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A near-ultraviolet-excited charge-compensated red-light borophosphate luminescent material and its preparation method

A technology of charge compensation and borophosphate, which is applied in the direction of luminescent materials, chemical instruments and methods, etc., can solve the problems of wide application limitations, insufficient efficiency, harsh synthesis conditions, etc., and achieve high brightness, sufficient reaction, and low synthesis temperature. Effect

Active Publication Date: 2019-12-27
SHAANXI UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nitride red powder is considered to be the most potential red phosphor due to its high efficiency and stability, but its wide application is limited due to its harsh synthesis conditions.
For tungstate and molybdate red powders, the main problem remains that the efficiency is not high enough

Method used

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  • A near-ultraviolet-excited charge-compensated red-light borophosphate luminescent material and its preparation method
  • A near-ultraviolet-excited charge-compensated red-light borophosphate luminescent material and its preparation method
  • A near-ultraviolet-excited charge-compensated red-light borophosphate luminescent material and its preparation method

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preparation example Construction

[0034] A method for preparing a near-ultraviolet-excited charge-compensated red-light borophosphate luminescent material, comprising the following steps:

[0035] 1) According to the chemical composition K 1+x Ba 1-2x BP 2 o 8 :xEu 3+ , where Eu 3+ is the luminescence center, x=0.04~0.12. Weigh the raw material as K 2 CO 3 , BaCO 3 、H 3 BO 3 , NH 4 h 2 PO 4 、Eu 2 o 3 , and grind evenly to obtain a mixture;

[0036] 2) Heat the mixture to 600°C and hold it for 2 hours, then raise the temperature to 900°C at the same heating rate and hold it for 4 hours, then grind to obtain a near-ultraviolet-excited charge-compensated red-light borophosphate luminescent material.

[0037] or

[0038] 1) According to the chemical composition K 1+x Ba 1-2x BP 2 o 8 :xEu 3+ ,F - , where Eu 3+ is the luminescence center, x=0.04~0.12, the raw material is weighed as K 2 CO 3 、BaCO 3 、H 3 BO 3 , NH 4 h 2 PO 4 、Eu 2 o 3 and KF, and grind evenly to obtain the mixture; ...

Embodiment 1

[0045] 1) According to the chemical composition K 1+x Ba 1-2x BP 2 o 8 :xEu 3+ (x=0.04); accurately weigh K 2 CO 3 0.3657g, BaCO 3 0.8668g, (NH 4 ) 2 HPO 4 0.5745g, H 3 BO 3 0.3090g, Eu 2 o 3 0.0704g, and placed in an agate mortar, ground for 1h to make it uniform;

[0046] 2) Using a high-temperature solid-phase method, place the above-mentioned pretreated mixed solid powder in a corundum crucible, raise the temperature to 600° C. in an air atmosphere, and keep it warm for 2 hours. Then, the temperature was raised to 900° C. for 4 hours at the same heating rate. The system is naturally cooled to room temperature with the temperature of the furnace, and the final product is obtained through further grinding.

Embodiment 2

[0048] 1) According to the chemical composition K 1+x Ba 1-2x BP 2 o 8 :xEu 3+ (x=0.06); accurately weigh K 2 CO 3 0.3726g, BaCO 3 0.8274g, (NH 4 ) 2 HPO 4 0.5745g, H 3 BO 3 0.3090g, Eu 2 o 3 0.1056g, and placed in an agate mortar, ground for 1h to make it uniform;

[0049] 2) Using a high-temperature solid-phase method, place the pretreated mixed solid powder in a corundum crucible, raise the temperature to 600° C. in an air atmosphere, and keep it warm for 2 hours. Then, the temperature was raised to 900° C. for 4 hours at the same heating rate. The system is naturally cooled to room temperature with the temperature of the furnace, and the final product is obtained through further grinding.

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Abstract

The invention discloses a near ultraviolet excited charge compensation type infrared light borophosphate luminescence material and a preparation method thereof. The chemical composition of the material is K1+xBa1-2xBP2O8:xEu<3+>, K1+xBa1-2xBP2O8:xEu<3+>, F<-> or KBa0.8BP2O8:01Eu<3+>, 0.1R<+>, graphene, wherein Eu<3+> is the luminescent center, R<+> is a charge compensating agent, and x is 0.04 to 0.12. The preparation method using a high temperature solid phase technology comprises the following steps: accurately weighing raw materials according to the stoichiometric ratio of the target product, placing the raw materials in an agate mortar, and grinding the raw materials to make the raw materials uniform; placing the obtained pretreated mixed solid powder in a corundum crucible, heating the pretreated mixed solid powder to 600 DEG C in an air atmosphere, and keeping the temperature for 2 h; and rising the temperature 900 DEG C according to the same heating rate, keeping the temperature for 4 h, naturally cooling the obtained system with a furnace to room temperature, and further grinding the cooled powder to obtain the final product. The preparation method has the advantages of simplicity in operation, sufficient reaction and suitableness for production. The luminescence material prepared in the invention has the advantages of high luminescence efficiency, high brightness, excellent chroma and high stability.

Description

technical field [0001] The invention relates to the field of inorganic luminescent materials, in particular to a near-ultraviolet-excited charge-compensated red-light borophosphate luminescent material and a preparation method thereof. Background technique [0002] The widely used red phosphor is Y 2 o 2 S:Eu 3+ , its significant disadvantage is that its chemical properties are unstable and it is easy to release SO 2 gas, which reduces its luminous efficiency. At present, many red powders based on different materials, such as nitrides, borates, tungstates and molybdates, have become research hotspots. Nitride red powder is considered to be the most potential red phosphor due to its high efficiency and stability, but its wide application is limited due to its harsh synthesis conditions. For tungstate and molybdate red powders, the main problem remains that the efficiency is not high enough. Therefore, exploring and preparing new and efficient red powders has become an u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/81
CPCC09K11/774
Inventor 樊国栋胡荣玲邱小云冯昕钰
Owner SHAANXI UNIV OF SCI & TECH
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