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

A technology of fluorescent ceramics and synthesis methods, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of complex synthesis process, low luminous efficiency and poor thermal stability of red fluorescent ceramics, and achieve excellent thermal stability and simple synthesis process. , the effect of strong excitation efficiency

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

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Problems solved by technology

[0004] The effective excitation range of the existing red fluorescent ceramics is mostly in the short-wave UV region, and its luminous efficiency is low under ultraviolet light excitation, the chromaticity is not pure, and the thermal stability is poor; at the same time, the synthesis process of these red fluorescent ceramics 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 ceramic, and synthesis method and application thereof
  • Eu&lt;3+&gt; ion activated tantalate fluorescent ceramic, and synthesis method and application thereof
  • Eu&lt;3+&gt; ion activated tantalate fluorescent ceramic, and synthesis method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] According to the chemical formula Na 1.8 Eu 0.2 Ta 6 o 15 f 2 The stoichiometric ratio of several elements in: Na 2 CO 3 : 1.908 g; Eu 2 o 3 : 0.704 grams; Ta 2 o 5 : 24.59 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 1100° C., and the calcining time is 5 hours;

[0028] 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 8 hours.

[0029] The obtained calcined product is cooled naturally for the second time, put into an agate mortar and grind until it becomes powder, and the powder and 1.48 grams of NH 4 F is ground and mixed, and the obtained mixture is pressed into a block, and then calcined for the third time in an air atmosphere, the calci...

Embodiment 2

[0035] According to the chemical formula Na 1.998 Eu 0.002 Ta 6 o 15 f 2 The stoichiometric ratio of several elements in: Na 2 CO 3 : 2.118 grams; Eu 2 o 3 : 0.007 grams; Ta 2 o 5 : 24.59 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 820° C., and the calcining time is 10 hours;

[0036] 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 13.5 hours.

[0037]The obtained calcined product is cooled naturally for the second time, put into an agate mortar and grind until it becomes powder, and the powder and 1.48 grams of NH 4 F is ground and mixed, and the obtained mixture is pressed into a block, and then calcined for the third time in an air atmosphere,...

Embodiment 3

[0040] According to the chemical formula Na 1.9 Eu 0.1 Ta 6 o 15 f 2 The stoichiometric ratio of several elements in: Na 2 CO 3 : 2.014 g; Eu 2 o 3 : 0.3519 grams; Ta 2 o 5 : 24.59 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 1350° C., and the calcining time is 1.5 hours;

[0041] 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 1500° C. and the calcining time was 1 hour.

[0042] The obtained calcined product is cooled naturally for the second time, put into an agate mortar and grind until it becomes powder, and the powder and 1.48 grams of NH 4 F is ground and mixed, and the obtained mixture is pressed into a block, and then calcined for the third time in an air atmosphere, the cal...

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Abstract

The invention relates to Eu<3+> ion activated tantalate fluorescent ceramic, and a synthesis method and an application thereof. The fluorescent ceramic has a chemical general formula of Na<2-2x>Eu<2x>Ta6O15F2, wherein x is a molar ratio of Eu<3+> that dopes and substitutes Na<+>, and x is no less than 0.001 and no more than 0.1. The synthesis method provided by the invention comprises the following steps: according to the stoichiometric ratio of elements in the chemical formula, weighing compounds containing ions of the elements, carrying out grinding for three times and calcining for two times on a compound containing sodium ions, a compound containing europium ions and a compound containing tantalum ions in the weighed raw materials, mixing obtained compounds with a compound containing fluorine ions, carrying out calcining fo the third time, and carrying out natural cooling so as to manufacture the Eu<3+> ion activated tantalate fluorescent ceramic. The fluorescent ceramic provided by the invention has excellent thermal stability, can efficiently emit red light, has high excitation efficiency in near ultraviolet and blue light wavelength regions, and is applicable to being matched with a near ultraviolet LED chip to prepare white-light LED lighting equipment.

Description

technical field [0001] The invention relates to the technical field of inorganic fluorescent materials, in particular to a Eu 3+ Ion-activated tantalate fluorescent ceramics and 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 LED to produce white light: the first is to combi...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/622C09K11/77
CPCC04B35/495C04B35/622C09K11/7733C04B2235/9646C04B2235/3201C04B2235/3224C04B2235/445C04B2235/6583C04B2235/661
Inventor 乔学斌许臣臣王胜家邢进
Owner XUZHOU NORMAL UNIVERSITY