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Bismuth/europium-ion-codoped zirconate fluorescent material and preparation method thereof
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A fluorescent material, europium ion technology, applied in the field of ceramic phosphors, can solve the problems of low color rendering, complexity, and narrow visible light emission color gamut, and achieve the effect of wide emission color gamut and high-efficiency response characteristics
Inactive Publication Date: 2014-12-31
KUNMING UNIV OF SCI & TECH
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[0003] The purpose of the present invention is to solve the problems of the existing LED lighting phosphors, such as narrow visible light luminous color gamut, low color rendering, the need for compounding of various phosphors, high cost and complicated preparation methods, etc., using Bi and Eu ions as active ions to prepare Bismuth, europium ion co-doped zirconate white phosphor material with high-efficiency response to ultraviolet light excitation
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Embodiment 1
[0014] (1) According to the molar ratio of Ba:Zr:Eu:Bi=1:1:0.025:0.05, weigh BaCO 3 , ZrO 2 、 Bi 2 o 3 and Eu 2 o 3 , and mix evenly;
[0015] (2) Put the mixture obtained in step (1) in a corundum crucible, pre-calcined in the air at 1300°C for 3 hours, after natural cooling, in a reducing atmosphere H 2 +N 2 Calcined at 1300°C for 3 hours, and after grinding, the zirconate fluorescent material BaZrO co-doped with bismuth and europium ions was obtained. 3 : 0.025Eu: 0.05Bi.
Embodiment 2
[0017] (1) According to the molar ratio of Mg: Zr: Eu: Bi = 1: 1: 0.01: 0.01, weigh MgCO 3 , ZrO 2 、 Bi 2 o 3 and Eu 2 o 3 , and mix evenly, wherein, M is any one of Mg, Ca, Sr, Ba;
[0018] (2) Put the mixture obtained in step (1) in a corundum crucible, pre-calcined in the air at 1300 ° C for 4 hours, after natural cooling, in a reducing atmosphere H 2 +N 2 Calcined at 1200°C for 5h, and after grinding, the zirconate fluorescent material MgZrO co-doped with bismuth and europium ions was obtained. 3 : 0.01Eu: 0.01Bi.
Embodiment 3
[0020] (1) According to the molar ratio of Ca: Zr: Eu: Bi = 1: 1: 0.03: 0.08, weigh CaCO 3 , ZrO 2 、 Bi 2 o 3 and Eu 2 o 3 , and mix evenly;
[0021] (2) Put the mixture obtained in step (1) in a corundum crucible, pre-calcined in air at 1300°C for 1 hour, after natural cooling, in a reducing atmosphere H 2 +N 2 Calcined at 1000°C for 1h, and after grinding, a zirconate fluorescent material CaZrO co-doped with bismuth and europium ions was obtained. 3 : 0.03Eu: 0.08Bi.
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Abstract
The invention provides a bismuth / europium-ion-codoped zirconate fluorescent material and a preparation method thereof. The MZrO3:Eu:Bi mol ratio in the material is 1:(0.01-0.1):(0.01-0.1), wherein M is any one of Mg, Ca, Sr and Ba. The preparation method comprises the following steps: weighing MCO3, ZrO2, Bi2O3 and Eu2O3 according to the M:Zr:Eu:Bi mol ratio of 1:1:(0.01-0.1):(0.01-0.1), evenly mixing, precalcining the mixture in the air at 1300 DEG C for 1-4 hours, naturally cooling, calcining at 1000-1300 DEG C in a reducing atmosphere for 1-5 hours, and grinding to obtain the bismuth / europium-ion-codoped zirconate fluorescent material. The fluorescent powder has 470nm wideband emission peak from Bi<3+> and red feature emission of Eu<3+> under the excitation of 340nm ultraviolet light; and the fluorescent powder has wide light-emitting color range under the excitation of ultraviolet light, does not need multiple fluorescent powder ratios, and can not have the problem of color temperature drift.
Description
technical field [0001] The invention belongs to the technical field of display and illumination phosphors, and in particular relates to a ceramic phosphor with display and illumination functions under the excitation of ultraviolet light. Background technique [0002] White LED is a new type of solid-state lighting energy. It is considered to be a new energy that may replace traditional lighting sources in the 21st century due to its advantages of energy saving, long service life, low energy consumption, no pollution, and high efficiency. At present, there are two main ways to obtain white light LEDs: one is the multi-chip combination type, which combines LEDs that emit red, green, and blue light respectively, and mixes the three kinds of light to form white light emission. The white light of this scheme has the advantages of high brightness, good stability and color rendering; however, the cost is high, the driving circuit is complicated, and there is no large-scale producti...
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