High-emissivity infrared energy-saving material preparation method

A high-emissivity, energy-saving material technology, applied in the field of preparation of high-emissivity infrared energy-saving materials, can solve the problems of long-term stable service, low infrared emissivity, etc., to achieve industrial production, simple preparation process, and huge application potential Effect

Inactive Publication Date: 2015-11-18
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
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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 method for preparing infrared energy-saving materials with high emissivity, which realizes the improvement of infrared energy-saving materials. 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 preparation method

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Embodiment 1

[0048] 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.

[0049] 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.

[0050] From figure 2 It can be seen that the synthesi...

Embodiment 2

[0054] 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

[0056] 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 preparation method, and belongs to the technical field of infrared energy-saving materials. According to the prepared high-emissivity infrared energy-saving material, lanthanum aluminum oxide of the perovskite structure is adopted as the main phase, 0.01-0.25 mole of second main group element ions are doped at the lanthanum position, 0.02-0.5 mole of transition metal element ions are doped at the aluminum position, and the infrared emissivity of the material is 0.80-0.95. The preparation method is a high-temperature solid-phase reaction method, a flame spraying method or liquid-phase synthesis method. Mainly the material of the present invention has the following advantages that the highest emissivity of the infrared energy-saving material achieves 0.95, and the material has a good high temperature stability and has great application potential in the high temperature thermal furnace kiln energy saving field.

Description

technical field [0001] The invention relates to the technical field of infrared energy-saving materials, and more specifically, relates to a method for preparing infrared energy-saving materials with high emissivity. 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 materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/622
Inventor 韩召李小伟童碧海韦国静卢卫华
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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