Bivalent bismuth ion-doped chloro-barium pentaborate red fluorescent material and preparation method thereof

A kind of barium chloropentaborate, red fluorescence technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., to achieve the effect of improving the color rendering index

Active Publication Date: 2012-02-08
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In addition, most of these studies have focused on the doping of rare earth ions or

Method used

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  • Bivalent bismuth ion-doped chloro-barium pentaborate red fluorescent material and preparation method thereof
  • Bivalent bismuth ion-doped chloro-barium pentaborate red fluorescent material and preparation method thereof
  • Bivalent bismuth ion-doped chloro-barium pentaborate red fluorescent material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0020] Choose barium carbonate, boric acid, barium chloride and bismuth trioxide as starting materials, press Ba 2(1-x) B 5 o 9 Cl: 2xBi (x=0.05) shows the molar ratio, namely Ba: B: Cl: Bi = 1.90: 5: 1: 0.10, four kinds of raw materials are weighed respectively, and the total weight of the control mixture is 50 grams. After 50 grams of the mixture were mixed by ball milling, they were put into a corundum crucible, and then the crucible was put into a high-temperature electric furnace. Control the heating rate, control the decomposition rate of boron compounds, and prevent the mixture from overflowing from the crucible. The sample is at 500 o C pre-fired for 10 hours. Take out the pre-fired sample, grind and mix it again, put it into a crucible, and put it into a crucible at 1000 o C, fired twice for 10 hours, and ground again in the middle. The fired samples were placed in 1000 o CH 2 The bivalent bismuth-doped red fluorescent material was prepared after being treated ...

Embodiment 2

[0022] Choose barium hydroxide, diboron trioxide, ammonium chloride and bismuth trioxide as starting raw materials, press Ba 2(1-x) B 5 o 9 The molar ratio shown by Cl:2xBi (x = 0.0001), namely Ba: B: Cl: Bi = 1.9998: 5: 1: 0.0002, respectively weighed the four raw materials, and controlled the total weight of the mixture to be 50 grams. After 50 grams of the mixture were mixed by ball milling, they were put into a corundum crucible, and then the crucible was put into a high-temperature electric furnace. Control the heating rate, control the decomposition rate of boron compounds, and prevent the mixture from overflowing from the crucible. The sample is at 400 o C pre-fired for 10 hours. The pre-fired sample is taken out, ground and mixed again, put into a crucible, and heated at 800 o C, fired twice for 10 hours, and ground again in the middle. The fired samples were placed at 800 o C N 2 +H 2 The bivalent bismuth-doped red fluorescent material was prepared after being...

Embodiment 3

[0024] Choose barium oxide, metaboric acid, barium chloride containing crystal water and bismuth powder as starting materials, press Ba 2(1-x) B 5 o 9 Cl:2xBi (x = 0.10) shows the molar ratio, namely Ba: B: Cl: Bi = 1.80: 5: 1: 0.20, respectively weigh four kinds of raw materials, and control the total weight of the mixture to be 50 grams. After 50 grams of the mixture were mixed by ball milling, they were put into a corundum crucible, and then the crucible was put into a high-temperature electric furnace. Control the heating rate, control the decomposition rate of boron compounds, and prevent the mixture from overflowing from the crucible. The sample is at 750 o C pre-fired for 5 hours. The pre-fired sample is taken out, ground and mixed again, put into a crucible, and heated at 900 o C, fired twice for 5 hours, and ground again in the middle. The fired samples were placed at 900 o C N 2 +H 2 The bivalent bismuth-doped red fluorescent material was prepared after being...

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Abstract

The invention provides a preparation method of a bivalent bismuth ion-doped chloro-barium pentaborate red fluorescent material, which comprises the following steps of: weighing a compound raw material containing barium, boracium, chlorine and bismuth according to mol ratio of barium to boracium to chlorine to bismuth being 2(1-x):5:1:2x, wherein x is more than or equal to 0.0001 and less than or equal to 0.10; uniformly grinding the raw materials and pre-sintering; controlling the temperature to be 400-750oC; taking out the pre-sintered sample; uniformly regrinding and sintering at high temperature; and controlling the temperature to be 800-1000oC; feeding the sintered sample in a reducing atmosphere with 800-1000oC and reacting for 15 minutes to 10 hours to obtain the required red fluorescent material. The fluorescent material prepared by the invention can be absorbed by ultraviolet and blue light spectrum regions and is excited by ultraviolet light or blue light to form red fluorescent light covering an interval of 600-750nm; and the fluorescent life of the fluorescent material is about 10 microseconds.

Description

technical field [0001] The invention relates to the field of luminescent material research, in particular to a divalent bismuth ion-doped barium chloropentaborate red fluorescent material and a preparation method thereof. Background technique [0002] Solid-state LED lighting technology has the advantages of low energy consumption, high luminous efficiency, long service life, mercury-free, small size, and unbreakable, so it is gradually widely used in general lighting, automobiles, transportation, imaging, agriculture, medicine and other fields. According to research from the University of California, Santa Barbara, if traditional light bulbs are replaced with 150 lumens per watt of white LEDs (WLEDs), the United States alone can save $115 billion in lighting by 2025, thus saving 133 buildings. Power station, less emission of greenhouse CO 2 258 million tons of gas. In view of this, research on LEDs, especially WLEDs, is in the ascendant recently. Among all the schemes ba...

Claims

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Application Information

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IPC IPC(8): C09K11/63
Inventor 彭明营邱建荣董国平杨中民张勤远
Owner SOUTH CHINA UNIV OF TECH
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