Niobate or tantalite fluorescent material used for white light LED and preparation method thereof

A fluorescent material, niobate technology, applied in the field of fluorescent materials, can solve the problem of few research reports

Inactive Publication Date: 2010-12-22
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are relatively few research reports on niobate and tantalate materials

Method used

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  • Niobate or tantalite fluorescent material used for white light LED and preparation method thereof
  • Niobate or tantalite fluorescent material used for white light LED and preparation method thereof
  • Niobate or tantalite fluorescent material used for white light LED and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0133] Raw material CaCO 3 、Eu 2 o 3 , Nb 2 o 5 According to Ca 2 EuNbO 6 The stoichiometric ratio was weighed, mixed evenly in a mortar, put into a corundum crucible with a cover and pre-fired at 625°C for 24h. The obtained powder is fully ground and then fired at 1000°C, 1200°C, and 1500°C for 24 hours respectively. Made into pure Ca 2 EuNbO 6 fluorescent material. see test results figure 1 .

Embodiment 2

[0135] Raw material CaCO 3 、Eu 2 o 3 , Nb 2 o 5 According to Ca 2 EuNbO 6 The stoichiometric ratio was weighed, mixed evenly in a mortar, put into a corundum crucible with a cover, and pre-fired in a hydrogen atmosphere furnace at 625°C for 24h. The obtained powders were fully ground and then fired at 1700°C for 24 hours respectively. Made of pure Ca2EuNbO6 fluorescent material. Test result is comparable with embodiment 1.

Embodiment 3

[0137] Raw material CaCO 3 、Eu 2 o 3 , Nb 2 o 5 According to Ca 2 EuNbO 6 The stoichiometric ratio was weighed, mixed evenly in a mortar, put into a corundum crucible with a cover, and pre-fired in an oxygen atmosphere furnace at 625°C for 24h. The obtained powders were fully ground and then fired at 1300°C for 24 hours respectively. Made into pure Ca 2 EuNbO 6 fluorescent material. Test result is comparable with embodiment 1.

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PUM

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Abstract

The invention relates to a niobate or tantalite fluorescent material used for a white light LED and a preparation method thereof. The material comprises the following components: non-doped niobate or tantalite, transition metal doped niobate or tantalite, T1 like ion doped niobate or tantalite with an s2 configuration, rare-earth element doped niobate or tantalite and T1 like ion and rear earth codoped niobate or tantalite. The materials in the invention can be used for the white light LED and related display and lighting devices. The invention has cheap and easy available materials, simple preparation process, stable material chemical property and excellent luminescence performance, and the prepared niobate or tantalite flourescent material is an ideal fluorescent powder candidate material for the white light LED.

Description

technical field [0001] The invention relates to a niobate or tantalate fluorescent material for white light LEDs and a preparation method thereof, belonging to the field of fluorescent materials. Background technique [0002] White light LED is the fourth-generation lighting electric light source after incandescent lamps, fluorescent lamps and energy-saving lamps, or called the green light source in the 21st century. Lightweight, fast response, low working voltage and good safety. Replacing traditional lighting sources with LED solid-state light sources is the main trend in the development of lighting technology at present. All countries have attached great importance to it, formulated development plans one after another, and stepped up research and development. [0003] At present, there are mainly three kinds of preparation technologies for white LEDs: light conversion method, multi-color combination method and multi-quantum well method. The light conversion method uses ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78H01L33/00
CPCY02B20/181Y02B20/00
Inventor 黄富强夏玉娟
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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