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A strontium aluminate-based up-conversion luminescent material and its preparation method

A luminescent material, strontium aluminate technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problem that the luminescence peak in the green light band is not a single luminescence peak, and achieve high up-conversion luminescence intensity, adjustable color, chemical Good effect with physical stability

Inactive Publication Date: 2011-12-07
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are very few reports on upconversion luminescent materials based on strontium aluminate. The only one is that N. Rakov et al. reported that they were prepared by combustion method in Appl.Phys.B, 2010, 98, 435-438. The upconversion luminescence phenomenon of erbium and ytterbium co-doped strontium aluminate matrix, but the luminescence peak in the green band is not a single luminescence peak
According to the survey, other rare earth ion-doped strontium aluminate-based upconversion luminescent materials have not been reported so far

Method used

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  • A strontium aluminate-based up-conversion luminescent material and its preparation method
  • A strontium aluminate-based up-conversion luminescent material and its preparation method
  • A strontium aluminate-based up-conversion luminescent material and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Preparation of Sr by solid-state reaction method 0.90 Li 0.03 Ho 0.01 Yb 0.06 Al 2 o 4 Up-converting luminescent material.

[0036] Raw material selection SrCO 3 、Al 2 o 3 、Ho 2 o 3 , Yb 2 o 3 and Li 2 CO 3 , press Sr 0.90 Li 0.03 Ho 0.01 Yb 0.06 Al 2 o 4 The stoichiometric ratio of Sr, Al, Ho, Yb and Li elements in the selected raw materials is weighed, specifically: 2.660 grams of SrCO 3 , 2.039 g Al 2 o 3 , 0.038 g Ho 2 o 3 , 0.236 g Yb 2 o 3 , 0.023 g Li 2 CO 3 . After mixing these raw materials, add absolute ethanol, grind in an agate mortar and mix thoroughly to obtain powder X 1 , wherein the mass ratio of absolute ethanol to the raw material mixture is 3:1. Powder X 1 Pre-fired in an alumina crucible, the pre-fired temperature is 900°C, the pre-fired atmosphere is air, the heating rate is 3°C / min, and the pre-fired powder is obtained after 4 hours of natural cooling. X 2 . The pre-fired powder X 2 After grinding, put it in an al...

Embodiment 2

[0039] Preparation of Sr by solid-state reaction method 0.90 Na 0.03 Ho 0.01 Yb 0.06 Al 2 o 4 Up-converting luminescent material.

[0040] Raw material selection SrCO 3 、Al 2 o 3 、Ho 2 o 3 , Yb 2 o 3 and Na 2 CO 3 , press Sr 0.90 Na 0.03 Ho 0.01 Yb 0.06 Al 2 o 4 The stoichiometric ratio of Sr, Al, Ho, Yb and Na elements in the selected raw materials is weighed, specifically: 2.660 grams of SrCO 3 , 2.039 g Al 2 o 3 , 0.038 g Ho 2 o 3 , 0.236 g Yb 2 o 3 , 0.032 g Na 2 CO 3 . After mixing these raw materials, add absolute ethanol, grind in an agate mortar and mix thoroughly to obtain powder X 1 , wherein the mass ratio of absolute ethanol to the raw material mixture is 1:1. Powder X 1 Pre-fired in an alumina crucible, the pre-fired temperature is 900°C, the pre-fired atmosphere is air, the heating rate is 3°C / min, and the pre-fired powder is obtained after 4 hours of natural cooling. X 2 . The pre-fired powder X 2 After grinding, put it in an al...

Embodiment 3

[0043] Preparation of Sr by solid-phase reaction 0.90 K 0.03 Ho 0.01 Yb 0.06 Al 2 O 4 Upconverting luminescent material.

[0044] Raw material selection SrCO 3 , Al 2 O 3 , Ho 2 O 3 , Yb 2 O 3 and K 2 CO 3 , press Sr 0.90 K 0.03 Ho 0.01 Yb 0.06 Al 2 O 4 The stoichiometric ratio of Sr, Al, Ho, Yb and K elements in the selected raw materials are weighed, specifically: 2.660 grams of SrCO 3 , 2.039 g Al 2 O 3 , 0.038 g Ho 2 O 3 , 0.236 g Yb 2 O 3 , 0.042 g K 2 CO 3 . After mixing these raw materials, add anhydrous ethanol, grind in agate mortar and mix thoroughly to obtain powder X 1 , wherein the mass ratio of absolute ethanol and raw material mixture is 3:1. The powder X 1 Placed in an alumina crucible for pre-firing, the pre-firing temperature is 900 ° C, the pre-firing atmosphere is air, the heating rate is 3 ° C / min, and the pre-firing powder X is obtained after being kept for 4 hours and naturally cooled. 2 . The pre-burned powder X 2 After...

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Abstract

The invention relates to an infrared ray excited strontium aluminate based up-conversion luminescent functional material and a preparation thereof. The up-conversion luminescent material is obtained by doping a rare earth element and / or alkali metal element in a strontium aluminate matrix with a monoclinal structure and is of a monoclinal strontium aluminate structure. The chemical components of the up-conversion luminescent material meet the following chemical general formula: Sr(1-x-y-z)AxMyRzAl2O4, wherein A is one or more of alkali metal elements such as Li<+>, Na<+> and K<+>, and x is larger than or equal to 0 and less than or equal to 0.40; M is selected from rare earth elements such as Ho<3+> and Tm<3+>, and y is larger than or equal to 0.0005 and less than or equal to 0.10; and R is selected from rare earth elements such as La<3+>, Yb<3+> and the like, and z is larger than or equal to 0.001 and less than or equal to 0.30. The strontium aluminate based up-conversion luminescentmaterial has good physical and chemical stabilities, no radioactive contamination, high luminous intensity and adjustable color, is easy to synthesize and can be widely used in the fields of biomolecule fluorescence labeling, lasers, three-dimensional display, infrared detection, forgery prevention, solar batteries and the like.

Description

technical field [0001] The invention relates to a class of strontium aluminate-based up-conversion light-emitting materials Sr excited by infrared light 1-x-y-z A x M y R z Al 2 O 4 The invention and the preparation method thereof belong to the field of luminescent materials. Background technique [0002] Upconversion luminescent material is a material that can emit visible light under the excitation of infrared laser. It has a wide range of application prospects in the fields of anti-counterfeiting, infrared detection, three-dimensional display, short-wavelength all-solid-state lasers, biomarkers, and solar cells. The host materials for up-conversion luminescence mainly include fluorides, oxides, chlorides, and the like. Fluoride host materials have many advantages, such as luminescent rare earth ions can be easily doped into the fluoride host; the fluoride host has a low phonon energy (≈500 cm -1 ) and higher up-conversion luminescence probability, etc., so people h...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K11/80
Inventor 王旭升唐棉棉彭登峰李艳霞王维
Owner TONGJI UNIV
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