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Novel inorganic compound photochromic material, as well as preparation and use thereof

A technology of photochromic materials and inorganic compounds, applied in luminescent materials, chemical instruments and methods, static memories, etc., to achieve the effects of obvious changes in light absorption, fast discoloration response, and high thermal decomposition temperature

Inactive Publication Date: 2009-07-08
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the existing literature reports, no inorganic compound that causes discoloration due to phase transition has been synthesized so far.

Method used

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  • Novel inorganic compound photochromic material, as well as preparation and use thereof
  • Novel inorganic compound photochromic material, as well as preparation and use thereof
  • Novel inorganic compound photochromic material, as well as preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1.Hg 2 AsCl 2 Compound Synthesis:

[0027] Hg 2 AsCl 2 It is obtained by medium-high temperature solid-phase synthesis method, and the specific reaction formula is:

[0028] 1Hg 2 Cl 2 +1As→Hg 2 AsCl 2

[0029] The specific operation steps are:

[0030] Put the corresponding mass of reactants into a sealed vacuum glass tube for heating, raise the temperature to 300°C at a rate of 50°C / h, keep the temperature for 120 hours, then cool down to 50°C at a rate of 3°C / h, and finally turn off the power. Take out the glass tube to get the target compound in the form of orange-yellow flaky crystals.

[0031] This type of compound is a monoclinic crystal system, the space group is C2 / m (No.12), and the unit cell parameter is a=13.94 b=8.21 c=8.92 α=γ=90°, β=97, Z=8.

[0032] In addition, we conducted optical performance and photochromic tests on the obtained chlorine, arsenic and mercury compounds. A single crystal of mercury chloride, arsenic and mercur...

Embodiment 2

[0033] Example 2.Hg 2 AsCl 2 Single Crystal Growth:

[0034] Single crystal materials were prepared by the Bridgman method.

[0035] Seed crystals were added to the crucible, and the Hg 2 AsCl 2 The ternary compound pellet is placed on the seed crystal in the crucible, and then its crucible is placed in a single crystal furnace to melt Hg 2 AsCl 2 The ternary compound and the seed crystal are placed on the top of the single crystal furnace, and at a temperature of 550°C, the crucible’s descending speed is controlled at 25mm / h, and Hg with a smooth surface and no macro and micro defects can be grown. 2 AsCl 2 single crystal.

Embodiment 3

[0036] Example 3.Hg 2 AsCl 2 Thin film material growth:

[0037] Thin film material growth is accomplished by vacuum thermal evaporation.

[0038]The specific process is: high-purity Hg with a purity of 99.999% 2 Cl 2 , As and (or already obtained high-purity Hg 2 AsCl 2 Powder) Three kinds of powders are put into the vacuum evaporation chamber, and the vacuum degree is 1.5×10 -3 Evaporate under Pa, use single crystal silicon wafer or ITO film glass wafer as substrate, can prepare uniform thin film material on it, its composition can be obtained by adjusting the mutual ratio of three kinds of raw material evaporation, and the film thickness can be according to Requires adjustment of evaporation rate.

[0039] The obtained thin film material was irradiated with a 355nm nanosecond laser, and it was found that the response time of its color change reached the microsecond level, and the material could develop color when it was irradiated by light of different intensities an...

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Abstract

The invention discloses a novel inorganic compound photochromism material, a method for preparing the same and application thereof, and in particular relates to a photochromism material, a method for preparing the same and application thereof. The compound of the photochromism material has a chemical formula of Hg2AsCl2 which is a monoclinic system, the space group is C2 / m(No.12), and the unicellular parameters comprise that: a is equal to between 13.6 and 14.3, b is equal to between 7.9 and 8.5, c is equal to between 8.5 and 9.3, alpha is equal to gamma which is equal to 90 degrees, beta is equal to between 94 and 101, and Z is equal to 8. After discoloration, the structure of the photochromism material is the monoclinic system, the space group is C2 / m(No.12), and the unicellular parameters comprise that: a is equal to between 7.4 and 8.1, b is equal to between 7.9 and 8.5, c is equal to between 8.5 and 9.3, beta is equal to between 113 and 120, and Z is equal to 4. A compound, a monocrystal and a film material of the photochromism material are obtained by a vacuum high-temperature solid-phase synthesizing method, a Bridgman method and a vacuum heat vapor deposition method. The compound can be used for optical information storage, anti-counterfeit, laser protection, phase variation memory storage units, optical switches, optical information converters, self-development holographic recording photography, radiation quantifier and the like.

Description

Technical field: [0001] The invention relates to a novel inorganic compound photochromic material and its preparation method and application. Background technique: [0002] Photochromism refers to the change of the molecular structure of some materials under the action of light of a certain wavelength and intensity, resulting in a change in its color or absorption peak of light. Photochromic materials are mainly divided into two categories: organic compounds and inorganic compounds. Among them, organic photochromic materials are more researched and widely used, such as fulgid anhydride, spiropyran, azo compounds, diaryl heterocyclic vinyl etc. The research on inorganic photochromic materials is relatively less, mainly including various variable-valence metal oxides, metal halides and metal salt hydrates doped with impurities. In general, the color change mechanism of inorganic photochromic materials is due to electron transfer reactions in the crystal lattice. Some ions t...

Claims

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Application Information

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IPC IPC(8): C09K11/89G11C11/56
Inventor 邹建平郭国聪李艳郭胜平王明盛陈慧芬
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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