Unlock instant, AI-driven research and patent intelligence for your innovation.

Inorganic powdery reversible photochromic material as well as preparation method and application

A technology of photochromic materials and inorganic powders, applied in the direction of color-changing fluorescent materials, chemical instruments and methods, etc., can solve the problems of short duration of discoloration energy, influence on product formation, environmental pollution, etc., and achieve simple and easy preparation process , easy synthesis, good reproducibility

Active Publication Date: 2017-06-13
GUANGDONG UNIV OF TECH
View PDF2 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the research on organic photochromic materials is developing rapidly, many of these materials have some disadvantages: such as environmental pollution, easy aging, poor stability, short duration of discoloration, etc.
The matrix components of these phosphate-based inorganic photochromic materials all contain halogen (such as fluorine, chlorine) elements, but the halogen will volatilize to a certain extent during the reaction process, which may generate some toxic gases and affect the formation of products at the same time.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Inorganic powdery reversible photochromic material as well as preparation method and application
  • Inorganic powdery reversible photochromic material as well as preparation method and application
  • Inorganic powdery reversible photochromic material as well as preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Weigh the raw materials strontium carbonate, basic magnesium carbonate, lithium carbonate, ammonium dihydrogen phosphate, europium oxide and manganese carbonate respectively according to the stoichiometric ratio of each element in the following expression: Sr 8.98 Mg 0.92 Li(PO 4 ) 7 :0.02Eu 2+ ,0.08Mn2+ , after fully mixing and grinding until uniform, put the obtained mixture in a corundum crucible, put it into a muffle furnace, raise the temperature to 450°C in the air environment, and keep it warm for 3 hours, take it out and grind it again after naturally cooling to room temperature uniform, then put it into a high-temperature tube furnace and heat up to 1300°C for calcination for 6 hours, while feeding a weak reducing gas (volume ratio of N 2 :H 2 =80%:20%). Finally, after it is naturally cooled to room temperature, it is taken out and ground again to obtain an inorganic powder reversible photochromic material. figure 1 The diffuse reflectance spectrum of the...

Embodiment 2

[0037] Weigh the raw materials strontium carbonate, basic magnesium carbonate, lithium carbonate, ammonium dihydrogen phosphate, europium oxide and manganese carbonate Sr according to the stoichiometric ratio of each element in the following expression 8.98 Mg 0.9 Li(PO 4 ) 7 :0.02Eu 2+ ,0.1Mn 2+ , after fully mixing and grinding until uniform, put the obtained mixture in a corundum crucible, put it into a muffle furnace, raise the temperature to 450°C in the air environment, and keep it warm for 3 hours, take it out and grind it again after naturally cooling to room temperature uniform, then put it into a high-temperature tube furnace and heat up to 1300°C for calcination for 6 hours, while feeding a weak reducing gas (volume ratio of N 2 :H 2 =80%:20%); finally, after it is naturally cooled to room temperature, it is taken out and ground again to obtain an inorganic powder reversible photochromic material. figure 2 The diffuse reflectance spectrum of the material prep...

Embodiment 3

[0039] Weigh the raw materials strontium carbonate, basic magnesium carbonate, lithium carbonate, ammonium dihydrogen phosphate, europium oxide and manganese carbonate according to the stoichiometric ratio of each element in the following expression: Sr 8.98 Mg 0.8 Li(PO 4 ) 7 :0.02Eu 2+ ,0.2Mn 2+ , after fully mixing and grinding until uniform, put the resulting mixture in a corundum crucible, put it into a muffle furnace, heat it up to 400°C in an air environment, and keep it warm for 5 hours. After cooling to room temperature naturally, take it out and grind it again to uniform, then put it into a high-temperature tube furnace and heat up to 1280°C for calcination for 8 hours, while feeding a weak reducing gas (volume ratio of N 2 :H 2 =80%:20%). Finally, after it is naturally cooled to room temperature, it is taken out and ground again to obtain an inorganic powder reversible photochromic material.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of inorganic photochromic materials, and discloses an inorganic powdery reversible photochromic material as well as a preparation method and application. The surface color of the material can generate a reversible change after the material is alternately irradiated by ultraviolet light and visible light; the structure expression of the material is Sr(9-x-z)Mg(1-y)A(PO4)7:xEu<2+>, yMn<2+>, zR<3+>, wherein A is an alkali metal element; R is at least one of rare earth elements Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu; x is the doping content of Eu<2+>; x is more than 0 but is not more than 0.1; y is the doping content of Mn<2+>; y is more than 0 but is not more than 0.5; z is the doping content of R; z is not less than 0 but is not more than 0.1. The inorganic powdery reversible photochromic material is simple in preparation process, is easy to synthesize, and is suitable for large-scale production. The stability of the photochromic property of the synthesized material is high; further, the fatigue resistance is good.

Description

technical field [0001] The invention belongs to the technical field of inorganic photochromic materials, in particular to an inorganic powder reversible photochromic material and its preparation method and application. Background technique [0002] As a kind of smart material, color-changing materials have always been a hot spot for scientists to pay attention to and study. Among them, a photochromic material refers to a substance whose absorption spectrum changes significantly under light of a certain wavelength, visually accompanied by a change in the color of the substance, and after being irradiated (or heated) by another wavelength of light to a certain temperature), the substance can return to its original color. The reversible response characteristics of photochromic materials to different wavelengths of light make this kind of materials have a wide range of application prospects in military and daily life: such as optical information storage and recording, photochro...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): C09K9/00
Inventor 金亚洪胡义华
Owner GUANGDONG UNIV OF TECH