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Eu<3+> ion activated tantalate fluorescent powder, and synthesis method and application thereof

A synthesis method and phosphor technology, applied in the field of tantalate phosphor and its synthesis, can solve the problems of expensive synthesis equipment, complex synthesis process, poor thermal stability, etc., achieve excellent thermal stability, simple synthesis process, and equipment requirements low effect

Active Publication Date: 2020-05-12
XUZHOU NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The effective excitation range of the existing red phosphors is mostly in the short-wave UV region, and its luminous efficiency under ultraviolet light excitation is low, the chromaticity is not pure, and the thermal stability is poor; at the same time, the synthesis process of these red phosphors is complicated and inconvenient operation, and the synthesis equipment is expensive

Method used

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  • Eu&lt;3+&gt; ion activated tantalate fluorescent powder, and synthesis method and application thereof
  • Eu&lt;3+&gt; ion activated tantalate fluorescent powder, and synthesis method and application thereof
  • Eu&lt;3+&gt; ion activated tantalate fluorescent powder, and synthesis method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] According to the chemical formula Na 1.7 Eu 0.3 Ta 1.7 Ga 0.3 NbO 6 f 5 The stoichiometric ratio of several elements in: Na 2 CO 3 : 3.71 g; Eu 2 o 3 : 5.279 grams; Ta 2 o 5 : 34.84 g; Ga 2 o 3 : 2.812 g; Nb 2 o 5 : 13.29 grams; the weighed raw material is put into an agate mortar and ground, and the mixed raw material obtained is calcined for the first time in an air atmosphere. The calcining temperature is 1250° C., and the calcining time is 5 hours;

[0027] The obtained primary calcined product was put into an agate mortar for grinding, pressed into a block, and then calcined for the second time in an air atmosphere. The calcining temperature was 1400° C. and the calcining time was 1 hour.

[0028] The obtained calcined product is cooled naturally for the second time, put into an agate mortar and grind until it becomes powdery, and the powder and the pre-weighed NaF: 4.2 grams and NH 4 F: 14.8 grams of grinding and mixing, the obtained mixture is pres...

Embodiment 2

[0034] According to the chemical formula Na 1.998 Eu 0.002 Ta 1.998 Ga 0.002 NbO 6 f 5 The stoichiometric ratio of several elements in: Na 2 CO 3 : 5.2894 g; Eu 2 o 3 : 0.035 grams; Ta 2 o 5 : 40.95 g; Ga 2 o 3 : 0.019 g; Nb 2 o 5 : 13.29 grams; the weighed raw material is put into an agate mortar and ground, and the mixed raw material obtained is calcined for the first time in an air atmosphere. The calcining temperature is 800° C., and the calcining time is 1 hour;

[0035] The obtained primary calcined product was put into an agate mortar for grinding, pressed into a block, and then calcined for the second time in an air atmosphere. The calcining temperature was 1200° C. and the calcining time was 10 hours.

[0036] The obtained calcined product is cooled naturally for the second time, put into an agate mortar and grind until it becomes powdery, and the powder and the pre-weighed NaF: 4.2 grams and NH 4 F: 14.8 grams of grinding and mixing, the obtained mixtu...

Embodiment 3

[0039] According to the chemical formula Na 1.9 Eu 0.1 Ta 1.9 Ga 0.1 NbO 6 f 5 The stoichiometric ratio of several elements in: Na 2 CO 3 : 4.77 g; Eu 2 o 3 : 1.759 grams; Ta 2 o 5 : 38.94 g; Ga 2 o 3 : 0.94 g; Nb 2 o 5 : 13.29 grams; the weighed raw material is put into an agate mortar and ground, and the mixed raw material obtained is calcined for the first time in an air atmosphere. The calcining temperature is 1000° C., and the calcining time is 10 hours;

[0040] The obtained primary calcined product was put into an agate mortar for grinding, pressed into a block, and then calcined for the second time in an air atmosphere. The calcining temperature was 1350° C. and the calcining time was 3.5 hours.

[0041] The obtained calcined product is cooled naturally for the second time, put into an agate mortar and grind until it becomes powdery, and the powder and the pre-weighed NaF: 4.2 grams and NH 4 F: 14.8 grams of grinding and mixing, the obtained mixture is p...

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Abstract

The invention relates to Eu<3+> ion activated tantalate fluorescent powder, and a synthesis method and an application thereof. The Eu<3+> ion activated tantalate fluorescent powder has a general chemical formula of Na<2-2x>Eu<2x>Ta<2-2x>Ga<2x>NbO6F5, wherein x is a mole number of Eu<3+> ions and Ga<3+> ions which replace Na<+> and Ta<5+> respectively; and x is no less than 0.001 and no more than 0.15. The synthesis method provided by the invention is a solid-phase synthesis method. The fluorescent ceramic provided by the invention can be used for preparing LED lighting or display devices taking near ultraviolet and blue light semiconductor chips as excitation light sources, and can also be used for manufacturing light-emitting diodes, display materials, three-primary-color fluorescent lamps and field emission displays. The Eu<3+> activated tantalate fluorescent powder provided by the invention has the following obvious advantages: the fluorescent powder can stably emit red light and has excellent thermal stability, high color temperature and color rendering index, high luminous efficiency and high cleanliness, and has high excitation efficiency in near ultraviolet and blue light wavelength regions.

Description

technical field [0001] The invention relates to the technical field of inorganic fluorescent materials, in particular to a Eu 3+ Ion-activated tantalate phosphor, its synthesis method and application. Background technique [0002] In recent years, with the development of semiconductor materials, semiconductor LED lighting has received great attention. Blue light and near ultraviolet light semiconductor chips have become the mainstream commercialized white light LED lighting devices; compared with traditional fluorescent lamps, energy-saving lighting and other light sources Compared with the new generation of lighting based on LED chips, it has great advantages. It has a long service life and can work for more than 50,000 hours without failure, while the power consumption is only 1 / 10 of that of incandescent lamps. It has a wide voltage range and high brightness. [0003] There are two main ways for white light LEDs to produce white light: the first is to combine red, green ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/67C09K11/85H01L33/50
CPCC09K11/7733H01L33/502
Inventor 乔学斌许臣臣王胜家邢进
Owner XUZHOU NORMAL UNIVERSITY
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