Preparation method of high-entropy oxide with high solar energy absorptivity and infrared emissivity

A technology of infrared emissivity and solar energy, which is applied in the field of infrared radiation materials and solar energy absorption materials, can solve the problems of long heat preservation time, high cost of raw materials, and many preparation steps, and achieve high production efficiency, stable crystal structure, and simple preparation technology Effect

Active Publication Date: 2021-09-07
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
View PDF7 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solid-phase reaction method used in the above-mentioned literature has a long holding time (20 hours), and needs to be placed on an aluminum plate for air quenching, which has the disadvantages of relatively complicat

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of high-entropy oxide with high solar energy absorptivity and infrared emissivity
  • Preparation method of high-entropy oxide with high solar energy absorptivity and infrared emissivity
  • Preparation method of high-entropy oxide with high solar energy absorptivity and infrared emissivity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh CuO 8.751g (0.11mol), MgO4.433g (0.11mol), Fe 2 o 3 8.783g (0.055mol), Cr 2 o 3 8.359g (0.055mol), Co 3 o 4 8.829g (0.0367mol), TiO 28.789g (0.11mol) powder; according to the mass ratio of ball: material: water 3:1:3, 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 10min, as a ball milling cycle, after 10min, 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 was dried and ground; The ground mixture powder was placed in a box-type resistance furnace, heated to 680 °C in an air atmosphere (heating rate of 12 °C / min), calcined for 2 hours, and then cooled to room temperature by air quenching to obtain a single-phase (Cu, Mg, Fe, Cr, Co, Ti) 3 o 4 High entropy oxides.

[0035] figure 1 As prepared (Cu, Mg, Fe, Cr, Co,...

Embodiment 2

[0042] Weigh CuO8.751g (0.11mol), Co 3 o 4 8.829g (0.0367mol), Fe 2 o 3 8.783g (0.055mol), Cr 2 o 3 8.359g (0.055mol), ZnO8.952g (0.11mol), TiO 2 8.789g (0.11mol) 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 was dried and ground; In a box-type resistance furnace, the temperature was raised to 500°C in an air atmosphere (the heating rate was 10°C / min), calcined for 1 hour, and then cooled to room temperature with the furnace to obtain single-phase (Cu, Co, Fe, Cr, Zn, Ti ) 3 o 4 High entropy oxides.

[0043] Figure 7 As prepared (Cu, Co, Fe, Cr, Zn, Ti) 3 o 4 XR...

Embodiment 3

[0046] Weigh CuO8.751g (0.11mol), MgO4.433g (0.11mol), Fe 2 o 3 8.783g (0.055mol), Cr 2 o 3 8.359g (0.055mol), Co 3 o 4 8.829g (0.0367mol), ZnO8.952g (0.11mol) powder; according to the ball: material: water mass ratio 4:1:3, pour the ball mill beads, raw materials and ultrapure water into the ball mill jar; and place the ball mill jar in the ball mill At the station, ball mill for 1 hour at a speed of 400r / min, and then pause for 10 minutes as a ball milling cycle. After 10 minutes, ball mill for 1 hour at a speed of 400r / min for a total of 9 hours to obtain a mixed powder; The mixed powder was dried and ground; then the mixed powder was placed in a box-type resistance furnace, and the temperature was raised to 780°C in an air atmosphere (the heating rate was 14°C / min), calcined for 4 hours, and then quenched with liquid nitrogen and cooled to room temperature to obtain a single phase (Cu, Mg, Fe, Cr, Co, Zn) 3 o 4 High entropy oxides.

[0047] Figure 8 For prepared ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a preparation method of a high-entropy oxide with high solar energy absorptivity and infrared emissivity, and the method comprises the following steps: taking any six 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, cooling and grinding 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, and 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 oxide has the advantages of single phase, high purity, small particle size, uniform element distribution and high yield; the prepared high-entropy oxide has high solar energy absorptivity and infrared emissivity, has good thermal stability in air, and thus can be used as an infrared radiation material and a solar energy absorption material.

Description

technical field [0001] The invention relates to the preparation of a high-entropy oxide, in particular to a high-entropy oxide with high solar energy absorption rate and infrared emission rate and a preparation method thereof, belonging to the field of infrared radiation materials and solar energy absorption materials. Background technique [0002] High-entropy oxides are an extension of the concept of high-entropy alloys to entropy-stabilized oxides. They are a new type of ceramic material that has attracted extensive attention from domestic researchers because of its simple structure and excellent performance. The key point of high-entropy design is to use four or more cation combinations with equiatomic ratio or near equiatomic ratio. The high entropy of mixing reduces the Gibbs free energy, and its simple structure stabilizes the disordered solid solution phase, overcoming the enthalpy-driven phase separation usually observed in heavily doped. In 2015, Rost et al. prepa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): C04B35/01C04B35/453C04B35/622
CPCC04B35/01C04B35/453C04B35/622C04B2235/3206C04B2235/3241C04B2235/3272C04B2235/3281C04B2235/3232C04B2235/3275C04B2235/6562C04B2235/6567Y02E60/10
Inventor 高祥虎王伟明刘维民刘刚何成玉刘宝华
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap