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a kind of EU 3+ Doped fluorine niobium tantalate phosphor and its synthesis and application

A technology of niobium tantalate and phosphor, which is applied in the field of fluoroniobium tantalate phosphor and its synthesis and application, can solve the problems of low excitation efficiency and achieve strong excitation efficiency, excellent thermal stability, and enhanced cleanliness Effect

Active Publication Date: 2021-10-08
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Among the currently developed commercial red-emitting phosphors, trivalent europium Eu 3+ Ion-excited red-emitting phosphors are the most important category, mainly Y 2 o 3 :Eu 3+ , Y 2 o 2 S:Eu 3+ , but the excitation efficiency of these phosphors in the near-ultraviolet wavelength region is low

Method used

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  • a kind of EU <sup>3+</sup> Doped fluorine niobium tantalate phosphor and its synthesis and application
  • a kind of EU <sup>3+</sup> Doped fluorine niobium tantalate phosphor and its synthesis and application
  • a kind of EU <sup>3+</sup> Doped fluorine niobium tantalate phosphor and its synthesis and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1: Ca 2.8 EU 0.2 NB 2 TA 1.8 Ti 0.2 O 12 Fly 2

[0031] In accordance with the formula Ca 1.8 EU 0.2 NB 2 TA 1.8 Ti 0.2 O 12 Stoichiometric ratio of the elements Weigh: CaCO 3 : 3.6 g; Eu 2 O 3 : 0.704 g; of Nb 2 O 5 : 5.316 g; Ta 2 O 5 : 7.956 g; Ti02 2: 0.32 grams; put the weighted raw material into the agate mortar, carefully ground, give the mixture of these raw materials to pre-calcined in the air atmosphere, the calcination temperature is 850 ° C, the calcination time is 10 hours; the resulting pre-calcined raw material is again placed again The mixture was pressed into an agate mortar, and the mixture was pressed into a block, and the calcination temperature was 1400 ° C in the air atmosphere, the calcination time was 1 hour, naturally cooled, and placed in an agate mortar to become a powder shape to obtain pre-calcined mixture.

[0032] According to CA 1.8 EU 0.2 NB 2 TA 1.8 Ti 0.2 O 12 · CAF 2 CAF 2 Molar ratio weigh CAF 2 : 1.56 g and NH 4 F: 0.74 grams; ...

Embodiment 2

[0037] Example 2: CA 2.994 EU 0.006 NB 2 TA 1.994 Ti 0.006 O 12 Fly 2

[0038] CAC 1.994 EU 0.006 NB 2 TA 1.994 Ti 0.006 O 12 Chemical metrics ratio of each element: CA (NO 3 ) 2 : 19.62 grams; EU 2 O 3 : 0.0634 grams; NB 2 O 5 : 15.948 grams; TA 2 O 5 : 26.44 grams; TIO 2 : 0.029 grams; put the weighted raw material into the agate mortar, carefully ground, give the mixture of these raw materials to pre-calcined in the air atmosphere, the calcination temperature is 1 hour; the resulting pre-calcined raw material is again placed again The mixture was pressed into an agate mortar, and the mixture was pressed into a block, and the calcination temperature was 1200 ° C in the air atmosphere, the calcination time was 10 hours, naturally cooled, and placed in an agate mortar to be powdered to obtain pre-calcined mixture.

[0039] According to CA 1.994 EU 0.006 NB 2 TA 1.994 Ti 0.006 O 12 · CAF 2 CAF 2 Molar ratio weigh CAF 2 : 4.68 grams and NH 4 F: 2.22 grams; putting a pre-calcined mi...

Embodiment 3

[0041] Example 3: CA 2.7 EU 0.3 NB 2 TA 1.7 Ti 0.3 O 12 Fly 2

[0042] CAC 1.7 EU 0.3 NB 2 TA 1.7 Ti 0.3 O 12 The chemical measurement ratio of each element is priced: Caco 3 : 5.95 grams; Eu 2 O 3 : 1.848 grams; NB 2 O 5 : 9.303 grams; TA 2 O 5 : 13.15 grams; TIO 2 : 0.84 grams; put the weighted raw material into the agate mortar, carefully ground, give the mixture of these raw materials in the air atmosphere, the calcination temperature is 900 ° C, the calcination time is 3 hours; the resulting pre-calcined raw material is again placed again The mixture was pressed into an agate mortar, and the mixture was pressed into a block, and the calcination temperature was 1300 ° C in the air atmosphere, the calcination time was 4 hours, and the product obtained by the above step was naturally cooled to obtain pre-calcined.

[0043] According to CA 1.7 EU 0.3 NB 2 TA 1.7 Ti 0.3 O 12 · CAF 2 CAF 2 Molar ratio weigh CAF 2 : 2.73 grams and NH 4 F: 1.295 grams; pre-calcined mixtures and CAF ...

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Abstract

The invention discloses a Eu 3+ Doped fluorine niobium tantalate phosphor and its synthesis and application, the chemical formula of the phosphor is Ca 3‑2x Eu 2x Nb 2 Ta 2‑2x Ti 2x o 12 f 2 , x is Eu 3+ Ions and Ti 4+ ions respectively replace Ca 2+ Ions and Ta 5+ The number of moles of ions, 0.003 ≤ x ≤ 0.15, is first prepared using solid-phase synthesis to prepare the CaF-free precursor Ca 2‑2x Eu 2x Nb 2 Ta 2‑2x Ti 2x o 12 (0.003≤x≤0.15); then add calcium fluoride and ammonium fluoride to the precursor, mix thoroughly, press into blocks, and then use solid-phase synthesis and sintering to obtain it. The phosphor powder provided by the invention can well absorb near-ultraviolet light and emit red light with very pure chromaticity. The phosphor powder can be well matched with near-ultraviolet semiconductor LED chips, and is a potential method for preparing white light LED lighting devices. Red glow powder.

Description

Technical field [0001] The present invention relates to the field of inorganic fluorescent materials, particularly to an Eu 3+ Its fluoro niobium tantalate phosphor synthesis and application doped. Background technique [0002] Generally refers to an object by emitting excitation energy, electron energy absorption from the ground state to the excited state, energy is then freed to return to the ground state in the process, and the form of light radiation, the light-emitting material. Such as rare earth phosphors emitting material is the most important, rare earth phosphors compared to a corresponding non-rare earth phosphors, the luminous efficiency and light color properties are superior. Therefore, the use of rare earth phosphors in recent years more and more widespread, rapid growth in consumption. [0003] Among the rare-earth phosphor, rare earth ion is the most important activator luminescent rare earth ion has a very rich electron level, which inner 4f orbital in the cryst...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/67H01L33/50
CPCC09K11/7733H01L33/502
Inventor 乔学斌王胜家赵君亚
Owner XUZHOU NORMAL UNIVERSITY