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Near ultraviolet excited charge compensation type red-light phosphate light emitting material and preparation method thereof

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

Inactive Publication Date: 2016-07-06
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • 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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  • Near ultraviolet excited charge compensation type red-light phosphate light emitting material and preparation method thereof
  • Near ultraviolet excited charge compensation type red-light phosphate light emitting material and preparation method thereof
  • Near ultraviolet excited charge compensation type red-light phosphate light emitting material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 1) Accurately weigh SrCO 3 1.3287g, (NH 4 ) 2 HPO 4 1.3206g, Li 2 CO 3 0.0185g, Eu 2 o 3 0.088g, and placed in an agate mortar, ground for 1h to make it evenly mixed to obtain a mixed solid powder;

[0029] 2) Using the high-temperature solid-phase method, place the above-mentioned mixed solid powder in a corundum crucible, raise the temperature from room temperature to 1050°C at a rate of 25°C / min in an air atmosphere, and calcinate at 1050°C for 2 hours. After the calcination, The system is naturally cooled to room temperature with the furnace temperature, and the product is further ground to obtain the chemical composition of Sr 1.8 P 2 o 7 :0.1Eu 3+ ,0.1Li + red light phosphate phosphor.

Embodiment 2

[0031] 1) Accurately weigh SrCO 3 1.3287g, (NH 4 ) 2 HPO 4 1.3206g, K 2 CO 3 0.0346g, Eu 2 o 3 0.088g, and placed in an agate mortar, ground for 1h to make it evenly mixed to obtain a mixed solid powder;

[0032] 2) Using the high-temperature solid-phase method, place the above-mentioned mixed solid powder in a corundum crucible, raise the temperature from room temperature to 1050°C at a rate of 25°C / min in an air atmosphere, and calcinate at 1050°C for 2 hours. After the calcination, The system is naturally cooled to room temperature with the furnace temperature, and the product is further ground to obtain the chemical composition of Sr 1.8 P 2 o 7 :0.1Eu 3+ ,0.1K + red light phosphate phosphor.

Embodiment 3

[0034] 1) Accurately weigh SrCO 3 1.4468g, (NH 4 ) 2 HPO 4 1.3206g, Na 2 CO 3 0.0053g, Eu 2 o 3 0.018g, and placed in an agate mortar, ground for 1h to make it evenly mixed to obtain a mixed solid powder;

[0035] 2) Using the high-temperature solid-phase method, place the above-mentioned mixed solid powder in a corundum crucible, raise the temperature from room temperature to 1050°C at a rate of 25°C / min in an air atmosphere, and calcinate at 1050°C for 2 hours. After the calcination, The system is naturally cooled to room temperature with the furnace temperature, and the product is further ground to obtain the chemical composition of Sr 1.96 P 2 o 7 :0.02Eu 3+ ,0.02Na + red light phosphate phosphor.

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Abstract

The invention provides a near ultraviolet excited charge compensation type red-light phosphate light emitting material and a preparation method thereof. The near ultraviolet excited charge compensation type red-light phosphate light emitting material chemically consists of Sr2-2xP2O7:xEu<3+>, xM<+>, wherein Eu<3+> is a light emitting center; M<+> is a charge compensation agent; M=Li, Na or K; and x=0.02-0.16. Na<+> is a charge compensation agent with the optimal property and can improve the emission intensity and the chromaticity of red light to the maximum extent. The preparation method comprises the following steps: by taking a high temperature solid state method, weighing raw materials SrCO3, Li2CO3, Na2CO3, K2CO3, (NH4)2HPO4 and Eu2O3 according to a chemical weighing ratio of target products, uniformly grinding, calcining in the air atmosphere, and performing furnace cooling to the room temperature, thereby obtaining a target product. The preparation method has the characteristics of being simple to operate, sufficient in reaction, applicable to production and the like, and the prepared light emitting material is high in light emission efficiency, high in brightness, good in chromaticity and good in stability.

Description

technical field [0001] The invention belongs to the field of inorganic luminescent materials, and in particular relates to a near-ultraviolet-excited charge-compensated red-light phosphate 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 bec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/81C09K11/71
CPCC09K11/7738
Inventor 樊国栋林忱刘保健
Owner SHAANXI UNIV OF SCI & TECH
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