a kind of EU 3+ Ion activated vanadium phosphoniobate red phosphor, preparation method and application thereof

A technology of red phosphor and niobate, which is applied in the field of vanadium phospho-niobate red phosphor, can solve the problems of high operation and equipment requirements, increased production cost, poor thermal stability, etc., and achieve low equipment requirements and convenient operation , the effect of strong excitation efficiency

Active Publication Date: 2021-02-26
CHANGZHOU VOCATIONAL INST OF ENG
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the existing red phosphors generally have poor thermal stability and low luminous efficiency, which cannot meet the increasingly high actual use requirements.
At the same time, the existing phosphor powder preparation process has high requirements for operation and equipment, which increases production costs

Method used

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  • a kind of EU <sup>3+</sup> Ion activated vanadium phosphoniobate red phosphor, preparation method and application thereof
  • a kind of EU <sup>3+</sup> Ion activated vanadium phosphoniobate red phosphor, preparation method and application thereof
  • a kind of EU <sup>3+</sup> Ion activated vanadium phosphoniobate red phosphor, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of Ca 0.8 Eu 0.2 Nb1.8 Ti 0.2 V 2 P 4 o 21

[0033] Weigh according to the stoichiometric ratio of each element in the chemical formula: CaCO 3 : 1.6 g, Eu 2 o 3 : 0.704 g, Nb 2 o 5 : 4.784 g, V 2 o 5 : 3.64 g, P 2 o 5 : 5.68 g, TiO 2 : 0.32 g. Put the weighed raw materials into an agate mortar and carefully grind and mix them evenly. The mixture is pre-calcined in an air atmosphere. The pre-calcination temperature is 350°C and the calcination time is 5 hours. Uniform, calcined again in the air atmosphere, the calcining temperature is 850°C, and the calcining time is 6 hours; the powder obtained in this step is naturally cooled, ground and mixed, and calcined for the third time in the air atmosphere, the calcining temperature is 1100°C, and the calcining time is for 5 hours, after natural cooling and grinding to obtain a kind of Eu 3+ Ionically activated vanadium phosphoniobate red phosphor.

[0034] See attached figure 1 , which is the X-...

Embodiment 2

[0040] Preparation of Ca 0.999 Eu 0.001 Nb 1.999 Ti 0.001 V 2 P 4 o 21

[0041] Weigh according to the stoichiometric ratio of each element in the chemical formula: Ca(NO 3 ) 2 : 3.277 g, Eu 2 o 3 : 0.004 g, Nb 2 o 5 : 5.313 g, NH 4 VO 3 : 4.68 g, NH 4 h 2 PO 4 : 9.2 g, TiO 2 : 0.0016 g. Put the weighed raw materials into an agate mortar and carefully grind and mix them evenly. Pre-calcine the mixture in an air atmosphere. The pre-calcination temperature is 300°C and the calcination time is 10 hours. Uniform, calcined again in the air atmosphere, the calcining temperature is 900°C, and the calcining time is 1 hour; the powder obtained in this step is naturally cooled, ground and mixed, and calcined for the third time in the air atmosphere, the calcining temperature is 950°C, and the calcining time is For 10 hours, after natural cooling, ground to obtain a kind of Eu 3+ Ionically activated vanadium phosphoniobate red phosphor.

[0042] Its main structure is...

Embodiment 3

[0044] Preparation of Ca 0.9 Eu 0.1 Nb 1.9 Ti 0.1 V 2 P 4 o 21

[0045] Weigh according to the stoichiometric ratio of each element in the chemical formula: CaCO 3 : 3.15 g, Eu 2 o 3 : 0.616 g, Nb 2 o 5 : 8.378 g, NH 4 VO 3 : 8.19 grams, (NH 4 ) 2 ·HPO 4 : 18.48 g, TiO 2 : 0.28g. Put the weighed raw materials into the agate mortar and carefully grind and mix them evenly, pre-calcine the mixture in the air atmosphere, the calcination temperature is 450°C, and the calcination time is 1 hour; after the obtained product is naturally cooled, mix it evenly in the agate mortar , calcined again in an air atmosphere, the calcining temperature is 450°C, and the calcining time is 10 hours; the powder obtained in this step is naturally cooled, ground and mixed, and calcined for the third time in an air atmosphere, the calcining temperature is 1250°C, and the calcining time is 1 hour, after natural cooling, grind to obtain a kind of Eu 3+ Ionically activated vanadium pho...

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Abstract

The invention discloses a Eu 3+ Ion-activated vanadium phosphoniobate red phosphor, preparation method and application thereof, its general chemical formula is Ca 1‑x Eu x Nb 2‑x Ti x V 2 P 4 o 21 , x is trivalent Eu 3+ ions and tetravalent Ti 4+ ions respectively replace Ca 2+ and Nb 5+ The number of moles of x is in the range of 0.001≤x≤0.3. The invention is synthesized by a solid-phase reaction method, and is synthesized by multiple calcining in an air atmosphere. The operation is convenient and the requirements for equipment are low. The preparation process is energy-saving and environment-friendly. The fluorescent powder provided by the present invention has a strong absorption capacity for near-ultraviolet and blue light bands, can emit red light with a wavelength of 615 nanometers after excitation, and has high luminous efficiency. Therefore, the Eu 3+ The ion-activated vanadium phosphoniobate phosphor can be well matched with near-ultraviolet and blue light semiconductor LED chips, and can be used to prepare white light LED lighting devices in combination with it.

Description

technical field [0001] The present invention relates to a kind of Eu 3+ The ion-activated vanadium phosphoniobate red fluorescent powder, its preparation method and application belong to the technical field of inorganic fluorescent powder materials. Background technique [0002] In the history of human development, there have been lighting revolutions again and again. In recent years, phosphor-based lighting has received great attention. For example, fluorescent conversion white LED devices based on semiconductor diodes are the largest green revolution in the field of lighting and display. In recent years, they have received extremely wide attention and rapid development. development of. For an ideal LED lighting device, not only high brightness is required, but also optical qualities such as low color temperature, high color rendering index, and low glare. However, the current LED lighting equipment is mostly prepared based on blue LED chips and yellow phosphor powder. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/71H01L33/50
CPCC09K11/7738H01L33/502Y02B20/00
Inventor 唐惠东杨蓉刘颖吴一凡
Owner CHANGZHOU VOCATIONAL INST OF ENG
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