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Strontium titanate nano red fluorescent powder doped with praseodymium or praseodymium zinc and preparation method

A technology of red fluorescent powder and strontium titanate, which is applied in the direction of chemical instruments and methods, luminescent materials, etc., to achieve the effect of energy saving

Active Publication Date: 2016-03-23
SOUTH CHINA INST OF COLLABORATIVE INNOVATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there is no report on the preparation of praseodymium or praseodymium-zinc doped strontium titanate nano-phosphor powder by combining ultrasonic and precipitation methods

Method used

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  • Strontium titanate nano red fluorescent powder doped with praseodymium or praseodymium zinc and preparation method

Examples

Experimental program
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Effect test

Embodiment 1

[0027] A preparation method of strontium titanate nano red fluorescent powder doped with praseodymium, comprising the following steps:

[0028] (1) Raw material: Weigh 1.57g of strontium chloride and 0.025g of praseodymium chloride respectively according to the stoichiometric ratio Sr:Pr:Zn=0.99:0.01:0, and dissolve them in deionized water to obtain a strontium chloride concentration of 0.1mol / L solution A;

[0029] (2) Dissolving 3.4 g of tetrabutyl titanate in absolute ethanol to form a solution B with a tetrabutyl titanate concentration of 0.1 mol / L;

[0030] (3) Take 6g of sodium hydroxide and dissolve it in 100mL deionized water to obtain sodium hydroxide solution;

[0031] (4) Add solution A and solution B to the sodium hydroxide solution in 200W ultrasonic at 0.5mL / min to form a precipitate;

[0032] (5) The precipitate was washed with water and alcohol, and then dried at 60° C. for 7 hours to obtain a spherical strontium titanate red fluorescent powder doped with pr...

Embodiment 2

[0034] A preparation method of strontium titanate nanometer red fluorescent powder doped with praseodymium zinc, comprising the following steps:

[0035] (1) Raw materials: According to the stoichiometric ratio Sr:Pr:Zn=0.98:0.02:0.2, respectively weigh 1.55g of strontium nitrate, 0.049g of praseodymium chloride and 0.27g of zinc chloride and dissolve them in deionized water to obtain strontium chloride Solution A with a concentration of 0.1mol / L;

[0036] (2) Dissolving 4.08 g of tetrabutyl titanate in absolute ethanol to form a solution B with a tetrabutyl titanate concentration of 0.12 mol / L;

[0037] (3) Take 9g of sodium hydroxide and dissolve it in 100mL deionized water to obtain a sodium hydroxide solution;

[0038] (4) Add solution A and solution B to the sodium hydroxide solution in 250W ultrasonic at 1mL / min to form a precipitate;

[0039] (5) After the precipitate was washed with water and alcohol, it was dried at 70°C for 7 hours to obtain a spherical strontium t...

Embodiment 3

[0041] A preparation method of strontium titanate nanometer red fluorescent powder doped with praseodymium zinc, comprising the following steps:

[0042] (1) Raw materials: Take by weighing 1.52g of strontium chloride hexahydrate, 0.099g of praseodymium chloride and 0.68g of zinc chloride according to the stoichiometric ratio Sr:Pr:Zn=0.96:0.04:0.5 respectively, dissolve them in deionized water, and prepare Obtain the solution A that strontium chloride concentration is 0.1mol / L;

[0043] (2) Dissolving 3.4 g of tetrabutyl titanate in absolute ethanol to form a solution B with a tetrabutyl titanate concentration of 0.1 mol / L;

[0044] (3) Take 9g of sodium hydroxide and dissolve it in 100mL deionized water to obtain a sodium hydroxide solution;

[0045] (4) Add solution A and solution B to 300W ultrasonic at 0.5mL / min to form a precipitate;

[0046] (5) The precipitate was washed with water and alcohol, and then dried at 80° C. for 8 hours to obtain a red phosphor body of str...

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Abstract

The invention belongs to the field of rare earth luminescent materials, and particularly relates to strontium titanate nano red fluorescent powder doped with praseodymium or praseodymium zinc and a preparation method. The general formula of the fluorescent powder is Sr(1-x)TiO3:xPr:yZn, wherein x is larger than or equal to 0 and smaller than or equal to 0.04, and y is larger than or equal to 0 and smaller than or equal to 0.5. The preparation method particularly comprises the steps that an aqueous solution A, a solution B and alkali liquor are prepared; the solution A and the solution B are dropwise added to the alkali liquor which is subjected to ultrasonic treatment at constant speed to obtain precipitation; the precipitation is washed through water and ethanol and then dried, and the strontium titanate nano fluorescent powder doped with the praseodymium or the praseodymium zinc is obtained. According to the strontium titanate nano red fluorescent powder doped with the praseodymium or the praseodymium zinc and the preparation method, ultrasound and precipitation are combined, the strontium titanate nano powder doped with the praseodymium or the praseodymium zinc is obtained without being calcined, the method is simple in technology, low in synthesis temperature and low in equipment requirement, the prepared powder is good in doping uniformity, the appearance is easy to control, the luminescent property is stable, and the defects of a high-temperature solid-phase synthesis method are overcome.

Description

technical field [0001] The invention belongs to the field of rare earth luminescent materials, and in particular relates to a strontium titanate nanometer red fluorescent powder doped with praseodymium or praseodymium zinc and a preparation method thereof. Background technique [0002] Red long-lasting phosphor powder is a hotspot in the research of luminescent materials at present. So far, the relatively mature red long-lasting luminescent material is sulfur oxide, represented by Y 2 o 2 S: Eu 3+ , Mg 2+ , Ti 4+ However, due to the disadvantages of poor chemical stability, easy decomposition, and environmental pollution, this kind of material limits its application. CaTiO 3 :Pr 3+ The series of luminescent materials represented by titanates just make up for the shortage of sulfur oxides, and have the advantages of good stability and pure color. [0003] The high-temperature solid-phase method is a common method for synthesizing perovskite luminescent materials. Gener...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/67
CPCC09K11/77
Inventor 李艳辉郑华德张明
Owner SOUTH CHINA INST OF COLLABORATIVE INNOVATION