Silicate long-afterglow luminescent material and its production

A long afterglow luminescence, silicate technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of high material hardness, long light storage time, unstable water, etc., and achieve stable chemical properties, fast reflection, and application environment. wide range of effects

Inactive Publication Date: 2007-11-21
济南朗星科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the above-mentioned aluminate luminescent materials have defects such as long

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] Example 1:

[0022] Raw material ratio:

[0023] Material mole ratio weight

[0024] SrCO 3 1 147

[0025] CaCO 3 2 200

[0026] MgO 1 40

[0027] SiO 2 2 120

[0028] H 3 BO 3 0.1 6.2

[0029] Eu 2 O 3 0.01 3.52

[0030] Dy 2 O 3 0.01 3.73

[0031] The molar coefficients of the powders of strontium carbonate, calcium carbonate, magnesium oxide, silicon dioxide, boric acid, Dy oxide, and Eu oxide are homogenized, ball milled for 8 hours, and the mixture is uniform. The obtained mixture is called powder; Put it into an alumina crucible, reduce it with carbon powder, and sinter it at 1200°C for 5 hours. The powder is sintered into a powder block; after cooling to room temperature, the powder block is taken out and crushed to powder to obtain a yellow-green (520nm) long afterglow emission material. After excitation, the dark place emits yellow-green fluorescence (520nm), and the excitation is fast, the brightness is high, especially the initial effe...

Example Embodiment

[0032] Example 2:

[0033] Raw material ratio:

[0034] Material mole ratio weight

[0035] SrCO 3 2 294

[0036] CaCO 3 2 200

[0037] MgO 1 40

[0038] SiO 2 2 120

[0039] H 3 BO 3 0.1 6.2

[0040] Eu 2 O 3 0.01 3.52

[0041] Dy 2 O 3 0.01 3.73

[0042] The molar coefficients of the powders of strontium carbonate, calcium carbonate, magnesium oxide, silicon dioxide, boric acid, rare earth oxides, and Eu oxides are homogenized, ball milled for 7 hours, and homogenized, and the resulting mixture is called powder; Put it into an alumina crucible, reduce it with hydrogen, and sinter at 1330°C for 3 hours. The powder is sintered into a powder block; after cooling to room temperature, the powder block is taken out and crushed to powder to obtain a yellow-green (520nm) long afterglow luminescent material . After excitation, the dark place emits yellow-green fluorescence (520nm), and the excitation is fast, the brightness is high, especially the initia...

Example Embodiment

[0043] Example 3

[0044] Material mole ratio weight

[0045] SrCO 3 1 147

[0046] CaCO 3 4 400

[0047] MgO 0.5 20

[0048] SiO 2 10 600

[0049] H 3 BO 3 0.05 3.1

[0050] Eu 2 O 3 0.04 14.08

[0051] Nd 2 O 3 0.03 10.08.

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PUM

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Abstract

A yellow-green silicate long persistence luminescent material and its production are disclosed. The chemical formula is aSrO. bCaO. cMgO. dSio2. eB203.Eux.Lny; Ln is lanthanide element except Eu, it reinforces persistent effect; a, b, c, d, e, x and y are mol coefficients, proportion of a: b: c: d: e: x: y is 1: 0.2-5: 0.3-15: 0.4-20: 0.01-1: 0.001-0.1: 0.001-1 mol. It has high brightness, fast reactive speed under weak-light excitation condition, stable chemical property and various applied environments.

Description

technical field [0001] The invention belongs to the field of long afterglow luminescent materials, and relates to a silicate long afterglow luminescent material and a preparation method thereof. Background technique [0002] Rare earth aluminate luminescent materials and rare earth silicate luminescent materials have attracted much attention due to their characteristics of high brightness, long time, good chemical stability, and no radiation hazards, and more have entered people's daily life. The yellow-green luminescent (520nm) aluminate luminescent materials account for 90% of the market share. However, aluminate luminescent materials have defects such as long light storage time, large energy level difference, instability in water, and high material hardness. [0003] The patent CN1132777A of Japan Nemoto Chemical Co., Ltd. discloses a yellow-green luminescent material of aluminate, whose structural formula is MAL 2 o 4 (M is calcium, strontium, barium and other element...

Claims

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Application Information

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IPC IPC(8): C09K11/78
Inventor 苏世民
Owner 济南朗星科技有限公司
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