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Symbiotic layered perovskite material with reversible regulation and control performance and preparation method thereof

A perovskite material and layered technology, which is applied in the field of symbiotic layered perovskite materials and preparation, can solve the problems of limiting the practical application of materials, and the performance of inorganic photochromic materials is not ideal, so as to achieve good reversible control effect

Active Publication Date: 2020-12-22
CIVIL AVIATION UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the past, the research on photochromic materials mainly focused on organic substances, and the research on inorganic photochromic materials was relatively less, and the performance of inorganic photochromic materials was not ideal, which limited the practical application of such materials, which requires Researchers develop new inorganic photochromic materials

Method used

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  • Symbiotic layered perovskite material with reversible regulation and control performance and preparation method thereof
  • Symbiotic layered perovskite material with reversible regulation and control performance and preparation method thereof
  • Symbiotic layered perovskite material with reversible regulation and control performance and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033]Prepare SrBi7.8-xErxYb0.2Ti7O27Ceramic material, where x=0, the preparation method is as follows:

[0034]Weigh 0.4474 grams of SrCO3, 5.6720 grams of Bi2O3, 0.1183 g Yb2O3, 1.6942 g TiO2Place it in a clean agate tank, use absolute ethanol (99.7%) as the medium, and mill on a planetary ball mill for 24 hours. The ball milled product is dried in an oven to obtain a dried powder. Grind the dried powder with an agate mortar, then place it in a corundum crucible, put it in a box furnace, continue to raise the temperature to 1100°C for pre-firing for 5 hours, and then stop the program after cooling to 550°C. The product obtained after cooling in the furnace was ground finely with an agate mortar, compressed into a disc with a diameter of 13mm by a tablet press, and then covered with alumina powder, placed on an alumina plate and sintered in the air at 1200°C for 1.5 hours, and finally obtained Flake SrBi7.8-xErxYb0.2Ti7O27Ceramic material.

Embodiment 2

[0036]Prepare SrBi7.8-xErxYb0.2Ti7O27Ceramic material, where x=0.01, the preparation method is as follows:

[0037]Weigh 0.4474 grams of SrCO3, 5.6647 grams of Bi2O3, 0.0057 g Er2O3, 0.1183 g Yb2O3, 1.6942 g TiO2Place it in a clean agate tank, use absolute ethanol (99.7%) as the medium, and mill on a planetary ball mill for 24 hours. The ball milled product is dried in an oven to obtain a dried powder. Grind the dried powder with an agate mortar, then place it in a corundum crucible, put it in a box furnace, continue to raise the temperature to 1100°C for pre-firing for 5 hours, and then stop the program after cooling to 550°C. The product obtained after cooling in the furnace was ground finely with an agate mortar, compressed into a disc with a diameter of 13mm by a tablet press, and then covered with alumina powder, placed on an alumina plate and calcined at 1200°C for 90 minutes in the air. Obtain flake SrBi7.8-xErxYb0.2Ti7O27Ceramic material.

Embodiment 3

[0039]Prepare SrBi7.8-xErxYb0.2Ti7O27Ceramic material, where x=0.05, the preparation method is as follows:

[0040]Weigh 0.4474 grams of SrCO3, 5.6356 grams of Bi2O3, 0.0287 g Er2O3, 0.1183 g Yb2O3, 1.6942 g TiO2Place it in a clean agate tank, use absolute ethanol (99.7%) as the medium, and mill on a planetary ball mill for 24 hours. The ball milled product is dried in an oven to obtain a dried powder. Grind the dried powder with an agate mortar, then place it in a corundum crucible, put it in a box furnace, continue to raise the temperature to 1100°C for pre-firing for 5 hours, and then stop the program after cooling to 550°C. The product obtained after cooling in the furnace was ground finely with an agate mortar, compressed into a disc with a diameter of 13mm by a tablet press, and then covered with alumina powder, placed on an alumina plate and calcined at 1200°C for 90 minutes in the air. Obtain flake SrBi7.8-xErxYb0.2Ti7O27Ceramic material.

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Abstract

The invention discloses a symbiotic layered perovskite material with reversible regulation and control performance and a preparation method thereof. The chemical formula of the material is SrBi < 7.8-x> Er < x > Yb < 0.2 > Ti < 7 > O < 27 >, and x is equal to 0, 0.01, 0.05, 0.1 or 0.15. The preparation method comprises the following steps: taking Bi2O3, SrCO3, Er2O3, Yb2O3 and TiO2 as raw materials, mixing and grinding according to a chemical ratio, and synthesizing by a high-temperature solid-phase reaction method. The preparation method has the advantages that the SrBi < 7.8-x > ErxYb < 0.2> Ti<7> O <27> ceramic material has an obvious color changing effect under irradiation of near ultraviolet light (405 nm), and the color of the material is changed from light yellow to grey black. Meanwhile, the ceramic material has up-conversion luminescence excited by near-infrared light (980nm), the up-conversion luminescence intensity of the material forms reversible regulation and control under near-ultraviolet light (405nm) and thermal annealing excitation, the response is rapid, and the repeatability is good. The SrBi < 7.8-x > Er < x > Yb < 0.2 > Ti < 7 > O < 27 > material can be applied to the fields of optical switches, optical storage, safety anti-counterfeiting and the like in the future.

Description

Technical field[0001]The invention belongs to the technical field of light control materials, and specifically relates to a symbiotic layered perovskite material with reversible control performance and a preparation method.Background technique[0002]The effective control of material physical and chemical properties is of great significance to the development of high-efficiency electronic components. Photochromism refers to a phenomenon in which a material can change color after being excited by a specific light source. In the past, the research on photochromic materials mainly focused on organics, while the research on inorganic photochromic materials was relatively small, and the performance of inorganic photochromic materials was not ideal, which limited the practical application of such materials. Researchers develop new inorganic photochromic materials.[0003]Up-conversion luminescence is the process of radiating a high-energy photon under the excitation of two or more low-energy ...

Claims

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Application Information

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IPC IPC(8): C04B35/475C04B35/50C04B35/622C09K9/00
CPCC04B35/475C04B35/50C04B35/622C09K9/00C04B2235/3213C04B2235/3224C04B2235/3232C04B2235/3298C04B2235/602C04B2235/656C04B2235/6567C04B2235/6583
Inventor 魏通申灵慧石永超
Owner CIVIL AVIATION UNIV OF CHINA
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