1990s, many people have invested a lot of experiments and invented long-lasting luminescent materials based on strontium aluminate, which greatly improves the luminous brightness. However, this type of material still has poor water resistance, which affects the purity and shape of raw...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/79
Inventor 许忠陈中军王加相蔡磊杰
Owner 东海布莱特科技开发有限公司
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