Preparation method of high-entropy oxide with good infrared radiation performance

A technology of infrared radiation and oxide, applied in the field of infrared radiation materials, can solve the problems of high raw material cost, long cycle, uncontrollable, etc.

Inactive Publication Date: 2021-09-14
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The solid phase reaction method used in the above literature has a long holding time (20 hours), and it needs to be placed on an aluminum plate for air quenching, which has the disadvantages of complicated process and long cycle; the spinel type prepared by wet chemical method has high entropy Oxide has the disadvantages of high raw material cost, many preparation steps, complicated and uncontrollable process, etc.

Method used

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  • Preparation method of high-entropy oxide with good infrared radiation performance
  • Preparation method of high-entropy oxide with good infrared radiation performance
  • Preparation method of high-entropy oxide with good infrared radiation performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh CuO11.933g (0.15mol), MnO 2 13.041g (0.15mol), ZnO12.207g (0.15mol), Fe 2 o 3 11.977g (0.075mol) powder; according to the mass ratio of ball: material: water 4:1:3, pour the ball mill beads, raw materials and ultrapure water into the ball mill jar; and place the ball mill jar on the ball mill station for 1 hour Ball milling at a speed of 450r / min, followed by a pause of 10 minutes, as a ball milling cycle, after 10 minutes, ball milling for 1 hour at a speed of 450r / min, and a total of 7 hours of ball milling to obtain a mixed powder; then the mixed powder obtained after ball milling was dried , Put it in a box-type resistance furnace after grinding, heat up to 650°C in air atmosphere (heating rate is 14°C / min), calcined for 7 hours, and then air quenched and cooled to room temperature to obtain single-phase (Cu, Mn, Zn, Fe) 3 o 4 High entropy oxide powder.

[0031] figure 1 For the as-prepared (Cu, Mn, Zn, Fe) 3 o 4 XRD patterns of high-entropy oxides, wh...

Embodiment 2

[0037] Weigh CuO11.933g (0.15mol), MgO6.045g (0.15mol), Cr 2 o 3 11.399g (0.075mol), TiO 2 11.985g (0.15mol) powder; according to the mass ratio of ball: material: water 2:1:3, pour the ball mill beads, raw materials and ultrapure water into the ball mill jar; and place the ball mill jar on the ball mill station for 1 hour Ball milling at a speed of 300r / min, followed by a pause of 10min, as a ball milling cycle, after 10min, ball milling for 1 hour at a speed of 300r / min, and a total of 5 hours of ball milling to obtain a mixed powder; then the mixed powder obtained after ball milling was dried, After grinding, place it in a box-type resistance furnace, heat up to 500°C in air atmosphere (heating rate is 10°C / min), calcinate for 1 hour, and then cool to room temperature with the furnace to obtain single-phase (Cu, Mg, Cr, Ti ) 3 o 4 High entropy oxides.

[0038] Figure 6 For the prepared (Cu, Mg, Cr,Ti) 3 o 4 XRD patterns of high-entropy oxides, which are consistent ...

Embodiment 3

[0041] Weigh CuO11.933g (0.15 mol), Cr 2 o 3 11.399g (0.075mol), Co 3 o 4 12.040g (0.05mol), TiO 2 11.985g (0.15 mol) powder; according to the mass ratio of ball: material: water 4:1:3, pour the ball mill beads, raw materials and ultrapure water into the ball mill jar; Ball milling for 1 hour at a speed of 400r / min, followed by a pause of 10min, as a ball milling cycle, after 10min, ball milling for 1 hour at a speed of 400r / min, and a total of 9 hours of ball milling to obtain a mixed powder; then the mixed powder after ball milling was dried , Put it in a box-type resistance furnace after grinding, heat up to 970°C in air atmosphere (heating rate is 11°C / min), calcinate for 2 hours, and then cool to room temperature with the furnace to obtain single-phase (Cu, Cr, Co, Ti ) 3 o 4 High entropy oxides.

[0042] Figure 7 As prepared (Cu, Cr, Co, Ti) 3 o 4 XRD patterns of high-entropy oxides, which are consistent with Fe with spinel structure in the ICDD database 3 o ...

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Abstract

The invention discloses a preparation method of a high-entropy oxide with good infrared radiation performance, wherein the preparation method comprises the steps: by taking any four of CuO, MnO2, Fe2O3, Cr2O3, Co3O4, TiO2, ZnO and MgO powder as raw materials, carrying out ball-milling mixing, drying and grinding, then carrying out high-temperature calcination in an air atmosphere, and cooling and grinding a product to obtain the high-entropy oxide with a spinel structure. The high-entropy oxide is prepared by combining a mechanical wet grinding method and a solid-phase synthesis method, metal elements can be guaranteed to be sufficiently and uniformly mixed, the method has the advantages of simple preparation technology, high repeatability, high production efficiency, suitability for industrial production and the like, and the prepared high-entropy oxide is single in phase, high in purity, small in particle size, uniform in element distribution, has high infrared emissivity and good thermal stability, and is used as an infrared radiation material in the field of infrared radiation heating and heat dissipation materials.

Description

technical field [0001] The invention relates to a high-entropy oxide, in particular to a high-entropy oxide with good infrared radiation performance and a preparation method thereof, belonging to the field of infrared radiation materials. Background technique [0002] With the development of industrial technology, the contradiction between supply and demand of energy is deepening day by day. Due to the specific performance of infrared ceramics, the application in various aspects of the national economy is growing and developing. As a new type of energy-saving material, infrared radiation material can be coated on the surface of the base material, which can not only achieve a good energy-saving effect, but also have a good protective effect on the base material, which not only prolongs its service life, but also reduces production costs. Therefore, the development of infrared radiation ceramic materials has broad application prospects. [0003] Most high-radiation coatings ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/01C04B35/26C04B35/462C04B35/626
CPCC04B35/265C04B35/462C04B35/01C04B35/62605C04B2235/3281C04B2235/3267C04B2235/3241C04B2235/3232C04B2235/3275C04B2235/3284C04B2235/3206
Inventor 高祥虎王伟明刘维民刘刚刘宝华汪增强
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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