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Tetravalent manganese ion-doped barium fluoscandate red light material and preparation method thereof

A barium fluoroscandate and ion doping technology is applied in the directions of luminescent materials, chemical instruments and methods, rare earth metal compounds, etc., and can solve the problems of unfavorable large-scale industrial production, energy-consuming synthesis equipment, high requirements, etc. Significant production advantages, low cost, simple ingredients

Active Publication Date: 2019-01-11
WENZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the preparation of this kind of red light material needs to use more expensive metal elements (such as titanium, germanium, silicon, etc.) High requirements, not conducive to large-scale industrial production

Method used

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  • Tetravalent manganese ion-doped barium fluoscandate red light material and preparation method thereof
  • Tetravalent manganese ion-doped barium fluoscandate red light material and preparation method thereof
  • Tetravalent manganese ion-doped barium fluoscandate red light material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Accurately weigh 0.1382g Sc 2 The O solid is placed in a plastic container, and 30ml of HF aqueous solution with a mass concentration of 40%, and 0.5260g of Ba(NO 3 ) 2 and K 2 MnF 6 solid, K in the reaction system 2 MnF 6 The molar concentration is 0.5% (relative to Sc 3+ ). After magnetic stirring at room temperature for 5 hours, suction filtration, washing with water, and natural drying to obtain light yellow crystal powder. The product glows red under a UV light. Use the Bruker D8Advance X-ray diffractometer to detect the XRD of the product, such as figure 1 As shown, XRD shows that the product product is pure Ba 3 sc 2 f 12 Mutually. After testing, the product obtained in this embodiment is light yellow crystal under natural light, and bright red light is found under ultraviolet light. Using a Fluoromax-4 fluorescence spectrometer (HORIBA Jobin Yvon Inc.), the luminescent properties of the product were detected at room temperature, such as figure 2 A...

Embodiment 2

[0026] Accurately weigh 0.1382g Sc 2 O solid is placed in the liner of polytetrafluoroethylene reaction kettle, add 30ml mass concentration successively and be the HF aqueous solution of 5%, and 0.5260g Ba(NO 3 ) 2 and K 2 MnF 6 solid, K in the reaction system 2 MnF 6 The molar concentration is 0.01% (relative to Sc 3+ ). After magnetically stirring evenly, put it into a reaction kettle, heat it at 100°C for 1 hour, take it out, cool it, filter it with suction, wash it with water, and dry it naturally to obtain a light yellow crystal powder. The product glows red under a UV light. The XRD pattern, fluorescence spectrum and SEM pattern of this light yellow crystal powder material are consistent with Figure 1~3 basically the same.

Embodiment 3

[0028] Accurately weigh 0.1382g Sc 2 O solid is placed in the liner of polytetrafluoroethylene reaction kettle, add 30ml mass concentration successively and be the HF aqueous solution of 15%, and 0.5260g Ba(NO 3 ) 2 and K 2 MnF 6 solid, K in the reaction system 2 MnF 6 The molar concentration is 1% (relative to Sc 3+ ). After magnetically stirring evenly, put it into a reaction kettle, heat it at 120°C for 12 hours, take it out, cool it, filter it with suction, wash it with water, and dry it naturally to obtain a light yellow crystal powder. The product emits weak red light under ultraviolet light. The XRD pattern, fluorescence spectrum and SEM pattern of this light yellow crystal powder material are consistent with Figure 1~3 basically the same.

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Abstract

The invention discloses a tetravalent manganese ion-doped barium fluoscandate red light material and a preparation method thereof. The material is based on Ba3Sc2F12, contains Mn<4+> as an activator and has a chemical composition of Ba3Sc2F12: Mn<4+>. The preparation method utilizes Sc2O3 as a scandium source, Ba(NO3)2 as a barium source, K2MnF6 as an activated ion manganese source and a HF aqueous solution as a medium and a fluorinating agent, and comprises: putting Sc2O3 solids into a container, adding the HF aqueous solution, Ba(NO3)2 and K2MnF6 into the container, carrying out a reaction process in a range of the normal temperature to 180 DEG C for 1-12h, carrying out suction filtration and carrying out natural airing to obtain the tetravalent manganese ion-doped barium fluoscandate red light material. The product has the maximum excitation wavelength in a 467nm blue region, can be effectively excited by the GaN blue chip, can emit a red quaternary manganese characteristic emissionpeak and has an emission spectrum in 600-650nm. The tetravalent manganese ion-doped barium fluoscandate red light material can supply a red light component absent by white LED, can be used for two-primary color white LED, can improve the white LED color rendering index and does not contain rare earth. The preparation method is simple, is free of high temperature sintering and is suitable for industrial production.

Description

technical field [0001] The present invention relates to luminescent materials, in particular to a red light material that can be used for white light LEDs; in particular, it relates to a barium fluoroscandate doped with tetravalent manganese ions whose excitation wavelength is in the blue light region and emission wavelength is in the red light region. Materials and their preparation methods. Background technique [0002] Compared with traditional light sources, semiconductor white light LEDs are increasingly favored by people because of their excellent characteristics, such as energy saving, light adjustment, vibration resistance, not easy to damage, instant start, no flicker frequency, and long service life. The leading white LED product in the market is a yellow-blue two-color white LED packaged by yellow phosphor YAG:Ce and blue LED. In this LED structure, the electro-induced blue light (450-470nm) of the GaN chip excites the phosphor YAG: Ce produces 550nm yellow light...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00C09K11/77
CPCC01F17/36C01P2002/72C01P2004/03C01P2004/61C09K11/7705
Inventor 潘跃晓董新龙杨翱杰蒋梦千李轶倩
Owner WENZHOU UNIVERSITY
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