Preparation method of halloysite-based soft magnetic ferrite wave absorbing material

Abstract

The invention discloses a preparation method of a halloysite-based soft magnetic ferrite wave absorbing material. The preparation method comprises the following steps: S1, after using ferrous chloride, nickel chloride, aluminum chloride and magnesium chloride as main materials, adding hydrochloric acid, and dissolving the main materials, then adding barium oxide, cerium oxide, titanium oxide and vanadium oxide, and stirring until completely dissolving, thus obtaining a material 1; S2, adding halloysite into an ionic solution, carrying out ultrasonic dispersion, adding the material 1, and uniformly mixing, thus obtaining a material 2; S3, uniformly mixing ammonium hydroxide, 1,3-propane diamine and triethanolamine according to a volume ratio that ammonium hydroxide to 1,3-propane diamine to triethanolamine is (3 to 5) to (1 to 2) to (2 to 3), thus obtaining a mixed alkaline solution; S4, dropwise adding the mixed alkaline solution into the material 2, continuously stirring during a dropwise adding process, rising the temperature to 50 to 70 DEG C after completely finishing dropwise adding, standing and keeping warm, filtering after cooling, and drying, thus obtaining a material 3; S5, carrying out microwave sintering on the material 3 in nitrogen gas, and cooling, wherein nitrogen gas partial pressure and the sintering temperature meet a following relation expression: 1gPnitrogen gas equals to k-1454 / (T+273). According to the preparation method disclosed by the invention, the wave absorbing performance of a ferrite material is increased, the density is small, the weight is light, and actual using requirements are met.

Description

technical field [0001] The invention relates to the technical field of soft ferrite wave-absorbing materials, in particular to a preparation method of halloysite-based soft-ferrite wave-absorbing materials. Background technique [0002] The rapid development of microwave information technology and the widespread use of microwave devices have made the problem of electromagnetic radiation and electromagnetic interference between devices more and more serious. To solve these problems, wave-absorbing materials can be used to absorb unwanted electromagnetic waves. In addition to civilian use, absorbing materials are also widely used in radar wave stealth coatings for national defense weapons and equipment such as aircraft, tanks, and ships. The development goal of absorbing materials is "thin, light, wide, and strong", that is, the absorbing coating (or patch) is required to be thin, light in weight, wide in absorbing frequency, and strong in absorbing performance, and continue ...

AI Technical Summary

Problems solved by technology

However, the currently commercially available soft ferrite absorbing materials have a high density, which cannot meet the requirements of lightness and thinness, and the preparation process is relatively complicated, the requirements for operators are high, and the production cost is high.