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Near-infrared-luminescence bismuth-doped barium chloropentaborate crystal and preparation method thereof

A technology of barium chloropentaborate and crystal, which is applied in the field of bismuth-doped barium chloropentaborate crystal and its preparation with near-infrared light emission, and can solve the problems of insufficient fluorescence bandwidth and the like

Active Publication Date: 2014-07-16
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to overcome the insufficient fluorescence bandwidth of existing rare earth doped materials, the object of the present invention is to provide a bismuth-doped barium chloride pentaborate crystal with near-infrared ultra-broadband luminescence characteristics

Method used

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  • Near-infrared-luminescence bismuth-doped barium chloropentaborate crystal and preparation method thereof
  • Near-infrared-luminescence bismuth-doped barium chloropentaborate crystal and preparation method thereof
  • Near-infrared-luminescence bismuth-doped barium chloropentaborate crystal and preparation method thereof

Examples

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Effect test

Embodiment 1

[0032] Example 1—Preparation of bismuth-doped barium chlorinated pentaborate crystals by high-temperature solid-state method

[0033] Choose barium carbonate, boric acid, barium chloride and bismuth trioxide as starting materials, press Ba 2(1-x) B 5 o 9The molar ratio indicated by Cl:2xBi (x=0.05), that is, Ba:B:Cl:Bi=1.90:5:1:0.10, weighed four kinds of raw materials respectively, and controlled the total weight of the mixture to be 50 grams. After mixing, the mixture is put into a corundum crucible, and then the crucible is put into a high-temperature electric furnace. Control the heating rate to 0.83C / min, control the decomposition rate of boric acid, prevent the mixture from overflowing from the crucible, and pre-fire the sample at 500C for 10 hours. Take out the pre-fired sample, grind and mix it again, put it into a crucible, burn it at 1000C for 10 hours twice, and grind it again in the middle. The fired sample was placed at 1000C, H 2 After 15 minutes of treatmen...

Embodiment 2

[0039] Example 2—Preparation of bismuth-doped barium chloropentaborate crystals by high-temperature solid-state method

[0040] 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), that is, Ba:B:Cl:Bi=1.9998:5:1:0.0002, weighed four kinds of raw materials respectively, and controlled the total weight of the mixture to be 50 grams. After the mixture is mixed, put it into a corundum crucible, and then put the crucible into a high-temperature electric furnace. Control the heating rate to 3C / min, control the decomposition rate of diboron trioxide and ammonium chloride to prevent the mixture from overflowing from the crucible, and pre-fire the sample at 400oC for 10 hours. Take out the pre-fired sample, grind and mix it again, put it into a crucible, burn it at 800oC for 10 hours twice, and grind it again in the middle. The fired sample is placed at 800oC,...

Embodiment 3

[0041] Example 3—Preparation of bismuth-doped barium chlorinated pentaborate crystals by high-temperature solid-state method

[0042] Choose barium oxide, metaboric acid, barium chloride and bismuth powder as starting materials, press Ba 2(1-x) B 5 o 9 The molar ratio indicated by Cl:2xBi (x=0.10), namely Ba:B:Cl:Bi=1.80:5:1:0.20, weighed four kinds of raw materials respectively, and controlled the total weight of the mixture to be 50 grams. After the mixture is mixed, put it into a corundum crucible, and then put the crucible into a high-temperature electric furnace. Control the heating rate to 0.4C / min, control the metaboric acid decomposition rate, prevent the mixture from overflowing from the crucible, and pre-fire the sample at 750C for 5 hours. Take out the pre-fired sample, grind and mix it again, put it into a crucible, burn it at 900C for 5 hours twice, and grind it again in the middle. The fired sample is placed in 900CN 2 +H 2 Treated in the atmosphere for 30 ...

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Abstract

The invention discloses a bismuth-doped barium chlorinated pentaborate crystal emitting near-infrared light and a preparation method thereof. The chemical formula of bismuth-doped barium chloropentaborate crystal is Ba2(1-x)B5O9Cl:2xBi, 0.0001≤x≤0.10. The invention also discloses methods for preparing bismuth-doped barium chlorinated pentaborate crystals by adopting a high-temperature solid phase method and a melt method respectively. The high-temperature solid-phase method is to grind and mix the compound raw materials containing barium, boron, chlorine and bismuth, pre-calcine, grind and mix, and then fire at high temperature, and react the fired materials in a reducing atmosphere at 800-1000oC; Compared with the existing rare earth doped materials, the Ba2B5O9Cl:Bi crystal prepared by the present invention has absorption covering the ultraviolet, visible and near-infrared spectral regions, has a broadband near-infrared emission of 800-1500nm, and has a fluorescence half-maximum width greater than 200nm. longer than 30 microseconds.

Description

technical field [0001] The invention relates to the field of luminescent material research, in particular to a near-infrared luminescent bismuth-doped barium chlorinated pentaborate crystal and a preparation method thereof. Background technique [0002] Near-infrared laser light sources have extremely important applications in military, medical, optical communication, material processing, precision measurement, astronomical observation, environmental monitoring and other fields. For example, ytterbium ions can emit broadband fluorescence near 1 micron, and ytterbium ions are introduced into glass optical fibers. Using its high gain, a fiber laser output of 50 kilowatts with a wavelength of ~1030nm can be obtained at present. Ytterbium fiber laser is used in metal cutting and welding. etc. have been shown to replace CO 2 The trend of laser, fiber laser has developed rapidly in recent years. For example, erbium-doped fiber amplifiers and lasers are essential optical devices ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/63C30B29/22C30B1/10C30B11/00
Inventor 彭明营郑嘉裕邱建荣董国平马志军
Owner SOUTH CHINA UNIV OF TECH
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