A kind of preparation method of boron nitride phosphor material

A phosphor and oxide technology, applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of high price, harsh environment, unsuitable for large-scale industrial production, etc., and achieve low cost, short production cycle, and cheap raw materials Effect

Active Publication Date: 2019-01-25
HUZHOU TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Most of the raw materials used in the preparation process of this method are expensive nitrides, and the synthetic environment is relatively harsh (water and oxygen) so it is not suitable for industrial large-scale production

Method used

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  • A kind of preparation method of boron nitride phosphor material
  • A kind of preparation method of boron nitride phosphor material
  • A kind of preparation method of boron nitride phosphor material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Example 1, LiSr 4 (BN 2 ) 3 : Preparation of Cel mol%

[0048] Weigh 0.185g Li according to the stoichiometric ratio 2 CO 3 , 4.190g Sr(NO 3 ) 2 , 0.927g HBO 3 , 0.035gCeO 2 . Put the weighed raw materials into the agate mortar, add acetone and keep grinding until the acetone is completely evaporated, and all the raw materials are mixed evenly. The mixture was then put into a corundum crucible and sintered at 650°C for 3 hours under charcoal heat. The obtained sintered material was re-ground evenly, then put into a corundum crucible, and sintered at 800°C for 3 hours under charcoal heating conditions, and LiSr was obtained after grinding. 4 (BN 2 ) 3 : Cel mol% phosphor. XRD powder diffraction shows that the obtained is pure LiSr 4 (BN 2 ) 3 structure( figure 1 ).

Embodiment 2

[0049] Example 2, LiSr 4 (BN 2 ) 3 : Preparation of Ce2mol%

[0050] Weigh 0.185g Li according to the stoichiometric ratio 2 CO 3 , 4.146g Sr(NO 3 ) 2 , 0.927g HBO 3 , 0.069gCeO 2 . Put the weighed raw materials into the agate mortar, add acetone and keep grinding until the acetone is completely evaporated, and all the raw materials are mixed evenly. The mixture was then put into a corundum crucible and sintered at 650°C for 3 hours under charcoal heat. The obtained sintered material was re-ground evenly, then put into a corundum crucible, and sintered at 800°C for 3 hours under charcoal heating conditions, and LiSr was obtained after grinding. 4 (BN 2 ) 3 : Ce2mol% phosphor. Measure the excitation and emission spectra of phosphors with a fluorescence spectrometer, such as figure 2 shown. Under the excitation of near-ultraviolet light, the phosphor exhibits strong blue light emission.

Embodiment 3

[0051] Example 3, LiSr 4 (BN 2 ) 3 : Preparation of Ce 0.5mol%, Tb2mol%

[0052] Weigh 0.185g Li according to the stoichiometric ratio 2 CO 3 , 4.169g Sr(NO 3 ) 2 , 0.927g HBO 3 , 0.017gCeO 2 , 0.083g Tb(NO 3 ) 3 4(H 2 O). Put the weighed raw materials into the agate mortar, add acetone and keep grinding until the acetone is completely evaporated, and all the raw materials are mixed evenly. The mixture was then put into a corundum crucible and sintered at 650°C for 3 hours under charcoal heat. The obtained sintered material was re-ground evenly, then put into a corundum crucible, and sintered at 800°C for 3 hours under charcoal heating conditions, and LiSr was obtained after grinding. 4 (BN 2 ) 3 : Ce2mol% phosphor. Measure the excitation and emission spectra of phosphors with a fluorescence spectrometer, such as figure 2 shown. Under the excitation of near-ultraviolet light, the phosphor exhibits strong blue light emission.

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Abstract

The invention relates to a preparation method of a nitride-boride fluorescent powder material. The preparation method is characterized in that common metal salt or oxide is used as the raw material, a high-temperature solid-phase method is used for preparation, the preparation process of nitride fluorescent powder is simplified, and production cost is lowered. The expression of the nitride-boride fluorescent powder material is AM4-4x(BN2):xD, wherein A is one or more of Li, Na, K, Rb and Cs; M is one or more of Mg, Ca, Sr and Ba, and D is one or more of Mn<2+>, Ce<3+>, Pr<3+>, Nd<3+>, Pm<3+>, Sm<3+>, Sm<2+>, Eu<3+>, Eu<2+>, Tb<3+>, Dy<3+>, Ho<3+>, Er<3+>, Tm<3+>, Yb<3+> and Yb<2+>. The preparation method specifically includes: weighing the raw materials of A, M and D and boric acid according to stoichiometric ratio, adding appropriate amount of acetone into the raw materials, and sufficiently grinding to obtain a mixture; performing heat preservation on the mixture for 1-5 hours in an environment of 400-650 DEG C and under reduction atmosphere; grinding and evenly mixing obtained preliminary-combustion substance, and performing heat preservation on the mixture for 1-8 hours in an environment of 700-900 DEG C to obtain the nitride-boride fluorescent powder material. The preparation method has the advantages that the method using a solid-phase synthesizing method is low in synthesizing temperature, simple in preparation process, low in cost, safe, reliable, short in production cycle and suitable for large-scale industrial production, and the prepared fluorescent powder is excellent in light-emitting efficiency.

Description

technical field [0001] The invention relates to a class of rare earth or Mn used in the field of light emission 2+ The preparation method of ion-activated boride nitride phosphor material. Background technique [0002] Semiconductor lighting or light-emitting diode (LED), because of its remarkable advantages such as high efficiency, energy saving, environmental protection, long life, and high luminous efficiency, is regarded as the fourth-generation lighting source, and has received widespread attention and accelerated research and development from all over the world. At present, the most commonly used method to realize white LED is to combine blue LED chips with yellow and red phosphors (such as YAG: Ce, CaAlSiN 3 : Eu 2+ ) or combine near-ultraviolet LED chips with red, green, and blue phosphors to achieve white light emission by adjusting the light output in different bands. Therefore, the development of tricolor phosphors suitable for blue light and near-ultraviolet l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/63
CPCC09K11/7715C09K11/7766
Inventor 罗文钦巫海燕李彬王永亚
Owner HUZHOU TEACHERS COLLEGE
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