A kind of manganese series inverse spinel phase high emissivity infrared pigment and preparation method thereof

Abstract

The invention belongs to the technical field of infrared materials and discloses a manganese system inverse spinel phase high-emissivity infrared pigment and a preparing method thereof. The method comprises the following steps: 1, mixing electrolyzed MnO2 and Co2O3 and obtaining a mixture; 2, placing the mixture in a saggar, sealing, placing in a microwave sintering furnace to carry out microwave heating, stopping microwaves, preserving heat, discharging and obtaining a powdery product; 3, mixing the powdery product, the electrolyzed MnO2, a nickel source, a copper source, a ferrous source, a zinc source and water and obtaining a blend; 4, placing the blend in a heat preserving device, sealing, placing in the microwave device, carrying out microwave heating, stopping microwaves, preserving heat, discharging and obtaining the high-emissivity infrared pigment; and 5, or, placing the blend in the heat preserving device, sealing, placing in the microwave device, carrying out microwave heating, stopping microwaves, quenching and obtaining the infrared pigment. The particles of the infrared pigment are even and fine, and the infrared performance is excellent.

Description

technical field [0001] The invention belongs to the technical field of infrared materials, and in particular relates to a manganese-based inverse spinel phase high-emissivity infrared pigment and a preparation method thereof. Background technique [0002] At present, when preparing infrared pigments with spinel as the main crystal phase, people mainly use liquid phase methods and solid phase methods. The crystal grains of spinel phase infrared pigments synthesized by liquid phase methods are often relatively small and uniform. The grain crystallization is regular, but its operation is complicated and the output is low. The traditional solid-phase method is used for synthesis, the process is simple and the cost is low, but the material synthesized by the solid-state method is prone to abnormal growth of the crystal phase during the sintering process, and the grain The growth of the pigment is not easy to control, which affects the infrared performance of the pigment to a cert...

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Problems solved by technology

In summary, many scholars have confirmed that although the infrared material of the spinel phase synthesized by the transition metal oxide has good infrared performance, its synthesis time is long and energy consumption is large.

So far, there is also a related patent (ZL201210445781.6) that mentions the use of microwave technology to rapidly synthesize infrared materials in the spinel phase, which uses Fe 2 o 3 , MnO 2 、Co 2 o 3 , CuO as the raw material, and directly carry out microwave action after mechanical mixing, and finally obtain an iron-based spinel phase material. Although the spinel phase material can be synthesized quickly by microwave, the synthesis rate is often not high, and the short-term It is conducive to the doping of transition metals. If continuous microwave action is used for heat preservation, the iron-based spinel phase structure formed has good wave-absorbing properties, which will make the temperature of the material continue to rise, the material will be over-burned, and the grains will grow abnormally. Affects the infrared properties of the material, so its infrared emissivity in the near-infrared band is only 0.83-0.85

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