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Red long persistence luminescent materials and their synthesis process and use

A long-lasting luminous and red technology, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of application limitations, and achieve the effect of early maturity and quality optimization of crops

Inactive Publication Date: 2008-10-01
HUNAN NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, alkaline earth metal sulfides will produce deliquescence in the air, so the application of this type of light conversion agent is limited

Method used

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  • Red long persistence luminescent materials and their synthesis process and use
  • Red long persistence luminescent materials and their synthesis process and use
  • Red long persistence luminescent materials and their synthesis process and use

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0050] Example 1: Ca 2 Zn 4 Ti 15 o 36 : Pr, Na (marked as A)

[0051] Method 1: Press CaCO 3 :ZnO:TiO 2 =1:2:7.5 (molar ratio) Weigh 0.8g CaCO 3 , 1.296g ZnO, 4.8gTiO 2 After fully grinding, add 1.6×10 -5 mol of Pr(NO 3 ) 3 solution, 1.6×10 -5 mol of NaNO 3 , dried and loaded into a quartz crucible or a corundum crucible. Burn at 1200°C for 48-96 hours, cool and grind to obtain the sample;

[0052] Method 2: Or put the material into a small quartz crucible or corundum crucible, coat a large quartz crucible or corundum crucible, and fill the interlayer with Fe 3 o 4 As a microwave absorbing medium, place it in a 2700W industrial microwave oven for 1 to 2 hours, gradually cool it, and grind it to obtain the sample.

[0053] Method 3: (1) 0.472g Ca(NO 3 ) 2 4H 2 O+1.188g Zn(NO 3 ) 2 ·6H 2 O+0.2ml 2×10 -5 mol / ml of Pr(NO 3 ) 3 Solution+0.2ml 2×10 -5 mol / ml NaNO 3 Solution obtains mixed solution (I), and the superfluous water of heating evaporation concen...

example 2

[0056] Example 2: Ca 2 Zn 4 Ti 15 o 36 : Pr, Al (marked as B)

[0057] Weigh CaCO according to stoichiometric ratio 3 0.8g, ZnO1.296g, TiO 2 4.8g, 0.0936gAl(OH) 3 . Join 1.6×10 -5 mol of Pr(NO) 3 , 1.6×10 -5 mol of NaNO 3 Mix well with an appropriate amount of ethanol, air-dry naturally, put into a quartz crucible or corundum crucible, and burn at 1200°C for 48-96h. Gradually cooled to obtain the sample.

[0058] Doped with Al 3+ The luminous intensity of the product is significantly improved, Figure 4 It is the red light emission intensity comparison of (A) (B).

example 3

[0059] Example 3: Ca 1.5 Sr 0.5 Zn 4 Ti 15 o 36 : Pr, Na (marked as C)

[0060] by CaCO 3 : SrCO 3 :ZnO:TiO 2 =1.5:0.5:4:15 (molar ratio), weigh 0.6g CaCO 3 , 0.269gSrCO 3 , 1.296gZnO, 4.8gTiO 2 After fully grinding, add 1.6×10 -5 mol of Pr(NO) 3 , 1.6×10 -5 mol of NaNO 3 , dried and loaded into a quartz crucible or a corundum crucible. Burn at 1200°C for 48-96 hours, cool and grind to obtain the sample.

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Abstract

The invention discloses a red long persistence luminescent materials, their synthesis process and use thereof, wherein the luminescent material employs alkaline earth metal titanate as substrate, Pr3++ as activator, other rare earth ions as co-activator, IIIA ions as sensitizing agent, and the preparing process consists of weighing by proportion, charging right amount of H3BO3, Pr(NO)3, NaNO, and one step synthesizing through high temperature solid phase reaction.

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and is a Pr 3+ Ion as activator, Mg 2-m-n-k Ca m Sr n Ba k Zn 4 Ti 15 o 36 A red long-lasting luminescent material as a matrix, its synthesis method and application. Background technique [0002] Matsuzawa T reported SrAl 2 o 4 :Eu 2+ , Dy 3+ After the ultra-long afterglow phenomenon of , rare earth doped long afterglow materials have aroused great interest. From the perspective of chromaticity, as long as there are three primary colors (red, green, blue) long-lasting luminescent materials with stable chemical properties, similar afterglow intensity and decay time, they can be mixed in a certain proportion to obtain long-lasting light of any color. Persistence material, otherwise the blend material's persistence color changes during decay. The rare earth ion-doped alkaline earth aluminum (silicate) green long afterglow and blue long afterglow luminescent materials have ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/78
Inventor 廉世勋李秀英
Owner HUNAN NORMAL UNIVERSITY