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Fluoride red fluorescent powder for blue-ray excited white-light LED and preparation method thereof

A red phosphor, blue light excitation technology, applied in chemical instruments and methods, luminescent materials, electrical components, etc., can solve the problem of no further modified luminescent properties of the product, and achieve the effect of simple process

Active Publication Date: 2018-05-08
广西经正科技开发有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods can be used to synthesize Mn 4+ Doped with fluoride red phosphor, but there is no report of further modification of the obtained product to improve its luminescent performance

Method used

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  • Fluoride red fluorescent powder for blue-ray excited white-light LED and preparation method thereof
  • Fluoride red fluorescent powder for blue-ray excited white-light LED and preparation method thereof
  • Fluoride red fluorescent powder for blue-ray excited white-light LED and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Embodiment 1. Preparation [K 2 TiF 6 :0.06Mn 4+ ,0.02NaF]

[0033] Take 12.0 mL HF solution (mass concentration 40%) (V HF / W K2TiF6 = 1.0 mL / g ), 6.00g KF 2H2 O (W KF / W K2TiF6 = 0.5), 0.7414 g (3 mmol) K 2 MnF 6 The powder was placed in a 50 mL plastic beaker, and stirred with a magnetic stirrer at room temperature and pressure until the solid raw materials were completely dissolved to obtain a golden yellow transparent solution. Then 12.00 g (50.0 mmol) K 2 TiF 6 The powder was added to the above solution (K 2 MnF 6 / K 2 TiF 6 molar ratio, x =0.06), stirred and reacted at normal temperature and pressure for 90 min, filtered under reduced pressure, and then added dropwise 1.0 mL of 1 mol / L NaNO to the above reaction mixture under stirring 3 The solution was stirred for 30 min, filtered under reduced pressure, and washed 3 times with a small amount of absolute ethanol. Dry the filter cake at 80 °C for 4 h, grind the dried filter cake into powder, an...

Embodiment 2

[0035] Embodiment 2. preparation [Na 2 TiF 6 :0.03Mn 4+ ,0.01KF]

[0036] Take 9.4 mL HF solution (mass concentration 40%) (V HF / W Na2TiF6 = 0.9 mL / g ), 2.08g NaF (W NaF / W Na2TiF6 = 0.2), 0.3707 g (1.5 mmol) K 2 MnF 6 The powder was placed in a 50 mL plastic beaker, and stirred with a magnetic stirrer at room temperature and pressure until the solid raw materials were completely dissolved to obtain a golden yellow transparent solution. Then 10.40 g (50.0 mmol) Na 2 TiF 6 The powder was added to the above solution (K 2 MnF 6 / Na 2 TiF 6 molar ratio, x =0.03), stirred and reacted at normal temperature and pressure for 80 min, filtered under reduced pressure, and then added dropwise 0.5 mL of 1mol / L KNO 3 The solution was stirred for 50 min, filtered under reduced pressure, and washed 3 times with a small amount of absolute ethanol. The filter cake was dried at 80 °C for 6 h, and the dried filter cake was ground into powder, and the obtained orange powder w...

Embodiment 3

[0038] Embodiment 3. preparation [K 2 SiF 6 :0.04Mn 4+ ,0.01NaF]

[0039] Take 7.7 mL HF solution (mass concentration 40%), 4.40g KF·2H 2 O, 0.4942 g (2 mmol) K 2 MnF 6 The powder was placed in a 50 mL plastic beaker, and stirred with a magnetic stirrer at room temperature and pressure until the solid raw materials were completely dissolved to obtain a golden yellow transparent solution. Then 11.01 g (50.0 mmol) K 2 SiF 6 The powder was added to the above solution (K 2 MnF 6 / K 2 SiF 6 molar ratio, x =0.04), stirred and reacted at normal temperature and pressure for 120 min, filtered under reduced pressure, and then added dropwise 0.50 mL of 1 mol / L NaNO to the above reaction mixture under stirring 3 The solution was stirred for 10 min, filtered under reduced pressure, and washed 3 times with a small amount of absolute ethanol. Dry the filter cake at 80 °C for 3 h, grind the dried filter cake into powder, and the obtained orange powder is the final product K 2 Si...

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Abstract

The invention provides fluoride red fluorescent powder for a blue-ray excited white-light LED and preparation and modification methods thereof. A general formula A2MF6: xMn<4+>, yBF is adopted to represent the material composition of the fluoride red fluorescent powder, wherein A and B independently represent Na or K respectively and are different, M is Ti or Si, x is equal to mMn / mM, x is greaterthan and or equal to 0 and smaller than or equal to 0.1, y is equal to mBF / mM, and y is greater than and or equal to 0 and smaller than or equal to 0.1. According to the preparation method of the fluoride red fluorescent powder for the blue-ray excited white-light LED, industrial and commercial raw materials are adopted, the process is simple, preparation is carried out at normal pressure and temperature, and therefore the preparation method of the fluoride red fluorescent powder for the blue-ray excited white-light LED is suitable for large-scale industrial production.

Description

technical field [0001] The invention belongs to the field of preparation of inorganic functional materials, and relates to a fluoride red fluorescent powder for blue light excitation white light LED and an industrial normal temperature preparation method thereof. Background technique [0002] Diodes (white LEDs) have the advantages of high luminous efficiency, energy saving, long life, low energy consumption, and environmental protection. Therefore, LEDs are regarded as a new generation of solid-state light-emitting devices. At present, the most mature and commercialized white LEDs are based on blue chip and yellow phosphor YAG:Ce 3+ Realized by the combination of yellow phosphor YAG:Ce 3+ Absorption of the blue light emitted by the blue chip produces yellow fluorescence, which is combined with the chip's blue light to obtain white light. Because this kind of white light lacks red light components, it has disadvantages such as high color temperature and low color purity, ...

Claims

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Application Information

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IPC IPC(8): C09K11/67H01L33/56H01L33/50
CPCC09K11/675H01L33/502H01L33/56
Inventor 廖森黄映恒王银龙陈治勇李燕何灿
Owner 广西经正科技开发有限责任公司
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