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Titanate red fluorescence powder activated by europium ions Eu<3+> as well as preparation method and application of titanate red fluorescence powder

A technology of red fluorescent powder and europium ions, which is applied in the field of inorganic fluorescent materials and displays, can solve the problems of low glare, cool color, low color temperature, etc., and achieve the effect of strong rigidity and good thermal stability

Active Publication Date: 2019-05-17
CHANGZHOU VOCATIONAL INST OF ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For an ideal LED lighting device, not only high brightness is required, but also optical quality such as low color temperature, high color rendering index, and low glare; current LED lighting devices are mostly prepared based on blue LED chips and yellow phosphor powder Its obvious disadvantage is that the color temperature is not enough, showing obvious cool colors

Method used

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  • Titanate red fluorescence powder activated by europium ions Eu&lt;3+&gt; as well as preparation method and application of titanate red fluorescence powder
  • Titanate red fluorescence powder activated by europium ions Eu&lt;3+&gt; as well as preparation method and application of titanate red fluorescence powder
  • Titanate red fluorescence powder activated by europium ions Eu&lt;3+&gt; as well as preparation method and application of titanate red fluorescence powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Preparation of LaY 0.7 Eu 0.3 Ti 6 o 15

[0030] According to the chemical formula LaY 0.7 Eu 0.3 Ti 6 o 15 The stoichiometric ratio of each element in is weighed as La 2 o 3 : 1.63g, Y(NO 3 ) 3 ·6H 2 O: 2.68 g, Eu(NO 3 ) 3 ·6H 2 O: 1.34 g, tetrabutyl titanate: 20.42 g. Will weigh La 2 o 3 Dissolve in an appropriate amount of nitric acid solution, dilute with 5 times its volume of deionized water, and stir. Eu(NO 3 ) 3 ·6H 2 O and Y (NO 3 ) 3 ·6H 2 O was dissolved in deionized water, respectively. Secondly, after the dissolution is complete, citric acid twice the molar mass of the cation is added to the solution, and stirred until a transparent solution is formed. The weighed tetrabutyl titanate and 2 times the mass of glacial acetic acid were mixed and stirred for a certain period of time, and then added dropwise to ethanol to adjust the pH value to 2, and stirred until a transparent sol was formed. The four mixed solutions were slowly mixed t...

Embodiment 2

[0037] Preparation of LaY 0.5 Eu 0.5 Ti 6 o 15

[0038] According to the chemical formula LaY 0.5 Eu 0.5 Ti 6 o 15 The stoichiometric ratio of each element in is weighed as La 2 o 3 : 1.63 g, Y 2 o 3 : 0.56 g, Eu(NO 3 ) 3 ·6H 2 O: 2.25 g, tetrabutyl titanate: 20.4192 g. La to be weighed 2 o 3 , Y 2 o 3 respectively dissolved in an appropriate amount of nitric acid solution, diluted with 5 times its volume of deionized water, and stirred. Eu(NO 3 ) 3 ·6H 2 O was dissolved in deionized water. Secondly, after the dissolution is complete, oxalic acid with three times the molar mass of the cation is added to the solution, and stirred until a transparent solution is formed. The weighed tetrabutyl titanate and 1 times the mass of glacial acetic acid were mixed and stirred for a certain period of time, and then added dropwise to ethanol to adjust the pH value to 2, and stirred until a transparent sol was formed. Slowly mix the four mixed solutions together and ...

Embodiment 3

[0040] Preparation of LaY 0.995 Eu 0.005 Ti 6 o 15

[0041] According to the chemical formula LaY 0.995 Eu 0.005 Ti 6 o 15 The stoichiometric ratio of each element in , respectively weigh La(NO 3 ) 3 ·6H 2 O: 4.33 grams, Y (NO 3 ) 3 ·6H 2 O: 3.81 g, Eu 2 o 3 : 0.009 grams, tetrabutyl titanate: 20.4192 grams. Eu will be weighed 2 o 3 Dissolve in an appropriate amount of nitric acid solution, dilute with 5 times its volume of deionized water, and stir. La(NO 3 ) 3 ·6H 2 O, Y (NO 3 ) 3 ·6H 2 O was dissolved in deionized water. Secondly, after the dissolution is complete, citric acid with 1 times the molar mass of the cation is respectively added into the solution, and stirred until a transparent solution is formed. The weighed tetrabutyl titanate and 3 times the mass of glacial acetic acid were mixed and stirred for a certain period of time, and then added dropwise to ethanol to adjust the pH value to 2, and stirred until a transparent sol was formed. Th...

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Abstract

The invention relates to titanate red fluorescence powder activated by europium ions Eu<3+> as well as a preparation method and application of the titanate red fluorescence powder, and belongs to thetechnical field of inorganic luminescent materials. A chemical formula of the titanate red fluorescence powder is LaY1-xEuxTi6O15, wherein x represents the mole number of trivalent europium ions Eu<3+> substituting Y<3+> ions; and a value range of the x is characterized in that the x is more than or equal to 0.001 and is less than or equal to 0.5. According to the invention, the titanate red fluorescence powder is synthesized and prepared by a chemical solution method; and the prepared red fluorescence powder is uniform in particles, good in chemical stability and high in excitation efficiency, can be matched with near-ultraviolet and blue-light LED (Light Emitting Diode) chips, and is a potential red fluorescence powder raw material for preparing white-light LEDs.

Description

technical field [0001] The invention belongs to the field of inorganic fluorescent materials and display technology, in particular to a europium ion Eu 3+ Activated titanate red phosphor, preparation method and application thereof. Background technique [0002] In recent years, phosphor-converted white LED devices have been widely used in lighting and display fields. For an ideal LED lighting device, not only high brightness is required, but also optical quality such as low color temperature, high color rendering index, and low glare; current LED lighting devices are mostly prepared based on blue LED chips and yellow phosphor powder Of course, its obvious disadvantage is that the color temperature is insufficient, showing obvious cool colors. [0003] The use of red phosphor can significantly improve the color rendering index of lighting equipment, but also can reduce the color temperature, so its research and development has received more and more attention. where Eu 3+...

Claims

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Application Information

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IPC IPC(8): C09K11/78H01L33/50
Inventor 唐惠东杨蓉
Owner CHANGZHOU VOCATIONAL INST OF ENG