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Alkaline earth phosphate long afterglow luminous material and its preparing method

A technology of phosphate growth and luminescent materials, which is applied in the direction of luminescent materials, chemical instruments and methods, etc. It can solve the problems of use restrictions, radioactive elements, human health and environmental hazards, and achieve the effects of low production cost, no radioactivity, and wide application

Inactive Publication Date: 2006-05-24
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Material coating and other means to overcome these shortcomings; but the addition of radioactive elements will cause harm to human health and the environment, and the use of this material is greatly limited

Method used

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  • Alkaline earth phosphate long afterglow luminous material and its preparing method
  • Alkaline earth phosphate long afterglow luminous material and its preparing method

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Experimental program
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Effect test

Embodiment 1

[0018] According to the chemical formula Ca 0.97 Mg 2 (PO 4 ) 2 :0.01Eu, 0.02Gd, accurately called calcium carbonate CaCO 3 0.00485mol (0.4850g), basic magnesium carbonate Mg(OH) 2 4MgCO 3 ·6H 2 O0.002mol (1.0073g), diammonium hydrogen phosphate (NH 4 ) 2 HPO 4 0.01mol (1.3206g), gadolinium oxide Gd 2 o 3 0.00005mol (0.0181g), europium oxide Eu 2 o 3 0.000025mol (0.0088g), mixed well, pre-sintered at 300°C for 6 hours in a carbon-reducing atmosphere, cooled to room temperature, took out the sample, fully ground again and reacted at 950°C for 12 hours in a carbon-reducing atmosphere , the sample was analyzed by powder x-ray diffraction, and the main phase was CaMg 2 (PO 4 ) 2 .

Embodiment 2

[0020] According to the chemical formula Ca 0.975 Mg 2 (PO 4 ) 2 : 0.005Eu, 0.02La, accurately called calcium oxide CaO0.O04875mol (0.2764g), basic magnesium carbonate Mg(OH) 2 4MgCO 3 ·6H 2 O0.002mol (1.0073g), ammonium dihydrogen phosphate NH 4 h 2 PO 4 0.01mol (1.1503g), lanthanum oxide La 2 o 3 0.00005mol (0.0163g), europium oxide Eu 2 o 3 0.0000125mol (0.0044g), after mixing well, pre-sinter at 400°C for 4 hours under a nitrogen reducing atmosphere, after cooling to room temperature, take out the sample, fully grind it again and react at 1000°C for 10 hours in a nitrogen reducing atmosphere , the sample was analyzed by powder x-ray diffraction, and the main phase was CaMg 2 (PO 4 ) 2 .

Embodiment 3

[0022] According to the chemical formula Ca 0.96 Mg 2 (PO 4 ) 2 : 0.02Eu, 0.02Al, accurately called calcium carbonate CaCO 3 0.0048mol (0.4800g), magnesium oxide MgO 0.01mol (0.4030g), phosphorus pentoxide P 2 o 5 0.005mol (0.7097g), aluminum oxide Al 2 o 3 0.00005mol (0.0051g), europium oxide Eu 2 o 3 0.00005mol (0.0176g), after mixing well, pre-sinter at 600°C for 2 hours in a hydrogen reducing atmosphere, after cooling to room temperature, take out the sample, grind it again and react at 1050°C for 8 hours in a hydrogen reducing atmosphere Prepared, the sample was analyzed by powder x-ray diffraction, and the main phase was CaMg 2 (PO 4 ) 2 .

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Abstract

The invention relates to an alkali soil phosphate long afterglow emitting material and the method to manufacture that belongs to emitting material field. it is made up from weighting according to the ratio and grinding to equal, sintering for 5-12h under 950-1200 degree centigrade or 3-6h under 300-600 degree centigrade, cooling to room temperature, grinding again and sintering for 5-12h in reducing atmosphere to gain compounding. The emitting light could be from magenta to blue, and the afterglow could last for 5 hours.

Description

technical field [0001] The invention relates to an alkaline earth phosphate purple and blue long afterglow luminescent material and a preparation method, belonging to the technical field of luminescent materials. Background technique [0002] Long afterglow luminescent materials, also known as luminescent materials, are substances that absorb sunlight or light generated by artificial light sources, emit visible light, and can continue to emit light after the excitation stops. It has the characteristics of storing light by daylight or light, and emitting light at night or in the dark. It is a kind of energy storage and energy-saving luminescent material. Long afterglow materials are widely used in low-light lighting and display. Their products, such as luminous templates, luminous paints, luminous inks, luminous plastics, luminous ceramics, luminous chemical fibers, and luminous safety signs, have been widely used in transportation, fire emergency safety, Various industries ...

Claims

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Application Information

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IPC IPC(8): C09K11/78
Inventor 苏锵刘丽艳李成宇
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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