High-emissivity infrared energy-saving material and applications thereof

An energy-saving material and high emissivity technology, applied in luminescent materials, chemical instruments and methods, etc., can solve the problems of low infrared emissivity, long-term stable service, etc., achieve simple preparation process, realize industrialized production, and low production cost Effect

Inactive Publication Date: 2015-10-21
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to overcome the problem that the infrared emissivity of existing infrared energy-saving materials is low or cannot serve stably for a long time in an oxidizing atmosphere at high temperature, and provides a high-emissivity infrared energy-saving material and its application, which realizes the improvement of infrared The target of infrared emissivity of energy-saving materials, and this high-emissivity infrared energy-saving material can serve stably for a long time in an oxidizing atmosphere at high temperature

Method used

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  • High-emissivity infrared energy-saving material and applications thereof
  • High-emissivity infrared energy-saving material and applications thereof
  • High-emissivity infrared energy-saving material and applications thereof

Examples

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Embodiment 1

[0047] Mix and grind lanthanum hydroxide, aluminum oxide, calcium carbonate, and chromium oxide in a molar ratio of 1:1:0.1:0.25, and calcinate the ground mixed raw material powder in an air atmosphere at 1600°C for 360 minutes to cause high-temperature solidification. In contrast, the powder of the high-emissivity infrared energy-saving material is finally prepared. The infrared emissivity of the high-emissivity infrared energy-saving material is 0.95 and the average particle size is 12 μm.

[0048] From figure 1 It can be seen that the phase of the high-emissivity infrared energy-saving material in this embodiment is lanthanum aluminate (LaAlO) with a perovskite structure. 3 ); no other impurity phases were observed, indicating that calcium, chromium and other components have been solid-dissolved into the lattice of lanthanum aluminate, forming a calcium- and chromium-doped lanthanum aluminate-based ceramic material.

[0049] From figure 2 It can be seen that the synthesi...

Embodiment 2

[0053]Mix and grind lanthanum oxide, aluminum oxide, calcium oxide, and chromium oxide in a molar ratio of 1:1:0.01:0.02, and calcinate the ground mixed raw material powder in an air atmosphere at 1200°C for 300 minutes to generate a high-temperature solid phase reaction, and finally prepare the powder of the high-emissivity infrared energy-saving material, the infrared emissivity of the high-emissivity infrared energy-saving material is 0.80, and the average particle size is 3 μm.

Embodiment 3

[0055] Mix and grind lanthanum oxide, aluminum hydroxide, calcium carbonate, and iron oxide in a molar ratio of 1:1:0.25:0.5, and calcinate the ground mixed raw material powder in an air atmosphere at 1400°C for 300 minutes to cause high-temperature solidification. On the contrary, the powder of the high-emissivity infrared energy-saving material is finally prepared. The infrared emissivity of the high-emissivity infrared energy-saving material is 0.92 and the average particle size is 4 μm.

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Abstract

The present invention provides a high-emissivity infrared energy-saving material and applications thereof, and belongs to the technical field of infrared energy-saving materials. According to the high-emissivity infrared energy-saving material, lanthanum aluminate of the perovskite structure is adopted as a main phase, 0.01-0.25 mole of second main group element ions is doped at the unit mole lanthanum site, and 0.02-0.5 mole of transition metal element ions is doped at the unit mole aluminum site; and the high-emissivity infrared energy-saving material is prepared from a lanthanum compound, an aluminum compound, a dopant I and a dopant II, wherein the lanthanum compound is lanthanum oxide, the aluminum compound is aluminum oxide, the dopant I is a mixture comprising one or a plurality of materials selected from magnesium oxide, calcium oxide, strontium oxide and barium oxide, and the dopant II is a mixture comprising one or a plurality of materials selected from chromium oxide, manganese oxide, iron oxide and nickel oxide. According to the present invention, the emissivity of the prepared high-emissivity infrared energy-saving material can be up to 0.95, and the prepared high-emissivity infrared energy-saving material has good high temperature stability.

Description

technical field [0001] The invention relates to the technical field of infrared energy-saving materials, and more specifically relates to a high-emissivity infrared energy-saving material and its application. Background technique [0002] Thermal furnaces are widely used in high-energy-consuming industries such as steel, petrochemicals, cement and refractory materials. According to the statistics of the National Energy Conservation Center, the annual energy consumption of thermal furnaces in my country accounts for more than 20% of the country's total annual energy consumption. However, the average thermal efficiency of thermal furnaces in my country is only 30%, which is far lower than that of thermal furnaces in developed countries, which has reached an average of 50%. Therefore, vigorously improving the thermal efficiency of thermal furnaces is a major problem facing the related industries of thermal furnaces in my country. [0003] Infrared energy-saving materials are a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/44C09K11/80
Inventor 韩召李小伟童碧海韦国静卢卫华
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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