Reversible and photochromic phosphate material and preparation method thereof

A technology of photochromic materials and phosphates, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, etc., can solve the problems of poor anti-oxidation performance, little research on materials, slow development speed, etc., and achieve good anti-fatigue properties.

Active Publication Date: 2017-01-04
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, organic photochromic materials have some inherent defects, such as poor stability, poor oxidation resistance, and strong dependence of discoloration on the medium; inorganic photochromic materials have high stability and good anti-oxidation properties. Fatigue performance
[0004] Unfortunately, compared with the rapid development of organic photochromic materials and the fruitful results achieved so far, the research on inorganic photochromic materials is very limited, its development speed is very slow, and it is still in the initial research stage, and There is very little research on this type of material in China, and these problems largely limit the transformation of inorganic photochromic materials from research to practical application.

Method used

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  • Reversible and photochromic phosphate material and preparation method thereof
  • Reversible and photochromic phosphate material and preparation method thereof
  • Reversible and photochromic phosphate material and preparation method thereof

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preparation example Construction

[0051] The present invention also provides a method for preparing the above-mentioned phosphate reversible photochromic material, comprising: mixing Sr compound, Re 1 Compounds, phosphide-containing compounds, Eu-containing compounds, Mn-containing compounds and Re-containing 2 Compounds are mixed, pre-fired, and then fired in a weak reducing atmosphere to obtain a phosphate reversible photochromic material; Re 1 One of the rare earth elements Y or Lu; Re 2 is a rare earth element, and Re 1 with Re 2 Not the same element at the same time; the Sr compound, containing Re 1 Compounds, Eu-containing compounds, Mn-containing compounds and Re-containing 2 Sr, Re in the compound 1 , Eu, Mn and Re 2 The molar ratio is (9-x-y):(1-z):x:y:z; 0

[0052] Among them, the Re 2 , x, y and z are the same as above, and will not be repeated here.

[0053] In the present invention, there is no particular limitation on the sources of all raw materials, and commerci...

Embodiment 1

[0063] According to the following chemical composition: Sr 8.78 Y(PO 4 ) 7 :0.02Eu 2+ ,0.2Mn 2+ , Weigh strontium carbonate, yttrium oxide, ammonium dihydrogen phosphate, europium oxide and manganese carbonate respectively, mix and grind until uniform, put the resulting mixture in a corundum crucible, put it in a muffle furnace, and heat up to 600°C, keep warm for 4 hours, take it out after cooling to room temperature naturally, and grind it evenly again, then put it into a tube furnace and heat it up to 1300°C for 4 hours, while passing a weak reducing gas (volume ratio of N 2 :H 2 =80%:10%). Finally, after it is naturally cooled to room temperature, it is taken out and ground again to obtain a phosphate reversible photochromic material.

[0064] Utilize ultraviolet-visible spectrophotometer to analyze the phosphate reversible photochromic material obtained in embodiment 1, obtain its diffuse reflectance spectrogram after ultraviolet light and visible light alternate ir...

Embodiment 2

[0066] According to the following chemical composition: Sr 8.77 Y(PO 4 ) 7 :0.03Eu 2+ ,0.2Mn 2+ , Weigh strontium carbonate, yttrium oxide, ammonium dihydrogen phosphate, europium oxide and manganese carbonate respectively, mix and grind until uniform, put the resulting mixture in a corundum crucible, put it in a muffle furnace, and heat up to 500°C, keep warm for 5 hours, take it out after cooling to room temperature naturally, and grind it evenly again, then put it into a tube furnace and heat it up to 1350°C for 4 hours, while passing a weak reducing gas (volume ratio of N 2 :H 2 =80%:10%). Finally, after it is naturally cooled to room temperature, it is taken out and ground again to obtain a phosphate reversible photochromic material.

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Abstract

The invention provides a reversible and photochromic phosphate material and a preparation method thereof. The reversible and photochromic phosphate material is Sr9-x-yRe1(1-z)(PO4)7: xEu<2+>, yMn<2+> and zRe2<3+>, wherein Re1 represents Y or Lu, Re2 represents a rare earth element, x represents the doped molar weight of Eu<2+> and is greater than 1 but is smaller than or equal 0.1, y represents doped molar weight of Mn<2+> and is greater than 1 but is smaller than or equal 2, z represents the doped molar weight of the Re2 and is greater than 0 but is smaller than or equal 0.02. Compared with the prior art, the reversible and photochromic phosphate material is an inorganic, reversible and photochromic material of Eu<2+> and Mn<2+> co-doped phosphate matrix, and the material color also produces reversible change therewith after being subjected to ultraviolet light and visible light alternated irradiation. In addition, the photochromic fatigue resistance characteristics of the material are good, and the color change degree of the inorganic photochromic material can be adjusted and controlled to some degree through other rare earth element co-doping means.

Description

technical field [0001] The invention belongs to the technical field of inorganic photochromic materials, in particular to a phosphate reversible photochromic material and a preparation method thereof. Background technique [0002] Photochromism means that after a material is irradiated by a certain electromagnetic wave, its absorption spectrum changes, resulting in discoloration, and after being irradiated again by an electromagnetic wave of another wavelength (or under the action of heating), it changes again. The process of changing back to the original color. It is precisely because of the reversible change of this color that this light-sensitive material has potential application prospects in many fields: such as protective camouflage, decoration, optical information storage and recording, optical modulation and optical switches, sensors, Memory components, photochromic coated glass, coating industry, textiles, self-image holographic recording photography and radiation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K9/00
CPCC09K9/00
Inventor 金亚洪胡义华
Owner GUANGDONG UNIV OF TECH
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