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Columbate or tantalate fluorescence material used in white-light LED, and its preparation method

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

Inactive Publication Date: 2013-07-17
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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  • Columbate or tantalate fluorescence material used in white-light LED, and its preparation method
  • Columbate or tantalate fluorescence material used in white-light LED, and its preparation method
  • Columbate or tantalate fluorescence material used in white-light LED, and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0133] CaCO 3 , Eu 2 O 3 , Nb 2 O 5 Follow Ca 2 EuNbO 6 The stoichiometric ratio is weighed, and after mixing in a mortar, it is put into a corundum crucible with a lid and pre-fired at 625°C for 24 hours. The obtained powder is fully ground and then fired at 1000℃, 1200℃ and 1500℃ for 24h. Made into pure Ca 2 EuNbO 6 Fluorescent material. See the test results figure 1 .

Embodiment 2

[0135] CaCO 3 , Eu 2 O 3 , Nb 2 O 5 Follow Ca 2 EuNbO 6 The stoichiometric ratio is weighed, mixed evenly in a mortar, put into a corundum crucible with a lid, and pre-fired in a hydrogen atmosphere furnace at 625°C for 24 hours. The obtained powder was fully ground and then fired at 1700°C for 24 hours. Make pure Ca2EuNbO6 fluorescent material. The test result is comparable to Example 1.

Embodiment 3

[0137] CaCO 3 , Eu 2 O 3 , Nb 2 O 5 Follow Ca 2 EuNbO 6 The stoichiometric ratio is weighed, and after mixing in a mortar, it is put into a corundum crucible with a lid and pre-fired at 625°C in an oxygen atmosphere furnace for 24 hours. The obtained powder was fully ground and then fired at 1300°C for 24 hours. Made into pure Ca 2 EuNbO 6 Fluorescent material. The test result is comparable to Example 1.

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Abstract

The invention relates to a columbate or tantalate fluorescence material used in white-light LED, and its preparation method. The columbate or tantalate fluorescence material comprises undoped columbate or tantalite, transition metal doped columbate or tantalite, Tl-like ion doped columbate or tantalite having an s<2> configuration, rare earth element doped columbate or tantalite, and Tl-like ion and rare earth ion co-doped columbate or tantalite. The material can be used in the white-light LED, and relevant display and illumination devices. The columbate or tantalate fluorescence material has the advantages of cheap and easily available raw materials, simple preparation technology, stable chemical properties, and excellent luminescence performance, and is an ideal phosphor 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, and belongs to the field of fluorescent materials. Background technique [0002] White light LED is the fourth generation of electric light source for lighting after incandescent lamp, fluorescent lamp and energy-saving lamp. It is also called the 21st century green light source. It is environmentally friendly, has a long life, high efficiency, energy saving, resistance to harsh environments, simple structure, small size, and weight. 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 current lighting technology. Countries all attach great importance to them and have formulated development plans to step up research and development. [0003] Currently, self-lighting LED manufacturing technologies mainly include t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/78
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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