Preparation method for lanthanum-doped barium ferrite-poly-o-methylaniline composite wave-absorbing material

A composite wave absorbing material, barium ferrite technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of high density, high relative magnetic permeability, difficult to prepare wave absorbing materials, etc., and achieve wave absorbing performance good effect
CN102532893AInactive Publication Date: 2012-07-04NANCHANG HANGKONG UNIVERSITY
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NANCHANG HANGKONG UNIVERSITY
Publication Date
2012-07-04
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a preparation method for a lanthanum-doped barium ferrite-poly-o-methylaniline composite wave-absorbing material. According to the method, nitrate and citric acid are used as raw materials, lanthanum-doped barium ferrite (BaLaxFe12-xO19, x is equal to 0.04 to 0.12) is prepared by a sol-gel self-propagating high-temperature synthesis method, and the lanthanum-doped barium ferrite-poly-o-methylaniline composite wave-absorbing material is prepared by an in-situ compounding technology. The material is good in absorption performance, and has wide application prospect in the fields of stealth technologies of military equipment, civil human safety protection, communication interference, electronic information confidentiality and the like.
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Description

technical field

[0001] The invention belongs to the field of preparation of electromagnetic wave absorbing materials, in particular to a method for preparing a lanthanum-doped barium ferrite-poly-o-toluidine composite wave absorbing material. Background technique

[0002] Ferrite absorbing material is a well-studied and relatively mature absorbing material. It has good frequency characteristics, large relative magnetic permeability, and small relative permittivity. It is suitable for making matching layers and has advantages in widening the frequency band at low frequencies. It has good application prospects, but its disadvantage is that the density is too large, it is difficult to prepare light-weight absorbing materials, and the single-component ferrite absorption band is narrow.

[0003] The 4f electrons of rare earth elements are subjected to 5s 2 5p 6 The shielding of the shell, its atoms and ions have electromagnetic properties such as paramagnetic susceptibility, sa...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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