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A kind of vanadate red phosphor material and preparation method thereof

A technology of red fluorescent powder and vanadate, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., to achieve the effects of good environment, excellent luminescent performance, and simple and feasible preparation method

Inactive Publication Date: 2017-04-12
JIANGXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, judging from the phosphor powders that have been developed, there is still room for further improvement in luminous intensity and application range.

Method used

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  • A kind of vanadate red phosphor material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Embodiment 1: take by weighing Sc 2 o 3 1.0250g, NH 4 VO 3 1.9496g, Eu 2 o 3 0.0293g, Y 2 o 3 0.1882g, after mixing and grinding the above raw materials evenly, put them into a high-temperature furnace, uniformly heat from room temperature to 1000°C, keep warm for 5 hours, then naturally cool to room temperature and grind, wash the product once with NaOH dilute solution, and then use Washed twice with ionized water, filtered, and dried at 120°C to obtain the composition Sc 0.89 Y 0.1 VO 4 :Eu 3+ 0.01 , its color coordinates are (0.6530, 0.3252), and its relative brightness is 1.0000 (using itself as a standard sample, see the attached figure 1 , the following examples are all taken as the standard sample).

Embodiment 2

[0025] Embodiment 2: take by weighing Sc 2 (SO 4 ) 3 1.3858g, NH 4 VO 3 1.6711g, Eu 2 (SO 4 ) 3 0.0241g, Y 2 (SO 4 ) 3 0.1964g, Gd 2 (SO 4 ) 3 0.1226g, after mixing and grinding the above raw materials evenly, put them into a high-temperature furnace, uniformly heat from room temperature to 1000°C, keep warm for 5 hours, then cool naturally to room temperature and grind, wash the product with NaOH dilute solution for 3 times, and then use Wash 5 times with ionized water, filter, and dry at 120°C to obtain the composition Sc 0.84 Y 0.1 Gd 0.05 VO 4 :Eu 3+ 0.01 , its color coordinates are (0.6518, 0.3280), and its relative brightness is 1.0832.

Embodiment 3

[0026] Embodiment 3: take by weighing Sc (NO 3 ) 3 1.6378g, Y(NO 3 ) 3 0.1250g, Gd(NO 3 ) 3 0.3121g, La(NO 3 ) 3 0.1477g, V 2 o 5 0.8267g, Eu(NO 3 ) 3 0.0307g, Sm(NO 3 ) 3 0.0306g, after mixing and grinding the above raw materials, put them into a high-temperature furnace, uniformly heat from room temperature to 1100°C, keep warm for 4 hours, then naturally cool to room temperature and grind, wash the product with NaOH dilute solution for 3 times, and then use Wash 4 times with ionic water, filter, and dry at 120°C to obtain the composition Sc 0.78 Y 0.05 Gd 0.1 La 0.05 VO 4 :Eu 3+ 0.01 ,Sm 3+ 0.01 , its color coordinates are (0.6590, 0.3262), and its relative brightness is 1.1202.

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Abstract

The present invention discloses a vanadate base red phosphor material and a preparation method thereof. The vanadate base red phosphor material has a chemical general formula of Sc1-x-y-m-nLnxVO4:Eu<3+>ySm<3+>mAl<3+>n, wherein x is more than 0 and is less than or equal to 0.5, y is more than or equal to 0.01 and is less than or equal to 0.15, m is more than or equal to 0 and is less than or equal to 0.05, n is more than or equal to 0 and is less than or equal to 0.02, a ratio of Ln to Sc to V to Eu to Sm to Al is x:(1-x-y-m-n):1:y:m:n, and Ln is at least one selected from Y, La, Gd and Lu. Raw materials are subjected to mixing, grinding, high temperature calcination, post-treatment and other processes to obtain the finished product. The vanadate base red phosphor material has strong excitation in ultraviolet and blue light regions, wherein the material can emit bright red light under ultraviolet and blue light excitation. In addition, the process is simple, and the synthesized rear earth vanadate material has characteristics of high purity and good luminescence effect.

Description

technical field [0001] The invention belongs to the technical field of fluorescent powder for LED lamps, and relates to a vanadate red fluorescent powder material and a preparation method thereof. Background technique [0002] Since the advent of white LEDs (Light-emitting Diodes) with GaN chips in 1997, white LEDs, as a new type of solid cold light source, have the advantages of high brightness, low energy consumption, long life, no pollution, and shock resistance. It is called the fourth-generation light source after incandescent lamps, fluorescent lamps and high-pressure gas discharge lamps or the 21st century green light source. At present, the more mature way to realize white LED is to coat the blue LED chip with YAG yellow phosphor that can be excited by blue light, but this method lacks red component and its color rendering is not good. Therefore, in recent years, the research on coating three primary colors on violet or ultraviolet LED chips to realize white light e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/82
Inventor 叶信宇吴龙吴迪杨明杨幼明聂华平杨斌
Owner JIANGXI UNIV OF SCI & TECH
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