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A kind of boroaluminate ultraviolet fluorescent material and its preparation method and application

A technology of boroaluminate and fluorescent materials, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., and can solve the problems of display color distortion, luminous instability, drift, etc.

Active Publication Date: 2022-05-24
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above method belongs to charge equivalent substitution, and when used in air, when the temperature rises, Eu 2+ May convert to Eu 3+ , so that the color purity of the light is weakened, the luminescence is unstable, and even drifts, which will lead to color distortion on the display screen after a long time

Method used

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  • A kind of boroaluminate ultraviolet fluorescent material and its preparation method and application
  • A kind of boroaluminate ultraviolet fluorescent material and its preparation method and application
  • A kind of boroaluminate ultraviolet fluorescent material and its preparation method and application

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preparation example Construction

[0027] The present invention provides a method for preparing the rare earth boro-aluminate ultraviolet fluorescent material according to the above technical solution, comprising the following steps:

[0028] 1) According to the stoichiometric ratio of each element in the rare earth boro-aluminate ultraviolet fluorescent material, the lithium source, the aluminum source, the boron source, the europium source and the M source are mixed to obtain a mixture; M in the M source is an element one or more of calcium, magnesium, strontium and barium;

[0029] 2) calcining the mixture obtained in the step 1) in a reducing atmosphere to obtain a rare earth boro-aluminate fluorescent material.

[0030] According to the stoichiometric ratio of each element in the rare earth boro-aluminate ultraviolet fluorescent material, the present invention mixes lithium source, aluminum source, boron source, europium source and M source to obtain a mixture; M in the M source is an element One or more ...

Embodiment 1

[0035] Example 1 Preparation of Li 6.99 CaAlB 12 O 24 :0.01Eu 2+ phosphor

[0036] Calculate the raw material lithium carbonate Li according to the chemical formula 2 CO 3 , calcium carbonate CaCO 3 , Alumina Al 2 O 3 , boric acid H 3 BO 3 and Europium oxide Eu 2 O 3 quality, as shown in Table 1.

[0037] Table 1 Preparation of Li 6.99 CaAlB 12 O 24 :0.01Eu 2 Raw materials for phosphors

[0038]

[0039] Accurately weigh the above analytically pure raw materials, fully grind them evenly in an agate crucible, and obtain a mixture;

[0040] Put the mixture into a ceramic crucible, put the ceramic crucible containing the mixture into a tube furnace, pass nitrogen-hydrogen mixed gas (the volume percentage of hydrogen is 5%), and follow the procedure set below For calcination, the set temperature program is as follows: at a heating rate of 8°C / min, the temperature is raised from room temperature (25°C) to 350°C, kept for 2 hours, and then heated to 750°C at a h...

Embodiment 2

[0041] Example 2 Preparation of Li 6.96 CaAlB 12 O 24 :0.04Eu 2+ phosphor

[0042] Calculate the raw material lithium carbonate Li according to the chemical formula 2 CO 3 , calcium carbonate CaCO 3 , Alumina Al 2 O 3 , boric acid H 3 BO 3 and Europium oxide Eu 2 O 3 The quality of , as shown in Table 2; other operation steps are the same as in Example 1, and Li is prepared 6.96 CaAlB 12 O 24 :0.04Eu 2+ phosphor.

[0043] Table 2 Preparation of Li 6.96 CaAlB 12 O 24 :0.04Eu 2+ Raw materials for phosphors

[0044]

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Abstract

The invention provides a boroaluminate ultraviolet fluorescent material and a preparation method and application thereof, belonging to the technical field of luminescent materials. The rare earth boroaluminate ultraviolet fluorescent material provided by the invention has a chemical formula of Li 7‑x MALB 12 o 24 :xEu 2+ , M is one or more of Ca, Mg, Sr and Ba, 0

Description

technical field [0001] The invention belongs to the technical field of luminescent materials, and in particular relates to a boro-aluminate ultraviolet fluorescent material and a preparation method and application thereof. Background technique [0002] Ultraviolet emitting fluorescent materials can generate ultraviolet radiation with higher photon energy. Ultraviolet fluorescent lamps made of ultraviolet emitting fluorescent materials have potential in engineering flaw detection, diazo copying, computer chip ultraviolet high-precision lithography, and environmentally friendly photocatalytic light sources. Value. [0003] Chinese patent CN1800303 discloses a preparation method of near-ultraviolet fluorescent powder, using Eu 2 O 3 , CaCl 2 , (NH 4 ) 2 SO 4 and HCl as raw materials, the structure of (Ca) was prepared by aqueous co-precipitation method. 1-x Eu x )SO 4 of near-ultraviolet phosphors, due to NH 4 The participation of Cl makes the crystallization of phosp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/80
CPCC09K11/774
Inventor 郑淞生郑雷铭王兆林李钷
Owner XIAMEN UNIV