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High-emissivity infrared energy-saving high-entropy material with perovskite structure and preparation method thereof

A perovskite structure, high emissivity technology, applied in chemical instruments and methods, sustainable manufacturing/processing, inorganic chemistry, etc. It can solve problems such as inter-particle scattering, and achieve the effects of reducing the mean free path, enhancing nonlinear vibration, and simplifying the preparation process.

Pending Publication Date: 2021-07-23
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mutual doping of elements of different atomic mass and atomic radius in the lattice of high-entropy materials enhances the nonlinear vibration of the lattice, thereby reducing the mean free path of phonons, further aggravating the scattering effect between phonons, and resulting in thermal conductivity lower

Method used

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  • High-emissivity infrared energy-saving high-entropy material with perovskite structure and preparation method thereof
  • High-emissivity infrared energy-saving high-entropy material with perovskite structure and preparation method thereof

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Effect test

Embodiment 1

[0023] Embodiment 1: Carry out batching according to molar ratio La:Cr:Mn:Fe:Co:Ni=1:0.2:0.2:0.2:0.2:0.2 with lanthanum oxide, cobalt oxide, chromium oxide, iron oxide, manganese oxide, nickel oxide and ball milled for 6 h, dried and calcined in an air atmosphere at 1200 °C for 300 min to cause a high-temperature solid-state reaction to occur, and finally a high-emissivity infrared energy-saving high-entropy material with a perovskite structure was prepared. An entropic material has an emissivity of 0.95.

[0024] From figure 1 It can be seen that the diffraction peaks of the high-emissivity infrared energy-saving high-entropy material synthesized in this implementation case are located between the five single components, and almost completely coincide with the diffraction peaks of LaMnO3, and the diffraction peaks are broadened at the same time, indicating that the five elements Solid solution in the crystal lattice is good, the high configuration entropy formed by equimolar...

Embodiment 2

[0026] Embodiment 2: Carry out batching according to molar ratio La:Cr:Mn:Fe:Co:Ni=1:0.2:0.2:0.2:0.2:0.2 with lanthanum oxide, cobalt oxide, chromium oxide, iron oxide, manganese oxide, nickel oxide and ball milled for 24 h, dried and calcined in an air atmosphere at 1400 °C for 360 min to allow a high-temperature solid-state reaction to occur, and finally a high-emissivity infrared energy-saving high-entropy material with a perovskite structure was prepared. The emissivity of entropic materials is 0.91.

Embodiment 3

[0027] Embodiment 3: Carry out batching according to molar ratio La:Cr:Mn:Fe:Co:Ni=1:0.2:0.2:0.2:0.2:0.2 with lanthanum oxide, cobalt oxide, chromium oxide, iron oxide, manganese oxide, nickel oxide and ball milled for 24 h, dried and calcined in an air atmosphere at 1500 °C for 120 min to allow a high-temperature solid-state reaction to occur, and finally a high-emissivity infrared energy-saving high-entropy material with a perovskite structure was prepared. The emissivity of entropic materials is 0.89.

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Abstract

The invention provides a preparation method of a high-emissivity infrared energy-saving high-entropy material with a perovskite structure, and belongs to the technical field of infrared energy saving. According to the prepared high-emissivity infrared energy-saving high-entropy material with the perovskite structure, the perovskite structure (ABO3 structure) is used as a main phase, the A site is the La element, and the B site is three to five metal elements of Co, Cr, Fe, Mn, Ni and Al. The emissivity of the material ranges from 0.85 to 0.95. The preparation method is a high-temperature solid-phase synthesis method. The high-emissivity infrared energy-saving high-entropy material with the perovskite structure has the beneficial effects that the emissivity is up to 0.95, the thermal conductivity is low, the high-temperature stability is good, and the high-emissivity infrared energy-saving high-entropy material has huge potential in the field of energy conservation of thermotechnical kilns.

Description

technical field [0001] The invention belongs to the technical field of infrared energy saving, and more specifically relates to a high-emissivity infrared energy-saving high-entropy material with a perovskite structure and a preparation method thereof. Background technique [0002] In recent years, various high-entropy ceramics, such as oxides, carbides, borides, nitrides, and silicides, have been studied along with their structures and properties. Among these crystalline high-entropy ceramics, high-entropy oxides, such as rock salt, spinel, perovskite, and fluorite, have attracted great research interest due to their application potential. Perovskite type (ABO 3 Structure) The crystal structure of oxides generally consists of 12-coordinated A-site atoms, 6-coordinated B-site atoms, and oxygen octahedra. Due to the large number of coordination numbers at the A and B sites, there will be more different combinations of cations, and there will be different sizes of A and B si...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00
CPCC01G53/006C01P2002/34C01P2002/72C01P2002/82Y02P20/10
Inventor 王刚王曲张琪张一帆杜鹏辉梁鹏鹏王来稳
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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