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a tb 3+ Doped fluorine niobium tantalate phosphor and its synthesis and application

A niobium tantalate and phosphor technology is applied in the field of fluorine niobium tantalate phosphor and its synthesis and application to achieve the effects of enhanced cleanliness, good reproducibility and high luminous intensity

Active Publication Date: 2021-09-17
XUZHOU NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, green phosphors based on fluoroniobium tantalate have not been reported yet.

Method used

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

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Example 1: Ba 1.4 Ca 1.4 Tb 0.1 Li 0.1 Nb 2 Ta 2 o 12 f 2

[0029] According to the chemical formula Ba 0.9 Ca 0.9 Tb 0.1 Li 0.1 Nb 2 Ta 2 o 12 The stoichiometric ratio of each element in is weighed: BaCO 3 : 2.29 g; CaCO 3 : 1.16 g; Tb 2 o 3 : 0.366 g; Li 2 CO 3 : 0.05 g; Nb 2 o 5: 5.316 grams; Ta 2 o 5 : 8.84 grams; the weighed raw materials are put into an agate mortar, carefully ground, and the mixture of these raw materials obtained is pre-calcined in an air atmosphere, the calcination temperature is 850 ℃, and the calcination time is 10 hours; the pre-calcined raw materials obtained are placed again Grind in an agate mortar, press the obtained mixture into a block, and calcinate it twice in an air atmosphere at a temperature of 1400°C for 1 hour, cool naturally, put it into an agate mortar and grind it into a powder, and obtain a pre-calcined mixture.

[0030] According to Ba 0.9 Ca 0.9 Tb 0.1 Li 0.1 Nb 2 Ta 2 o 12 0.5BaF 2 0.5CaF ...

Embodiment 2

[0035] Example 2: Ba 1.497 Ca 1.497 Tb 0.003 Li 0.003 Nb 2 Ta 2 o 12 f 2

[0036] According to the chemical formula Ba 0.997 Ca 0.997 Tb 0.003 Li 0.003 Nb 2 Ta 2 o 12 The stoichiometric ratio of each element in is weighed: Ba(NO 3 ) 2 : 15.625 g; Ca(NO 3 ) 2 : 9.81 g; Tb 2 o 3 : 0.0317 g; Li 2 CO 3 : 0.006 g; Nb 2 o 5 : 15.948 grams; Ta 2 o 5 : 26.52 grams; the weighed raw materials are put into an agate mortar, carefully ground, and the mixture of these raw materials obtained is pre-calcined in an air atmosphere, the calcination temperature is 1200 ℃, and the calcination time is 1 hour; the pre-calcined raw materials obtained are placed again Grinding in an agate mortar, the obtained mixture is pressed into a block, and calcined for the second time in an air atmosphere. The calcination temperature is 1200 ° C, and the calcination time is 10 hours. After natural cooling, it is put into an agate mortar and ground into a powder to obtain a pre-calcined ...

Embodiment 3

[0039] Example 3: Ba 1.35 Ca 1.35 Tb 0.15 Li 0.15 Nb 2 Ta 2 o 12 f 2

[0040] According to the chemical formula Ba 0.85 Ca 0.85 Tb 0.15 Li 0.15 Nb 2 Ta 2 o 12 The stoichiometric ratio of each element in is weighed: BaCO 3 : 5.87 g; CaCO 3 : 2.975 g; Tb 2 o 3 : 1.848 g; Li 2 CO 3 : 0.19 g; Nb 2 o 5 : 9.303 grams; Ta 2 o 5 : 15.47 grams; put the weighed raw materials into an agate mortar, grind them carefully, and pre-calcine the mixture of these raw materials in an air atmosphere. The calcination temperature is 900 ° C, and the calcination time is 3 hours; Grinding in an agate mortar, pressing the obtained mixture into blocks, and calcining for the second time in an air atmosphere, the calcining temperature is 1300°C, and the calcining time is 4 hours. The product obtained in the above steps is naturally cooled to obtain a pre-calcined product.

[0041] According to Ba 0.85 Ca 0.85 Tb 0.15 Li 0.15 Nb 2 Ta 2 o 12 0.5BaF 2 0.5CaF 2 Medium BaF 2 ,...

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Abstract

The invention discloses a Tb 3+ Doped fluorine niobium tantalate phosphor and its synthesis and application, the chemical formula of the phosphor is Ba 1.5‑x Ca 1.5‑x Tb x Li x Nb 2 Ta 2 o 12 f 2 , x is Tb 3+ ions and Li + ions respectively replace Ba 2+ , Ca 2+ The number of moles of , 0.003≤x≤0.15, the first is to use the solid phase synthesis method to prepare the precursor Ba without calcium fluoride 1‑x Ca 1‑x Tb x Li x Nb 2 Ta 2 o 12 (0.003≤x≤0.15); then add barium fluoride, calcium fluoride and ammonium fluoride to the precursor, mix thoroughly, press into a block, and then use solid-phase synthesis to sinter to obtain it. The phosphor powder provided by the invention can well absorb near-ultraviolet light and emit green 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. Green glow powder.

Description

technical field [0001] The invention relates to the field of inorganic fluorescent materials, in particular to a Tb 3+ Doped fluoroniobium tantalate phosphor and its synthesis and application. Background technique [0002] Luminescence generally means that an object is excited by energy, and electrons absorb energy to transition from the ground state to the excited state, and then release energy in the process of returning to the ground state, and radiate in the form of light to realize the luminescence of the material. For example, rare earth phosphors are the most important luminescent materials. Compared with corresponding non-rare earth phosphors, rare earth phosphors have better luminous efficiency and light color performance. Therefore, the use of rare earth fluorescent materials has become more and more extensive in recent years, and the annual consumption has increased rapidly. [0003] Rare earth ions have very rich electronic energy levels, and the 4f orbitals in...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/67H01L33/50
CPCC09K11/7748H01L33/502
Inventor 乔学斌王胜家赵君亚
Owner XUZHOU NORMAL UNIVERSITY