Preparation method of high-entropy ceramic material with good light absorption performance

A ceramic material and light absorption technology, applied in the field of solar energy absorption materials and high entropy ceramic materials, can solve the problems of complex process, complex process, uncontrollable and so on

Active Publication Date: 2021-09-10
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 in the above-mentioned literature uses a long holding time (20 hours), and needs to be placed on an aluminum plate for air quenching, which has the disadvantages of relatively complicated process and long cycle; the wet chemical method prepares spinel-type high-entropy oxidation However, there are disadvantages such as high cost of raw materials, many preparation steps, complicated and uncontrollable process, etc.

Method used

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  • Preparation method of high-entropy ceramic material with good light absorption performance
  • Preparation method of high-entropy ceramic material with good light absorption performance
  • Preparation method of high-entropy ceramic material with good light absorption performance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Weigh CuO9.546g (0.12mol), MgO5.239g (0.12mol), Fe 2 O 3 9.581g (0.06mol), ZnO10.579g (0.12mol), TiO 210.387g (0.12mol) powder; sphere: material: water mass ratio of 3: 1: 3 The milling beads, raw materials and ultra pure water was poured into a ball mill jar; ball mill jar and placed on a ball mill station, for a first hours of milling, speed of 450r / min, 10min pause then, as a period of a ball mill, a ball mill for 1 hour and then over 10min, speed of 450r / min, a total of 7 hours to give a mixed powder milling; ball milling the resultant mixed powder was dried, milled and then placed in box resistance furnace, heated air atmosphere to 780 deg.] C (heating rate of 12 ℃ / min) calcined for 2 hours, and then air quenching to room temperature after calcination, to obtain single-phase (Cu, Mg, Fe, Zn , Ti) 3 O 4 Ceramic high entropy.

[0034] figure 1 Is (Cu, Mg, Fe, Zn, Ti) prepared 3 O 4 High entropy XRD pattern ceramic oxide material, the ICDD database spectrum and Fe ...

Embodiment 2

[0041] Weigh CuO9.546g (0.12mol), MgO5.239g (0.12mol), Fe 2 O 3 9.581g (0.12mol), Cr 2 O 3 9.119 g (0.06mol), Co 3 O 4 9.632g (0.04mol) powder; sphere: material: water mass ratio of 2: 1: 3 The milling beads, raw materials, ultra-pure water was poured into a ball mill jar, and placed on a ball mill pot station, for a first hours of milling, speed of 300r / min, 10min pause then, as a period of a ball mill, a ball mill for 1 hour and then over 10min, speed of 300r / min, a total mixed powder was ball milled for 5 hours; followed by ball milling the mixed powder obtained was dried grinding; then placed in box resistance furnace in air atmosphere heated to 500 deg.] C (heating rate of 10 ℃ / min) was calcined for 1 hour and cooled to room temperature and finally quenched in liquid nitrogen, to obtain single-phase (Cu, Mg, Fe , Cr, Co) 3 O 4 Ceramic high entropy.

[0042] Figure 7 Is the (Cu, Mg, Fe, Cr, Co) 3 O 4 Ceramic high entropy XRD pattern of the spectrum and Fe ICDD database ...

Embodiment 3

[0045] Weigh CuO10.342 g (0.13mol), MnO 2 13.041g (0.13mol), Cr 2 O 3 9.879g (0.065mol), Co 3 O 4 9.632g (0.043mol), ZnO10.579g (0.13mol) powder; sphere: material: water mass ratio of 4: 1: 3 The milling beads, raw materials and ultra pure water was poured into a ball mill jar; and placed in a jar mill station on a ball mill, a ball mill for 1 hour before, the rotation speed of 400r / min, 10min pause then, as a period of a ball mill, a ball mill for 1 hour again after 10min, the rotational speed of 400r / min, in total powder mixture ball milled for 9 hours; the resulting mixture is then ball-milled powder was dried, milled; then placed in box resistance furnace heated to 1140. deg.] C in an air atmosphere (heating rate 12 ℃ / min), calcined for 9 hours and finally cooled to room temperature with the furnace, single phase the (Cu, Mn, Cr, Co, Zn) 3 O 4 Ceramic high entropy.

[0046] Figure 8 The preparation of the (Cu, Mn, Cr, Co, Zn) 3 O 4 Ceramic high entropy XRD pattern of th...

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Abstract

The invention discloses a preparation method of a high-entropy ceramic material with good light absorption performance, the preparation method comprises the following steps: taking any five 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 then cooling and grinding to obtain high-entropy ceramic with a spinel structure. The high-entropy ceramic is prepared by combining a mechanical wet grinding method and a solid-phase synthesis method, metal elements can 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 ceramic is single in phase, high in purity, small in particle size and uniform in element distribution, the material has high solar energy absorptivity and good thermal stability, and can ensure the photo-thermal conversion efficiency of a solar energy absorbing material as a solar energy absorbent.

Description

Technical field [0001] The present invention relates to the preparation of a ceramic material of high entropy, in particular, relates to a method for preparing high entropy ceramic and good light-absorbing properties can be used as solar energy absorbing material, belonging to the field of ceramic materials and high entropy art solar energy absorbing material. Background technique [0002] Three yuan spinel-type metal oxide has unique catalytic properties and electrical properties, is often used as electrocatalytic material, its use in the photothermal conversion of solar has attracted attention. For example, spinel-type CuFeMnO 4 Black powder was used as a light absorption spectrum of a pigment selectively absorbing solar coatings. However, in CuFeMnO 4 During the preparation of components susceptible to segregation as Fe 2 O 3 The reddish-brown belt, thus affecting the absorption of sunlight. To overcome this problem researchers instead of Fe with Co. Preparation CoCuMnO x The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/453C04B35/01C04B35/622
CPCC04B35/453C04B35/01C04B35/622C04B2235/3281C04B2235/3232C04B2235/3206C04B2235/3241C04B2235/6562C04B2235/6567
Inventor 高祥虎王伟明刘刚何成玉刘宝华赵士杰
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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