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A rare earth-doped niobate single crystal up-conversion luminescent material and its preparation method

A rare earth doping, luminescent material technology, applied in the direction of polycrystalline material growth, single crystal growth, single crystal growth, etc., to achieve the effects of good repeatability, controllable growth process, and good up-conversion luminescence performance

Active Publication Date: 2021-05-04
SHANGHAI NORMAL UNIVERSITY
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  • Abstract
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  • 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.

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  • A rare earth-doped niobate single crystal up-conversion luminescent material and its preparation method
  • A rare earth-doped niobate single crystal up-conversion luminescent material and its preparation method
  • A rare earth-doped niobate single crystal up-conversion luminescent material and its preparation method

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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 present invention is a rare earth-doped niobate single crystal up-conversion light-emitting material and a preparation method thereof, and relates to the technical field of up-conversion light-emitting materials. x Na 1‑x NbO 3 B prepare crystal growth starting materials according to the molar ratio; C put the crystal growth starting materials into the growth crucible, and grow Er-KNN single crystal by top seed crystal growth method at a temperature of 1000-1400 ℃ ; D Annealing of Er‑KNN single crystals; E Testing the upconversion luminescence properties of the product. The invention can grow large size Er-KNN single crystal. In particular, the up-conversion luminescence characteristics of the product disappeared after vacuum annealing at a temperature of 400-600°C, and the up-conversion luminescence intensity of the product increased nearly 20 times after oxygen annealing at a temperature of 700-800°C. Therefore, Er‑KNN single crystals provide a solid technical material basis for oxygen sensors, optical waveguides and other fields.

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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Patent Type & Authority Patents(China)
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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