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A kind of tetravalent manganese ion-doped barium fluoroscandate red light material and preparation method thereof

A barium fluoroscandate and ion doping technology, which is applied in the direction of luminescent materials, preparation/processing of rare earth metal compounds, chemical instruments and methods, etc., can solve the problem of energy-consuming synthesis equipment, which has high requirements and is unfavorable for large-scale industrial production and other issues, to achieve the effect of low cost, simple ingredients, and significant production advantages

Active Publication Date: 2020-09-01
WENZHOU UNIV
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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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  • A kind of tetravalent manganese ion-doped barium fluoroscandate red light material and preparation method thereof
  • A kind of tetravalent manganese ion-doped barium fluoroscandate red light material and preparation method thereof
  • A kind of tetravalent manganese ion-doped barium fluoroscandate 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 fluoroscandate red light material and a preparation method thereof. The material is Ba 3 sc 2 f 12 as matrix, with Mn 4+ As an activator, the chemical composition is Ba 3 sc 2 f 12 :Mn 4+ . The preparation method is as follows: with Sc 2 o 3 Scandium source, Ba(NO 3 ) 2 as barium source, with K 2 MnF 6 In order to activate ion manganese source, HF aqueous solution is used as medium and fluorinating agent. During preparation, the Sc 2 o 3 The solid was placed in a container, and then HF aqueous solution, Ba(NO 3 ) 2 and K 2 MnF 6 , react at room temperature to 180 degrees for 1 to 12 hours, filter with suction, and dry naturally to obtain the product. The material may be applied to dichroic white LEDs to improve the color rendering index of white LEDs. The product does not contain rare earth, has a simple preparation method, does not need 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 Patents(China)
IPC IPC(8): C01F17/10C01F17/36C09K11/77
CPCC01F17/36C01P2002/72C01P2004/03C01P2004/61C09K11/7705
Inventor 潘跃晓董新龙杨翱杰蒋梦千李轶倩
Owner WENZHOU UNIV
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