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Rare earth doped niobate single-crystal up-conversion luminescent material and preparation method thereof

A rare earth doping, luminescent material technology, applied in the direction of polycrystalline material growth, single crystal growth, single crystal growth, etc.

Active Publication Date: 2019-06-11
SHANGHAI NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, there is no report on the crystal growth of erbium-doped potassium sodium niobate (Er-KNN) and the method of annealing to control the upconversion luminescence performance.

Method used

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  • Rare earth doped niobate single-crystal up-conversion luminescent material and preparation method thereof
  • Rare earth doped niobate single-crystal up-conversion luminescent material and preparation method thereof
  • Rare earth doped niobate single-crystal up-conversion luminescent material and preparation method thereof

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Embodiment Construction

[0020] Below in conjunction with accompanying drawing and embodiment the present invention will be further described

[0021] A rare earth-doped niobate single crystal up-conversion luminescent material of the present invention is an erbium-doped potassium sodium niobate (yEr-K x Na 1-x NbO 3 , Er-KNN) single crystal. Take by weighing raw material potassium carbonate (K 2 CO 3 ), sodium carbonate (Na 2 CO 3 ), niobium pentoxide (Nb 2 o 5 ) and erbium oxide (Er 2 o 3 ), where x is between 0.2 and 0.5, and y is between 0.1% and 0.5%, and the theoretical composition yEr-K is obtained by mixing evenly x Na 1-x NbO 3 .

[0022] The "theoretical component yEr-K" described in the present invention x Na 1-x NbO 3 ″ for K 2 CO 3 、Na 2 CO 3 , Nb 2 o 5 and Er 2 o 3 After mixing and heating, the Er-KNN solid solution polycrystalline material generated by the solid-state reaction method has the molecular formula yEr-K x Na 1-x NbO 3 ;

[0023] or K 2 CO 3 、Na ...

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Abstract

The invention relates to a rare earth doped niobate single-crystal up-conversion luminescent material and a preparation method thereof, and relates to the technical field of up-conversion luminescentmaterials. The method comprises the following steps: A, preparing a polycrystalline material having a theoretical composition of yEr-K<x>Na<1-x>NbO<3> according to a molar ratio; B, preparing a crystal growth starting material according to a molar ratio; C, putting the crystal growth starting material into a growth crucible, and growing a Er-KNN single crystal by using a top seed crystal growth method at a temperature of 1000-1400 DEG C; D, performing annealing on the Er-KNN single crystal; and E, testing up-conversion luminescence properties of the product. The method provided by the invention can grow the large-sized Er-KNN single crystal, in particular, the up-conversion luminescence characteristics of the product disappear after vacuum annealing at a temperature of 400-600 DEG C, and the up-conversion luminescence intensity of the product is enhanced by nearly 20 times after oxygen annealing at a temperature of 700-800 DEG C; therefore, the Er-KNN single crystal provides a solid technical material basis for the fields such as oxygen sensors and optical waveguides.

Description

technical field [0001] The invention relates to the technical field of up-conversion luminescent materials, in particular to a rare-earth-doped niobate single-crystal up-conversion luminescent material and a preparation method thereof. Background technique [0002] Up-conversion luminescence is a luminescence process in which long-wavelength light is used to excite short-wavelength light. It plays an important role in the fields of optical waveguide amplifiers, lasers, and sensors. Rare earth up-conversion luminescence is the process of utilizing the unique electron layer structure of rare earth elements to achieve up-conversion luminescence. Compared with other materials, rare earth up-conversion luminescent materials have the advantages of long average lifetime and high conversion efficiency, which have attracted widespread attention at home and abroad. [0003] In recent years, people have higher and higher requirements for the performance of rare earth luminescent mater...

Claims

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Application Information

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IPC IPC(8): C30B15/00C30B29/30C30B33/02
Inventor 赵祥永薛赛东罗豪甦邓昊王飞飞其他发明人请求不公开姓名
Owner SHANGHAI NORMAL UNIVERSITY
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