Preparation method of nonlinear CsPbX3 nanocrystalline glass

A nanocrystalline, nonlinear technology, applied in the field of nonlinear optics, can solve the problem of nonlinear refractive index to be improved, and achieve the effect of convenient synthesis method, strong stability, and convenient transportation

Active Publication Date: 2020-11-03
WENZHOU UNIVERSITY
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  • Abstract
  • Description
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Problems solved by technology

But its nonlinear refractive index needs to be improved

Method used

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  • Preparation method of nonlinear CsPbX3 nanocrystalline glass
  • Preparation method of nonlinear CsPbX3 nanocrystalline glass
  • Preparation method of nonlinear CsPbX3 nanocrystalline glass

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Experimental program
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Effect test

Embodiment 1

[0055] Table 1: Raw material formula (mol%) of glass

[0056]

[0057] First, weigh according to the molar percentages of the raw materials shown in Table 1, mix them well, put them in a muffle furnace, raise them from room temperature to 1280°C in 150 minutes, and keep them warm for 30 minutes. The molten glass is then poured onto a 350°C grinder. Then put it into an annealing furnace at 360°C for 200 minutes to eliminate internal stress. After naturally cooling to room temperature, the slices were polished and then heat-treated at 470°C for 10 hours. After the temperature dropped to room temperature, the glass was cut into small circular pieces with a diameter of 1.5nm and a thickness of 0.8mm and polished on both sides, and then the obtained nanocrystalline glass was subjected to structural analysis related tests.

Embodiment 2

[0059] Referring to Example 1, the difference is that the heat treatment condition is: heat treatment at 500° C. for 10 h.

Embodiment 3

[0061] Referring to Example 1, the difference is that the heat treatment condition is: heat treatment at 530° C. for 10 h.

[0062] The ClBrA that embodiment 1-3 prepares, the X-ray diffraction pattern of ClBrB and CPB glass is as figure 1 (a) shown. By changing the ratio of Cl and Br, the corresponding diffraction peaks will slowly shift to higher angles following Vegard's law. Obviously, all the diffraction peaks of CPBNCs glass can be compared with CsPbBr 3 (PDF #54-0752), in addition, the diffraction peaks become clearer when the heat treatment temperature is gradually increased. The results show that increasing the heat treatment temperature leads to better crystallinity. However, too high heat treatment temperature will lead to concentration quenching, the photo of the corresponding sample is shown in figure 1 (b) shown. exist figure 2 (a)-(d) and image 3 In (a)–(c), transmission electron microscopy (TEM) analysis confirmed that the perovskite nanocrystals were ...

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Abstract

The invention discloses a preparation method of nonlinear CsPbX3 nanocrystalline glass. The preparation method comprises the following steps: (1) weighing the following raw materials in parts by weight: 20-50 parts of B2O3; 2-10 parts of ZnO; 5-50 parts of SiO2; 1-10 parts of Al2O3; 1-10 parts of MgO; 3-40 parts of Cs2CO3; and 9-45 parts of PbCl2 + PbBr2 + PbI2 + NaCl + NaBr + NaI, wherein the amounts of PbCl2, PbBr2 and PbI2 are all not 0 or one of the amounts of PbCl2, the PbBr2 and the PbI2 is 0, or two of the amounts of the PbCl2, the PbBr2 and the PbI2 are 0; when the amount of PbX2 is not 0, the formula should satisfy the molar ratio of PbX2:NaX = 1:2; (2) putting the raw materials into a muffle furnace for high-temperature melting, pouring the molten glass into a preheated mold after the glass is formed, and putting the mold into an annealing furnace for annealing treatment after the glass is formed; and then carrying out crystallization heat treatment in a heat preservation furnace to separate out crystal phases with nano-scale sizes and uniform distribution in the glass, and then cooling the semiproduct to obtain the CsPbX3 nanocrystalline glass. The CsPbX3 nanocrystallineglass prepared by the method provided by the invention has a high nonlinear refractive index.

Description

[0001] (1) Technical field [0002] The invention belongs to the field of nonlinear optics, in particular to a CsPbX 3 (X=Cl, Br, I) preparation method of nanocrystalline glass. [0003] (2) Background technology [0004] High nonlinear refractive index is of great significance for the application of new laser protectors. Nowadays, the rapid progress of laser technology and even the advent of laser weapons have brought urgent needs for laser protection. The development of broadband, high-transmission, and tunable new laser protectors has become a research hotspot in recent years. At present, it mainly focuses on materials with nonlinear optical limiting effect. In principle, materials with nonlinear optical limiting effects include single type (materials with only one nonlinear optical effect) and compound type (materials with two or more nonlinear optical effects). The advent of perovskite materials will bring new possibilities to optical limiting materials. [Song Yinglin,...

Claims

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Application Information

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IPC IPC(8): C03C10/16C03B5/16C03B25/00
CPCC03C10/16C03B5/16C03B25/00
Inventor 金梦菲菲梁晓娟向卫东
Owner WENZHOU UNIVERSITY
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