High-temperature high-pressure preparation method of zinc selenide polycrystalline bulk material

A high temperature and high pressure, zinc selenide technology, applied in the direction of polycrystalline material growth, chemical instruments and methods, crystal growth, etc., to achieve the effect of shortening the preparation cycle and sintering time, simple process flow, and optimizing optical properties

Inactive Publication Date: 2018-08-03
MUDANJIANG NORMAL UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Direct use of elemental elements, using high temperature and high pressure me...

Method used

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  • High-temperature high-pressure preparation method of zinc selenide polycrystalline bulk material
  • High-temperature high-pressure preparation method of zinc selenide polycrystalline bulk material
  • High-temperature high-pressure preparation method of zinc selenide polycrystalline bulk material

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Fully mix the analytically pure selenium powder (Se) with a particle size of 1 to 5 microns and the zinc powder (Zn) with a particle size of 1 to 5 microns at a molar ratio of 1:1, use a hydraulic press to form the powder, and then put the sample into the synthesis chamber ;The graphite heat pipe is used in the assembly chamber, pyrophyllite is used as the insulation material, and hexagonal boron nitride is used to protect the chamber. The synthesis pressure is 3.0GPa, the synthesis temperature is 1300K, and the heat preservation and pressure holding time is 15 minutes. After the heating is stopped, the sample is naturally cooled to After decompression at room temperature, the specific X-ray diffraction results of zinc selenide prepared under this condition are shown in figure 1 , the transmission energy spectrum results are shown in Figure 6 .

Embodiment 2

[0030] Using the same raw materials as in Example 1, mixed according to the molar ratio of 1: 1, the powder sample was compressed and formed using the same assembly as in Example 1, the synthesis pressure was 3.0GPa, the synthesis temperature was 1300K, and the pressure holding time was 30 minutes. After the heating was stopped, the sample was naturally cooled to room temperature and then the pressure was released. Under this condition, pure phase zinc selenide was prepared. Combining the above two examples, it can be known that increasing the time can improve the crystallinity of zinc selenide. For specific X-ray diffraction results, see figure 2 , the transmission energy spectrum results are shown in Figure 7 .

Embodiment 3

[0032] Using the same raw materials as in Example 1, mixed according to the molar ratio of 1:1, the powder sample was pressed and formed using the same assembly as in Example 1, the synthesis pressure was 3.0GPa, the synthesis temperature was 1500K, and the holding time was 30 minutes. After the heating was stopped, the sample was naturally cooled to room temperature and then the pressure was released. Under this condition, zinc selenide with higher purity was synthesized. For specific X-ray diffraction results, see image 3 , the transmission energy spectrum results are shown in Figure 8 .

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Abstract

The invention provides a high-temperature high-pressure preparation method of a zinc selenide polycrystalline bulk material. According to the method, two kinds of elementary substances of selenium (Se) powder and zinc (Zn) powder are used as raw materials; through the technological processes of raw material mixing, briquetting, assembling, high-temperature high-pressure pressing and cooling pressure release, a molybdenum tungsten bicarbonate bulk material is prepared. A zinc selenide optical material with high purity and high transmission rate is prepared by a high-temperature high-pressure synthesis method; the material ingredient and purity of zinc selenide are regulated by optimizing the mass proportion and regulating the synthesis temperature and pressure; the high-purity bulk zinc selenide optical material is prepared. The technological process is simple; zinc oxides and sulfides do not need to be used as raw materials; the zinc selenide purity is improved by regulating the simplesubstance raw material proportion, temperature and pressure; the bulk zinc selenide material with high purity is prepared. In addition, the preparation period and the sintering time of a traditionalhot pressing sintering method are greatly shortened; the synthetized bulk material is favorable for optimizing the optical performance.

Description

technical field [0001] The invention relates to a modification method of a positive electrode material of a lithium ion battery, in particular to a high-temperature and high-pressure preparation method of a zinc selenide polycrystalline bulk material. Background technique [0002] Zinc selenide material is a II-VI semiconductor light-emitting matrix material with excellent performance, wide energy band gap, high refractive index, high light transmittance, etc. It is widely used in physics, optics, sensors, optoelectronic materials and other fields. The intrinsic emission of ZnSe is in the blue or green light region, especially in the visible light range, it has excellent photocatalytic and photoelectric conversion activity, as well as good transmission performance and stable refraction performance, making ZnSe one of the ideal materials for manufacturing optoelectronic devices. one. Zinc selenide materials have irreplaceable advantages in traditional optoelectronic applicat...

Claims

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Application Information

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IPC IPC(8): C01B19/00C30B29/48
CPCC01B19/007C01P2002/72C01P2004/04C01P2006/60C01P2006/80C30B29/48
Inventor 王方标王丽娟黄海亮姜宏伟郑友进
Owner MUDANJIANG NORMAL UNIV
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