Red fluorescent powder and preparation method thereof

A technology for red phosphor powder and compound, applied in the field of red phosphor powder and its preparation, can solve the problems of low quantum conversion rate, low luminous intensity, low cost, etc., and achieve the effects of high luminous intensity, uniform particle size and low synthesis temperature

Inactive Publication Date: 2015-06-10
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the low quantum conversion rate and low luminous intensity of the current red part, its practical application is greatly limited, so the research and development of new red phosphors has also become a research hotspot.
[0004] The zirconate-based fluorescent powder has high chemical stability, good radiation stability, abundant raw materials, strong impact resistance, and low cost. The present invention uses NaLaZr 2 o 6 The perovskite system was used as the research object, and a NaLaZr 2 o 6 : Eu 3+ Red fluorescent material, this kind of phosphor has not been reported yet

Method used

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  • Red fluorescent powder and preparation method thereof
  • Red fluorescent powder and preparation method thereof
  • Red fluorescent powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1) select commercially available purity as analytically pure Na 2 CO 3 , La 2 o 3 , ZrO 2 And the purity is high purity reagent Eu 2 o 3 As a reaction raw material, according to the chemical formula NaLa 0.97 Zr 2 o 6 : 0.03Eu 3+ The stoichiometric ratio is weighed, wherein, considering that the Na source will be partially burned at high temperature, so when weighing Na 2 CO 3 Weigh 1.5 times of its stoichiometric ratio;

[0031] 2) Put the weighed material into a vibrating ball mill for dry grinding and mixing, and control the output particle size at 0.3mm.

[0032] 3) Put the uniformly mixed material into an oven and dry it at 150° C. for 3 hours.

[0033] 4) Put the dried sample into a corundum crucible, place the corundum crucible in a muffle furnace, and raise it from room temperature to 600 °C at a rate of 3 °C / min in an air atmosphere, and then increase it at a rate of 5 °C / min Raise the temperature to 1300°C and keep it warm for 5 hours.

[0034] 5...

Embodiment 2

[0036] 1) select commercially available purity as analytically pure Na 2 CO 3 , La 2 o 3 , ZrO 2 And the purity is high purity reagent Eu 2 o 3 As a reaction raw material, according to the chemical formula NaLa 0.95 Zr 2 o 6 : 0.05Eu 3+ The stoichiometric ratio is weighed, wherein, considering that the Na source will be partially burned at high temperature, so when weighing Na 2 CO 3 Weigh 1.5 times of its stoichiometric ratio;

[0037]2) Put the weighed raw meal into a vibration ball mill for dry grinding and mixing, and control the output particle size at 0.2mm.

[0038] 3) Put the uniformly mixed material into an oven and dry at 150° C. for 4 hours.

[0039] 4) Put the dried sample into a corundum crucible, place the corundum crucible in a muffle furnace, and raise it from room temperature to 600 °C at a rate of 2 °C / min in an air atmosphere, and then increase it at a rate of 4 °C / min Raise the temperature to 1330°C and keep it warm for 6h.

[0040] 5) Cool do...

Embodiment 3

[0042] 1) select commercially available purity as analytically pure Na 2 CO 3 , La 2 o 3 , ZrO 2 And the purity is high purity reagent Eu 2 o 3 As a reaction raw material, according to the chemical formula NaLa 0.93 Zr 2 o 6 : 0.07Eu 3+ The stoichiometric ratio is weighed, wherein, considering that the Na source will be partially burned at high temperature, so when weighing Na 2 CO 3 Weigh 1.5 times of its stoichiometric ratio;

[0043] 2) Put the weighed material into a vibrating ball mill for dry grinding and mixing, and control the output particle size at 0.3mm.

[0044] 3) Put the uniformly mixed material into an oven and dry at 180° C. for 4 hours.

[0045] 4) Put the dried sample into a corundum crucible, place the corundum crucible in a muffle furnace, and raise it from room temperature to 600°C at a rate of 3°C / min in an air atmosphere, and then increase it to 600°C at a rate of 3°C / min. The temperature was raised to 1400°C and kept for 5 hours.

[0046] ...

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Abstract

The invention discloses red fluorescent powder and a preparation method thereof. The red fluorescent powder is prepared by taking a compound containing Na<+>, a compound containing La<3+>, a compound containing Zr<4+> and a compound containing Eu<3+> as reaction raw materials, weighing the raw materials according to a stoichiometric ratio of a chemical formula NaLa1-xZr2O6:xEu<3+>, wherein x is equal to 0.03-0.11. The zirconate based fluorescent powder prepared by the method disclosed by the invention is low in relative synthesis temperature and high in luminous intensity, has good chemical stability and a relatively wide emission spectrum, is good in particle morphology, uniform in particle size and good in dispersity, and can realize red light emission when being excited by 365nm ultraviolet light.

Description

technical field [0001] The present invention relates to fluorescent powder and preparation method thereof, be specifically related to a kind of chemical component is NaLaZr 2 o 6 : Eu 3+ Red fluorescent powder and preparation method thereof. Background technique [0002] A substance that emits light after being excited by an excitation light source such as ultraviolet light, radiation, electric field, plasma, etc., and stops emitting light quickly after the excitation is stopped is called a fluorescent substance. Rare earth ions themselves have low luminous efficiency, but form organic complexes with organic ligands with high light absorption coefficients. After absorbing light energy, organic ligands can transfer energy to rare earth ions to emit characteristic fluorescence, and become an important class of luminescent substances. Due to the unique luminescent properties of rare earth complexes, they have attracted extensive attention in the fields of luminescent materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
Inventor 史永胜陈思秋宁青菊曹舒尧
Owner SHAANXI UNIV OF SCI & TECH
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