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Titanate luminescent material and preparation method thereof

A luminescent material and titanate technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problem of insufficient luminous brightness, and achieve the effects of simple process production, wide adaptability and low equipment requirements

Active Publication Date: 2012-04-11
OCEANS KING LIGHTING SCI&TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the biggest shortcoming of this system at present is that the luminous brightness is not enough. If it is to be applied in the field of lighting, its luminous intensity needs to be further improved.

Method used

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  • Titanate luminescent material and preparation method thereof
  • Titanate luminescent material and preparation method thereof
  • Titanate luminescent material and preparation method thereof

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preparation example Construction

[0025] The preparation method of the above-mentioned titanate luminescent material, such as figure 1 As shown, the preparation process is as follows:

[0026] Step S 1. According to the general chemical formula M 1 TiO 3 · x Pr · yM 2 The stoichiometric ratio of each element in the given M 2 The nanoparticle sol, the source compound of Pr and the M 1 source compound; among them, M 1 At least one of Ca, Sr or Ba, M 2 It is at least one of Ag, Au, Pt or Pd nanoparticles, and the value of x is 5×10 -5 ~1×10 -2 , the value of y is 5×10 -7 ~1×10 -4 ;

[0027] Step S2, combining the source compound of Pr and M 1 The source compounds were dissolved in ethanol or water respectively, and configured as a solution containing Pr ions and a solution containing M 1 a solution of ions;

[0028] Step S3, the solution of Pr ions in the above configuration is divided into 5×10 -5 : 1~1×10 -2 : 1 molar ratio, added to the containing M 1 ions in solution; subsequently adding the M...

Embodiment approach 1

[0039] 1. Preparation of Pt nanoparticle sol

[0040] Weigh 5.18mg chloroplatinic acid (H 2 PtCl 6 ·6H 2 O) be dissolved in the deionized water of 15.2mL; After chloroplatinic acid dissolves completely, take by weighing 8.0mg sodium citrate and 12.0mg sodium dodecylsulfonate, and dissolve into chloroplatinic acid aqueous solution under the environment of magnetic stirring Medium; Weigh 3.8mg of sodium borohydride and dissolve it in 10mL of deionized water to obtain a concentration of 1×10 in 10mL -2 mol / L sodium borohydride aqueous solution; under the environment of magnetic stirring, the ratio of the amount of the reducing agent to the metal ion substance is 4.8:1, add 4.8mL sodium borohydride aqueous solution dropwise to the chloroplatinic acid aqueous solution, and then continue Reaction for 45min, the content of 20mL Pt is 5×10 -4 mol / L Pt nanoparticle sol.

[0041] 2. Preparation of calcium praseodymium titanate phosphor doped with Pt nanoparticles

[0042] 1) Using...

Embodiment approach 2

[0049] 1. Preparation of Ag nanoparticles sol

[0050] Weigh 17.0mg silver nitrate (AgNO 3 ) into 19.5 mL of deionized water; when the silver nitrate was completely dissolved, weigh 60 mg of sodium citrate, and dissolve it in the silver nitrate aqueous solution under magnetic stirring; dilute and prepare 10 mL of hydrazine hydrate with a concentration of 0.1 mol / L Solution; under the environment of magnetic stirring, according to the ratio of reducing agent to metal ion substance amount of 0.5:1, add 0.5mL0.1mol / L hydrazine hydrate solution to the silver nitrate aqueous solution at one time, and then continue to react for 25min , that is, the silver content of 20mL is 5×10 -3 mol / L Ag nanoparticle sol.

[0051] 2. Preparation of calcium praseodymium titanate phosphor doped with Ag nanoparticles

[0052] 1) Using absolute ethanol as a solvent, prepare 1.5mol / L Ca(NO 3 ) 2 ethanol solution and 5 x 10 -3 mol / L of Pr(NO 3 ) 3 weak;

[0053] 2) Press Pr 3+ and Ca 2+ The ...

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Abstract

The invention belongs to the field of luminescent materials, and discloses a titanate luminescent material and a preparation method thereof. The general chemical formula of the titanate luminescent material is as follows: M1TiO3.xPr.yM2, wherein M1 is selected from at least one of Ca, Sr and Ba, M2 is selected from at least one of Ag, Au, Pt and Pd nanoparticles, x is equal to 5*10<-5>-1*10<-2>, and y is equal to 5*10<-7>-1*10<-4>. The titanate luminescent material disclosed by the invention is simple in manufacturing processes and low in equipment requirements; and compared with the luminescent property of the fluorescent powder prepared without doping metal particles, the luminescent property of the fluorescent powder prepared by doping metal particles is greatly improved.

Description

technical field [0001] The invention relates to the field of luminescent materials, in particular to a titanate luminescent material. The invention also relates to a preparation method of titanate luminescent material. Background technique [0002] Since 1997, the new red long-lasting luminescent material CaTiO 3 :Pr 3+ Since it is applied to field emission display (FED), Pr 3+ Doped alkaline earth metal titanate MTiO 3 :Pr 3+ (wherein, M is at least one of Ca, Sr, and Ba) as a FED red light material with great development potential has aroused great interest and attention of researchers at home and abroad. [0003] Studies have shown that MTiO 3 :Pr 3+ The color coordinates x = 0.680, y = 0.311, is a perovskite structure system of pure red light. The wavelength of its emission peak is around 614nm, corresponding to Pr 3+ of 1 D. 2 → 3 h 4 convert. PR 3+ doped titanate MTiO 3 , on the one hand Pr 3+ Enters the host lattice to replace Ca 2+ 、Sr 2+ 、Ba 2+ L...

Claims

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Application Information

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IPC IPC(8): C09K11/87C09K11/78
Inventor 周明杰陆树新马文波
Owner OCEANS KING LIGHTING SCI&TECH CO LTD
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