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A kind of electric field-assisted synthesis method of eu2+ doped ternary alkaline earth metal silicon nitride phosphor

An electric field-assisted, synthetic method technology, applied in chemical instruments and methods, luminescent materials, etc., can solve the problems of long sintering cycle, affecting powder purity and luminous performance, and high sintering temperature, achieving short holding time, and facilitating production and packaging. , the effect of low sintering temperature

Active Publication Date: 2019-01-25
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The sintering temperature of this method is high, the sintering period is long, and the obtained powder contains impurity carbon, which affects the purity and luminescence performance of the powder, and further processing is required

Method used

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  • A kind of electric field-assisted synthesis method of eu2+ doped ternary alkaline earth metal silicon nitride phosphor
  • A kind of electric field-assisted synthesis method of eu2+ doped ternary alkaline earth metal silicon nitride phosphor
  • A kind of electric field-assisted synthesis method of eu2+ doped ternary alkaline earth metal silicon nitride phosphor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Use Si 3 N 4 ,Sr 3 N 2 , EuN as raw material powder, according to Sr 1.96 Si 5 N 8 : 0.04 Eu 3 N 4 : 1.402g, Sr 3 N 2 : 1.140g, EuN: 0.040g. Grind and mix the raw materials evenly and put them in the graphite mold. Under the vacuum condition of the cavity pressure 2 Si 5 N 8 The XRD standard card fully complies with high purity.

Embodiment 2

[0045] Use Si 3 N 4 ,Sr 3 N 2 , EuN as raw material powder, according to Sr 1.96 Si 5 N 8 : 0.04 Eu 3 N 4 : 1.402g, Sr 3 N 2 : 1.140g, EuN: 0.040g. Grind and mix the raw materials evenly and put them in the graphite mold. Under the vacuum condition of the cavity pressure 2 Si 5 N 8 The XRD standard card fully complies with high purity.

Embodiment 3

[0047] Use Si 3 N 4 ,Sr 3 N 2 , EuN as raw material powder, according to Sr 1.96 Si 5 N 8 : 0.04 Eu 3 N 4 : 1.402g, Sr 3 N 2 : 1.140g, EuN: 0.040g. Grind and mix the raw materials evenly and put them in the graphite mold. Under the vacuum condition of the cavity pressure 2 Si 5 N 8 The XRD standard card fully complies with high purity.

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Abstract

The invention discloses an electric field-assisted synthesis method of Eu<2+>-doped ternary alkaline earth metal silicon nitride phosphor. The method comprises weighing nitride raw material powder according to a formula, uniformly mixing the powder, placing the mixed powder in a graphite mold and preparing the phosphor through an electric field-assisted synthesis technology. The method concretely comprises uniform mixing, vacuum synthesis and phosphor loose block grinding. The method prevents separation of a large amount of a segregation phase in the process of slow heating, can reduce the sintering temperature, has simple processes, introduces few impurities, has a low sintering temperature, has short thermal insulation time, and can produce a product with high purity and good crystallinity.

Description

technical field [0001] The present invention relates to a class of inorganic luminescent materials, in particular to a kind of M-Si-N:Eu 2+ (M:Si:N=1:1:2, 2:5:8; M=Ca, Sr, Ba) series phosphor powders are rapidly prepared by electric field-assisted synthesis. Background technique [0002] Compared with traditional incandescent lamps, phosphor-converted white light-emitting diodes (pc-WLEDs) have unique and excellent properties such as energy saving, environmental protection, small size and long life, and are expected to become an indispensable solid-state light source for the next-generation lighting and display industries. The brightness, color rendering index, and stability of white LEDs (WLEDs) usually depend largely on the quality of the phosphor. At present, the most mature white light technology is the blue LED chip developed by Japanese companies coated with yellow phosphor YAG: Ce 3+ Synthetic. But since YAG: Ce 3+ The lack of red light components in phosphors lea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09K11/59
CPCC09K11/0883C09K11/7734
Inventor 沈强袁海龙黄志峰张剑文陈斐张联盟
Owner WUHAN UNIV OF TECH
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