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Ultraviolet or near ultraviolet inspired LED fluorescent powder and preparation method thereof

A phosphor and tungstate technology, which is applied in the field of ultraviolet or near-ultraviolet excited LED phosphor and its preparation, can solve the problems of less research on doping, and achieve the effects of simple preparation process, easy control of conditions, and cost reduction

Inactive Publication Date: 2013-10-23
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Tungstate has attracted more and more attention as an inorganic fluorescent material because of its good chemical stability and high luminous efficiency. At present, tungstate fluorescent materials are mostly rare earth doped materials, and other ions such as transition metal ions are doped. less research

Method used

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  • Ultraviolet or near ultraviolet inspired LED fluorescent powder and preparation method thereof
  • Ultraviolet or near ultraviolet inspired LED fluorescent powder and preparation method thereof
  • Ultraviolet or near ultraviolet inspired LED fluorescent powder and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0021] Embodiment 1: Cd 0.9992 WO 4 :Sb 3+ 0.0002 Eu 3+ 0.0006 Preparation of single-matrix tungstate phosphor

[0022] 1) Weigh 0.0006g antimony oxide (Sb 2 o 3 ), 0.0021g europium oxide (Eu 2 o 3 ), 6.1645g cadmium nitrate (Cd(NO 3 ) 2 4H 2 O), 6.5974g sodium tungstate (Na 2 WO 4 2H 2 o).

[0023] 2) Use concentrated nitric acid to completely dissolve antimony oxide (Sb 2 o 3 ) and europium oxide (Eu 2 o 3 ), were formulated into antimony nitrate and europium nitrate solutions, and zinc nitrate (Cd(NO 3 ) 2 4H 2 O) and sodium tungstate (Na 2 WO 4 2H 2 O) were dissolved in distilled water to prepare their own solutions.

[0024] 3) Fully mix antimony nitrate, europium nitrate and cadmium nitrate solutions, and add sodium tungstate solution drop by drop under constant stirring. After the dropwise addition is completed, continue stirring for 30 minutes to form a tungstate precipitate, suction filter, and dry at 60°C , prepared as a precursor;

[0025...

Embodiment 2

[0026] Embodiment 2: Cd 0.992 WO 4 :Sb 3+ 0.002 Eu 3+ 0.006 Preparation of single-matrix tungstate phosphor

[0027] 1) Weigh 0.0058g antimony oxide (Sb 2 o 3 ), 0.0211g europium oxide (Eu 2 o 3 ), 6.1200g cadmium nitrate (Cd(NO 3 ) 2 4H 2 O), 6.5974g sodium tungstate (Na 2 WO 4 2H 2 o).

[0028] 2) Use concentrated nitric acid to completely dissolve antimony oxide (Sb 2 o 3 ) and europium oxide (Eu 2 o 3 ), were formulated into antimony nitrate and europium nitrate solutions, and zinc nitrate (Cd(NO 3 ) 2 4H 2 O) and sodium tungstate (Na 2 WO 4 2H 2 O) were dissolved in distilled water to prepare their own solutions.

[0029] 3) Fully mix antimony nitrate, europium nitrate and cadmium nitrate solutions, add sodium tungstate solution drop by drop under continuous stirring, after the dropwise addition is completed, continue stirring for 40 minutes, and tungstate precipitate will be formed Suction filtration, drying at 80 °C , prepared as a precursor;...

Embodiment 3

[0031] Embodiment three: Cd 0.9894 WO 4 :Sb 3+ 0.01 Eu 3+ 0.0006 Preparation of single-matrix tungstate phosphor

[0032] 1) Weigh 0.0292g antimony oxide (Sb 2 o 3 ), 0.0021g europium oxide (Eu 2 o 3 ), 6.1040g cadmium nitrate (Cd(NO 3 ) 2 4H 2 O), 6.5974g sodium tungstate (Na2WO 4 2H2 o).

[0033] 2) Use concentrated nitric acid to completely dissolve antimony oxide (Sb 2 o 3 ) and europium oxide (Eu 2 o 3 ), were formulated into antimony nitrate and europium nitrate solutions, and zinc nitrate (Cd(NO 3 ) 2 4H 2 O) and sodium tungstate (Na 2 WO 4 2H 2 O) were dissolved in distilled water to prepare their own solutions.

[0034] 3) Fully mix antimony nitrate, europium nitrate and cadmium nitrate solutions, add sodium tungstate solution drop by drop under continuous stirring, after the dropwise addition is completed, continue stirring for 40 minutes, and tungstate precipitate will be formed Suction filtration, drying at 80 °C , prepared as a precursor;...

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Abstract

The invention discloses an ultraviolet or near ultraviolet inspired LED fluorescent powder and a preparation method thereof. The preparation method includes the following steps: weighing materials according to chemical expression of the fluorescent powder, namely Cd1-x-yWO4:Sb3, Eu3+y, wherein x is more than 0 and smaller than or equal to 0.03, and y is more than 0 and smaller than or equal to 0.05; respectively dissolving a compound containing Sb3+ and Eu3+ into bismuth nitrate and europium nitrate solution, and respectively dissolving a compound containing Cd2+ and WO42- into respective solutions; fully mixing antimony nitrate, europium nitrate and cadmium salt solution, and then adding tungstate solution; after finishing instilment, filtering tungstate sediment formed by the process, drying to prepare a precursor, grinding the precursor, then putting the precursor into a crucible and burning in air; after cooling the precursor to the indoor temperature, taking out and grinding the precursor to obtain samples. The tungstate fluorescent powder can emit blue light when being inspired by ultraviolet, or emit yellow light when being inspired by near ultraviolet, so as to be used for LEDs with different color requirements.

Description

technical field [0001] The invention relates to an inorganic luminescent material and a preparation method thereof, in particular to an ultraviolet or near ultraviolet excited LED fluorescent powder and a preparation method thereof. Background technique [0002] White LED is called the fourth generation of green lighting source, which has many advantages compared with traditional incandescent and fluorescent lamps, such as small size, long life, durable, stable performance, fast response, impact resistance, etc. There are a wide range of applications in lighting, display, indicator lights, signal lights and other fields. There are three ways to produce white light by using phosphor powder: blue light chip with yellow phosphor powder; blue light chip with red and green phosphor powder; ultraviolet light chip with red, green and blue three primary color phosphor powder. The current commercialization is mainly blue LED chips and YAG:Ce 3+ A single-chip white light LED made o...

Claims

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Application Information

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IPC IPC(8): C09K11/68
Inventor 师进生王丽丽姚慧民
Owner QINGDAO AGRI UNIV
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