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An electrically adjustable up-conversion luminescent lead-free ferroelectric single crystal and its preparation method

A single crystal and single crystal technology, applied in the direction of single crystal growth, crystal growth, single crystal growth, etc., can solve the problems of low luminous intensity and non-adjustable luminous intensity, and achieve high luminous intensity, excellent ferroelectric properties, and high control degree Effect

Active Publication Date: 2018-03-27
JINGDEZHEN CERAMIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of low luminous intensity and non-adjustable light intensity of existing up-conversion luminescent materials. The present invention provides a new type of electrically regulated up-conversion luminescent lead-free ferroelectric single crystal material

Method used

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  • An electrically adjustable up-conversion luminescent lead-free ferroelectric single crystal and its preparation method
  • An electrically adjustable up-conversion luminescent lead-free ferroelectric single crystal and its preparation method
  • An electrically adjustable up-conversion luminescent lead-free ferroelectric single crystal and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0024] Na with a purity greater than 99.99% 2 CO 3 、 Bi 2 o 3 、TiO 2 and Er 2 o 3 After the powder is fully dried, according to the general formula (Na 0.5 Bi 0.49 Er 0.01 )TiO 3 ,in x =0.01, accurately weigh the powders of the stoichiometric ratio, and ball mill them for 10 hours to make them evenly mixed; put the mixture in a platinum crucible, and put the platinum crucible into a container filled with Bi 2 o 3 and Na 2 CO 3 Powder in the covered corundum crucible, where Bi 2 o 3 Powder, Na 2 CO 3 The molar ratio of the powder to the mixture in the platinum crucible is 0.2:0.2:1; the corundum crucible is placed in a muffle furnace, and a solid phase reaction is carried out at a temperature of 550°C for 10 hours to obtain (Na 0.5 Bi 0.49 Er 0.01 )TiO 3 Polycrystalline material; the obtained polycrystalline material is finely ground and sieved, and a certain proportion of Bi is added based on the total amount of polycrystalline material 2 o 3 As a single ...

Embodiment 2

[0029] Na with a purity greater than 99.99% 2 CO 3 、 Bi 2 o 3 、TiO 2 and Er 2 o 3 After the powder is fully dried, according to the general formula (Na 0.5 Bi 0.47 Er 0.03 )TiO 3 ,in x =0.03, accurately weigh the powders of the stoichiometric ratio, and ball mill them for 15 hours to make them evenly mixed; put the mixture in a platinum crucible, and put the platinum crucible into a container filled with Bi 2 o 3 and Na 2 CO 3 Powder in the covered corundum crucible, where Bi 2 o 3 Powder, Na 2 CO 3 The molar ratio of the powder to the mixture in the platinum crucible is 0.5:0.5:1; the corundum crucible is placed in a muffle furnace and sintered at a temperature of 600°C for 10 hours to obtain (Na 0.5 Bi 0.47 Er 0.03 )TiO 3 TiO 3 Polycrystalline material; the obtained polycrystalline material is finely ground and sieved, and a certain proportion of Bi is added based on the total amount of polycrystalline material 2 o 3 As a single flux, where Bi 2 o 3 ...

Embodiment 3

[0032] Na with a purity greater than 99.99% 2 CO 3 、 Bi 2 o 3 、TiO 2 and Er 2 o 3 After the powder is fully dried, according to the general formula (Na 0.5 Bi 0.45 Er 0.05 )TiO 3 ,in x =0.05, accurately weigh the powders of the stoichiometric ratio, and ball mill them for 20 hours to make them evenly mixed; put the mixture in a platinum crucible, and put the platinum crucible into a container filled with Bi 2 o 3 and Na 2 CO 3 Powder in the covered corundum crucible, where Bi 2 o 3 Powder, Na 2 CO 3 The molar ratio of the powder to the mixture in the platinum crucible is 0.8:0.8:1; the corundum crucible is placed in a muffle furnace and sintered at a temperature of 700°C for 10 hours to obtain (Na 0.5 Bi 0.45 Er 0.05 )TiO 3 Polycrystalline material; the obtained polycrystalline material is finely ground and sieved, and a certain proportion of Bi is added based on the total amount of polycrystalline material 2 o 3 As a single flux, where Bi 2 o 3 :(Na 0...

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Abstract

The invention discloses an electrically tunable up-conversion luminescence lead-free ferroelectric monocrystal material. The general chemical formula of the up-conversion luminescence lead-free ferroelectric monocrystal material is (Na0.5Bi(0.5-x)Erx)TiO3, wherein x is the molar ratio of doped Er, and x is larger than 0 and equal to or smaller than 0.05. The electrically tunable up-conversion luminescence lead-free ferroelectric monocrystal material has the advantage that the defects of high scattering imperfection to light, low luminescence intensity and the like of the conventional up-conversion luminescence ferroelectric material are overcome. The electrically tunable up-conversion luminescence lead-free ferroelectric monocrystal material prepared according to the invention has the characteristics that the up-conversion luminescence intensity is regulated via an electric field; the electrical regulating degree is 30 to 80%; the monochromaticity of fluorescence emitted by the electrically tunable up-conversion luminescence lead-free ferroelectric monocrystal material is high; the luminescence intensity is high; the photoluminescence property and the ferroelectric property are excellent; the application prospect in the fields of photoelectric sensors, lasers, LED technology and the like is wide.

Description

technical field [0001] The invention belongs to the field of optical-electrical multifunctional materials, in particular to an electrically adjustable up-conversion luminescent lead-free ferroelectric single crystal and a preparation method thereof. Background technique [0002] Up-conversion luminescent materials are materials that emit visible light when excited by infrared lasers, and have broad application prospects in anti-counterfeiting identification, solar cells, bioluminescent labels, and up-conversion lasers. At present, the commercial up-conversion luminescent materials are mainly fluorides, although they have lower phonon energy and higher up-conversion luminous efficiency; however, fluorides are toxic, and have poor thermal and chemical stability, which is extremely This greatly limits its widespread use. Environmentally friendly lead-free ferroelectric materials have good chemical stability, thermal stability and relatively low phonon energy, so they are used ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/24C30B15/00C30B33/02
CPCC30B15/00C30B29/24C30B33/02
Inventor 陈超江向平李小红李菊梅展红全涂娜陈云婧
Owner JINGDEZHEN CERAMIC UNIV
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