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Bismuth-ion-doped halogen phosphate fluorescent material and preparation method thereof

A technology of halophosphate and fluorescent material, applied in the field of fluorescent powder material and preparation thereof, can solve the problems of high cost, complexity, narrow color gamut and the like of the preparation method, and achieves a simple preparation method, low cost and wide emission color gamut Effect

Inactive Publication Date: 2014-07-02
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the problems of the narrow color gamut of existing lighting phosphor materials, the need for compounding of various phosphors, and the high cost and complexity of the preparation method, the present invention aims at using Bi ions as active ions to prepare Bi ion-doped haloapatite. Illumination phosphor, which has high-efficiency response characteristics to ultraviolet light excitation, is achieved through the following technical solutions

Method used

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  • Bismuth-ion-doped halogen phosphate fluorescent material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0014] (1) According to Mg ion + Ca ion: Bi ion: PO 4 Ion: molar ratio of F ion + Cl ion = 1.999: 0.001: 1.0: 0.6, weigh MgO, CaCO 3 , CaHPO 4 , CaF 2 , CaCl 2 , NH 4 Cl and Bi 2 o 3 , and mix evenly, where the molar ratio of Mg ions: Ca ions=1.0:0.999, F ions: Cl ions=0.2:0.6;

[0015] (2) Raise the temperature of the mixture obtained in step (1) to 200°C, keep it warm for 4 hours, and then introduce reducing atmosphere H 2 +N 2 , and then heated up to 1300°C, kept warm for 4 hours, then cooled to room temperature with the furnace, and finally ground to get the chemical composition formula Mg 1.0 Ca 0.999 Bi 0.001 (PO 4 ) 1.0 f 0.2 Cl 0.4 Bismuth ion-doped halophosphate fluorescent materials.

Embodiment 2

[0017] (1) According to Ba ion: Bi ion: PO 4 The molar ratio of ions:Cl ions=1.98:0.02:1.2:0.4, weigh BaCO 3 、BaHPO 4 , (NH 4 ) 2 HPO 4 , BaCl 2 、 Bi 2 o 3 , and mix well;

[0018] (2) Raise the temperature of the mixture obtained in step (1) to 400°C, keep it warm for 1.5 hours, and then introduce reducing atmosphere H 2 +N 2 , and then heated up to 1200°C, kept warm for 3 hours, then cooled to room temperature with the furnace, and finally ground to get the chemical composition formula Ba 1.98 Bi 0.02 (PO 4 ) 1.2 Cl 0.4 Bismuth ion-doped halophosphate fluorescent materials.

Embodiment 3

[0020] (1) According to Ba ion: Bi ion: PO 4 Ion: Br ion + Cl ion molar ratio = 1.6: 0.4: 1.6: 0.4, weigh BaCO 3 、BaHPO 4 、 Bi 2 o 3 、BaBr 2 , NH 4 Br, and mix well, where the molar ratio of Br ions:Cl ions=1:1;

[0021] (2) Raise the temperature of the mixture obtained in step (1) to 500°C, keep it warm for 0.5 hours, then introduce reducing atmosphere CO, then raise the temperature to 1100°C, keep it warm for 2 hours, cool it to room temperature with the furnace, and finally grind it to get the chemical composition formula for Ba 1.6 Bi 0.4 (PO 4 ) 1.6 Br 0.2 Cl 0.2 Bismuth ion-doped halophosphate fluorescent materials.

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Abstract

The invention provides a halophosphate fluorescent material doped with bismuth ions and a preparation method thereof. The halophosphate fluorescent material is composed of components whose chemical composition formula is A2-xBix(PO4)yMz; by weighing a certain amount of AM2 and Bi2O3; AO and / or ACO3; and NH4M, AHPO4 and / or NH4H2PO4, wherein A is Mg, Ca, Sr and / or Ba; M is F, Cl and / or Br; after mixing evenly, the mixture is heated up, keep warm, then put in a reducing atmosphere or put carbon powder in, then heat up, keep warm and cool to room temperature with the furnace, and finally grind to get a bismuth ion-doped halophosphate phosphor with the chemical composition formula A2-xBix(PO4)yMz . The phosphor material has high-efficiency response characteristics to ultraviolet light, the luminescence almost covers the entire visible light band, and the visible light luminescence color gamut is wide, and yellow-white broadband luminescence can be realized without multiple phosphor powder ratios and multiple ion doping, and the preparation method Simple and low cost.

Description

technical field [0001] The invention relates to a halophosphate fluorescent material doped with bismuth ions and a preparation method thereof, in particular to a fluorescent powder material with a display lighting function under the excitation of ultraviolet light and a preparation method thereof, which belongs to the lighting and display fluorescent powder technology field. Background technique [0002] Since it is difficult for a single-doped fluorescent material to achieve high-efficiency full-white light emission under ultraviolet excitation, multi-ion co-doping or mixing of phosphors of various colors is often used to obtain full-spectrum emission of visible light, thereby obtaining white light. For example, in the original halophosphate phosphor, often through Sb 3+ -Mn 2+ , Eu 2+ -Mn 2+ White light emission can be achieved by co-doping with various ions; or white light emission can be obtained by red, blue and green phosphors. For example, in near-ultraviolet exc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/73
Inventor 宋志国李臣邱建备杨正文周大成尹兆益杨勇赵宗彦余雪
Owner KUNMING UNIV OF SCI & TECH
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