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Rare earth halosilicate red long-afterglow phosphor, and preparation method thereof

A long afterglow phosphor, halosilicate technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of afterglow brightness and low afterglow time, and achieve the effect of enhancing initial brightness and prolonging afterglow time.

Inactive Publication Date: 2011-10-26
LONGNANXIAN SHUNDE MINGHUI FLUORESCENT MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of low afterglow brightness and afterglow time of the existing rare earth red long afterglow phosphor, the present invention provides a rare earth halosilicate red long afterglow phosphor and a preparation method thereof

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Step 1: Ingredients, weigh MgF 2 629.4g, 4MgCO 3 ·Mg(OH) 2 ·5H 2 O (basic magnesium carbonate) 1167.6g, CaCO 3 2254.5g, SiO 2 1237.4g, Y 2 o 3 75.3g, Eu 2 o 3 52.8g, Er 2 o 3 9.6g, Bi 2 o 3 11.7g; and add 1% of the total weight of flux H 3 BO 3 ;

[0028] Step 2: Mix the ingredients. Put the raw materials in step 1 into the mixing tank according to the quality, add some agate balls, the mass ratio of the ingredients to the agate balls is 10:1, and then mix and stir at room temperature for 10 hours;

[0029] Step 3: Burning at high temperature, put the uniformly mixed materials in step 2 into the corundum crucible, then send it into the sintering furnace, the pressure is normal pressure, raise the temperature of the sintering furnace to 1200°C, keep it warm for 0.1h, then cool down naturally, and wait for the furnace After the temperature dropped to 180°C, the crucible was taken out and cooled to room temperature;

[0030] Step 4: crushing, crushing the m...

Embodiment 2

[0037] Step 1: Ingredients, weigh MgF 2 629.4g, 4MgCO 3 ·Mg(OH) 2 ·5H 2 O (basic magnesium carbonate) 1167.6g, CaCO 3 2252.g, SiO 2 1237.4g, Y 2 o 3 75.3g, Eu 2 o 3 52.8g, Er 2 o 3 9.6g, Bi 2 o 3 11.7g, Dy 2 o 3 9.3g; and add 1% of the total weight of flux H 3 BO 3 ;

[0038] Step 2: Mix the ingredients. Put the raw materials in step 1 into the mixing tank according to the quality, add some agate balls, the mass ratio of the ingredients to the agate balls is 10:1, and then mix and stir at room temperature for 12 hours;

[0039] Step 3: Burning at high temperature, put the uniformly mixed materials in step 2 into the corundum crucible, then send it into the sintering furnace, the pressure is normal pressure, raise the temperature of the sintering furnace to 1300°C, keep it warm for 0.5h, then cool down naturally, and wait for the furnace After the temperature dropped to 200°C, the crucible was taken out and cooled to room temperature;

[0040] Step 4: crushing...

Embodiment 3

[0047] Step 1: Ingredients, weigh MgF 2 629.4g, 4MgCO 3 ·Mg(OH) 2 ·5H 2 O (basic magnesium carbonate) 1167.6g, CaCO 3 2250.5g, SiO 2 1237.4g, Gd 2 o 3 120.8g, Eu 2 o 3 52.8g, Er 2 o 3 17.2g, Dy 2 o 3 16.8g; and add 1% of the total weight of flux H 3 BO 3 ;

[0048] Step 2: Mix the ingredients. Put the raw materials in step 1 into the mixing tank according to the quality, add some agate balls, the mass ratio of the ingredients to the agate balls is 10:1, and then mix and stir at room temperature for 12 hours;

[0049] Step 3: Burning at high temperature, put the uniformly mixed materials in step 2 into the corundum crucible, then send it into the sintering furnace, the pressure is normal pressure, raise the temperature of the sintering furnace to 1300°C, keep it warm for 0.5h, then cool down naturally, and wait for the furnace After the temperature dropped to 200°C, the crucible was taken out and cooled to room temperature;

[0050] Step 4: crushing, crushing th...

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Abstract

The invention relates to a type of rare earth halosilicate red long-afterglow phosphor, and a preparation method thereof. Especially, the invention relates to a type of red long-afterglow phosphor prepared from a base material of rare-earth-modified solonetz halosilicate, and a preparation method thereof. The phosphor is characterized in the structural formula of: (1-[alpha])M,2[alpha] / 3Ln)5(SiO4)2X2:[beta]Eu<3+>,[gamma]Ln<,>, wherein M is at least one of Mg and Ca, Ln is at least one of Y, La, and Gd, X is at least one of F and Cl, Ln<,> is at least one of Dy<3+>, Er<3+>, and Bi<3+>, [alpha]=0.1 to 1, [beta]=0.03 to0.07, and [gamma]=0.001 to 0.05. According to the method, solonetz halosilicate is appropriately modified with rare earth, such that rare-earth-modified solonetz halosilicate, which has a structural formula of (M,Ln)5(SiO4)2X2 is obtained. The rare-earth-modified solonetz halosilicate is adopted as a novel base material, and a rare earth ion Eu<3+> is adopted as a luminous ion. According to the luminous ion Eu<3+>, other rare earth ions or non-rare-earth ions are selected as sensitizers, such that the red long-afterglow phosphor with a main peak wavelength of 611nm, an initial luminance of 1200mcd / m<2>, an afterglow period greater than 12 hours, and a good chemical stability is obtained.

Description

technical field [0001] The invention relates to a rare-earth halosilicate red long-lasting phosphor and a preparation method thereof, in particular to a red long-lasting phosphor using a rare-earth alkaline-earth halosilicate as a matrix material and a preparation method thereof. Background technique [0002] Long afterglow luminescent material is a new type of function that can absorb sunlight or ultraviolet light during the day and store light energy. When the light stops shining, it can slowly release the stored light energy in the form of visible light to produce continuous luminescence. Material. The material can be widely used in architectural decoration, subway passages, ship transportation, fire safety, clothing, daily consumer goods, etc. The existing rare earth long afterglow materials in the visible light region are mainly divided into blue, green, yellow-green, yellow and red luminescent materials. Blue, green, yellow-green, and yellow luminescent materials are...

Claims

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Application Information

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IPC IPC(8): C09K11/86
Inventor 钟守正曾小钉林静章
Owner LONGNANXIAN SHUNDE MINGHUI FLUORESCENT MATERIAL
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