Eu<3+> ion activated vanadate-phosphate-niobate red fluorescent powder, and 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: 2019-07-09
CHANGZHOU VOCATIONAL INST OF ENG
View PDF4 Cites 3 Cited by
  • Summary
  • 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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Eu&lt;3+&gt; ion activated vanadate-phosphate-niobate red fluorescent powder, and preparation method and application thereof
  • Eu&lt;3+&gt; ion activated vanadate-phosphate-niobate red fluorescent powder, and preparation method and application thereof
  • Eu&lt;3+&gt; ion activated vanadate-phosphate-niobate red fluorescent powder, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Preparation of Ca 0.8Eu 0.2 Nb 1.8 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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

PropertyMeasurementUnit
fluorescence lifetimeaaaaaaaaaa
Login to view more

Abstract

The invention discloses Eu<3+> ion activated vanadate-phosphate-niobate red fluorescent powder, and a preparation method and application thereof. The chemical general formula of the fluorescent powderis Ca<1-x>Eu<x>Nb<2-x>Ti<x>V<2>P<4>O<21>, wherein x is the molar ratio of Eu<3+> ions and tetravalent Ti<4+> ions to respectively substituted Ca<2+> and Nb<5+>, and x is greater than or equal to 0.001 and less than or equal to 0.3. The fluorescent powder is synthesized by adopting a solid-phase reaction method, and is synthesized in an air atmosphere by a plurality of times, so that operation isconvenient, the requirement for equipment is low, the preparation process saves energy and is environmentally friendly, and the obtained fluorescent powder particles are uniform in particle size and good in thermal stability. The fluorescent powder provided by the invention has strong absorption capability on near ultraviolet and blue light wave bands, can emit red light with a wavelength of 615 nm after being excited, and is high in luminescence efficiency, so that the Eu<3+> ion activated vanadate-phosphate-niobate red fluorescent powder can be well matched with near-ultraviolet and blue-light semiconductor light-emitting diode (LED) chips, and can be matched with the LED chips to prepare white light LED lighting assemblies.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(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
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap