Unlock instant, AI-driven research and patent intelligence for your innovation.

A kind of rare earth borotungstate fluorescent powder and its preparation method and application

A boro-tungstate and phosphor technology, applied in the field of inorganic light-emitting materials and their preparation, can solve the problems of color re-absorption and difficulty in ratio regulation and the like

Active Publication Date: 2018-08-14
佛山市华力达材料科技有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of the shortcomings of the above-mentioned prior art, the object of the present invention is to provide a rare earth boron tungstate phosphor with excellent luminescence performance, stable physical and chemical properties, simple preparation process, and adjustable emission color under ultraviolet to blue light excitation and Its preparation method and application are aimed at solving the technical problems of multi-component phosphors in the prior art, such as color reabsorption and difficulty in ratio control caused by component differences.

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
  • A kind of rare earth borotungstate fluorescent powder and its preparation method and application
  • A kind of rare earth borotungstate fluorescent powder and its preparation method and application
  • A kind of rare earth borotungstate fluorescent powder and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] Preparation of Gd 1.84 Eu 0.16 B 2 WO 9 Phosphor powder

[0069] According to the chemical formula Gd 1.84 Eu 0.16 B 2 WO 9 , respectively weighed gadolinium oxide Gd 2 o 3 : 3.3350g, europium oxide Eu 2 o 3 : 0.2815g, tungsten oxide WO 3 : 2.3184g, boric acid H 3 BO 3 : 1.2367g. The weighed raw materials were placed in an agate mortar and thoroughly ground and mixed evenly, then the mixture was transferred to a crucible, and put into a muffle furnace for pre-calcination under an air atmosphere. The pre-calcination temperature was 600 ° C, and the roasting time was 8 hours. After the pre-calcined raw materials are cooled, they are fully ground and mixed again, and after grinding, they are roasted in an air atmosphere at a roasting temperature of 900° C. and a roasting time of 16 hours. After cooling, the powdery rare earth boron tungstate phosphor can be obtained.

[0070] The luminescent material sample obtained above was tested for phase structure, an...

Embodiment 2

[0074] Preparation of Gd 1.70 Eu 0.20 Tb 0.10 B 2.05 WO 9 Phosphor powder

[0075] According to the chemical formula Gd 1.70 Eu 0.20 Tb 0.10 B 2.05 WO 9 , respectively weighed terbium oxide Tb 4 o 7 : 0.1869g, europium oxide Eu 2 o 3 : 0.3519g, gadolinium nitrate Gd (NO 3 ) 3 : 5.8355g, ammonium metatungstate (NH 4 ) 6 h 2 W 12 o 40 : 2.4636g, boric acid H 3 BO 3 : 1.2985g. The weighed raw materials were placed in an agate mortar and thoroughly ground and mixed evenly. Then the mixture was transferred to a crucible, and put into a muffle furnace for pre-calcination under air atmosphere, the pre-calcination temperature was 600° C., and the calcination time was 8 hours. After the pre-fired raw material is cooled, it is fully ground again. After grinding, it is roasted in an air atmosphere. The roasting temperature is 900 ° C, and the roasting time is 16 hours. After cooling, the powdery rare earth boron tungstate is obtained. Phosphor.

[0076] The above...

Embodiment 3

[0080] Preparation Y 1.96 Eu 0.04 B 2.10 WO 9 Phosphor powder

[0081] According to chemical formula Y 1.96 Eu 0.04 B 2.10 WO 9 , respectively weighed yttrium oxide Y 2 o 3 : 2.2129g, europium nitrate Eu(NO 3 ) 3 : 0.1352g, tungsten oxide WO 3 : 2.3184g, boric acid H 3 BO 3 : 1.3604g. The weighed raw materials were placed in an agate mortar and thoroughly ground and mixed uniformly, then the mixture was transferred to a crucible, and placed in a muffle furnace for pre-calcination under an air atmosphere, and baked at a temperature of 600°C for 8 hours. After the pre-calcined raw material is cooled, it is fully ground again, and then roasted in an air atmosphere at a temperature of 900° C. for 16 hours. After cooling, the powdery rare earth boron tungstate phosphor can be obtained.

[0082] The above obtained samples were tested for phase structure, and obtained as follows: Figure 9 X-ray diffraction pattern of the sample shown. X-ray diffraction test results...

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

No PUM Login to View More

Abstract

The invention discloses rare earth boron tungstate fluorescent powder as well as a preparation method and application thereof. The fluorescent powder has a chemical general formula of R2-2x-2y-2zEu2xSm2yTb2zB2mWO9, wherein R is at least one of La3+, Ce3+, Pr3+, Nd3+, Gd3+, Dy3+, Ho3+, Er3+, Tm3+, Yb3+, Lu3+, Sc3+ and Y3+; x is more than or equal to 0.0001 but less than 0.90; y is more than or equal to 0.0001 but less than 0.80; z is more than or equal to 0.0001 but less than 0.85; m is more than or equal to 1.0 but less than 1.2. The fluorescent powder is good in degree of crystallinity, high in luminous efficiency and stable in physical and chemical properties and can be used from ultraviolet light to blue light as an excitation light source, the white light emission of a single-component inorganic luminescent material is realized, and the application requirements for an LED lighting source are met; the preparation method is simple in process, low in production cost and easy for industrial production.

Description

technical field [0001] The invention relates to an inorganic luminescent material and its preparation method and application field, in particular to a rare earth boron tungstate fluorescent powder and its preparation method and application. Background technique [0002] The solid-state white light source of light-emitting diodes (LEDs) is recognized as the fourth-generation lighting source beyond incandescent lamps, fluorescent lamps, and high-pressure gas discharge lamps because of its high efficiency, energy saving, environmental protection, compactness, durability, and safety. It is more and more widely used in lighting and display fields. At present, the schemes of making white light sources based on LED chips and phosphors can be basically divided into two categories, namely: (1) combination of blue LED chips and single / multi-color phosphors; (2) ultraviolet / near-ultraviolet LED chips and Multi-color phosphor combination. Phosphor powder is the core component of solid...

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 Patents(China)
IPC IPC(8): C09K11/78H01L33/50
CPCC09K11/778C09K11/7797H01L33/502Y02B20/00
Inventor 钟华龙李怀勇任小珍徐志军初瑞清
Owner 佛山市华力达材料科技有限公司