Barium ferrite composite material and preparation method and application thereof

A technology of composite materials and barium ferrite, applied in chemical instruments and methods, and other chemical processes, can solve problems such as poor dielectric properties and unsatisfactory wave-absorbing properties, and achieve good dielectric properties, easy industrial production, The effect of uniform composition
CN103184033AActive Publication Date: 2013-07-03NINGBO SHANSHAN NEW MATERIAL TECH +1
4 Cites 13 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NINGBO SHANSHAN NEW MATERIAL TECH
Publication Date
2013-07-03

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a preparation method of a barium ferrite composite material, which comprises the following steps: (1) well mixing an aqueous solution containing Ba2+ and an aqueous solution containing Fe3+ to obtain a mixed solution, mixing with citric acid, adjusting the pH value to 6.5-7.5, mixing with nanometer silica powder, dispersing uniformly, volatilizing the solvent to obtain wet gel, wherein the using amount of the nanometer silica powder is 0.5-10 wt% of the mass of the barium ferrite composite material; (2) drying the wet gel, performing self-propagating combustion, removing citric acid to obtain a precursor, calcining the precursor, and cooling to obtain the product. The preparation method of the invention is simple in process, high in precursor calcining activity, and low in calcining temperature; the prepared barium ferrite composite material is uniform in components, good in dielectric properties, good in wave absorption performance in high frequency range, and high in continuous bandwidth below -20 dB.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of microwave absorbing composite materials, in particular to a barium ferrite composite material and its preparation method and application. Background technique

[0002] With the development of science and technology and electronic industry, electromagnetic interference caused by electromagnetic wave radiation has become a new source of pollution; in the face of modern high-tech warfare, wave-absorbing materials play a very critical role in military stealth technology, especially B2 stealth The emergence of bombers and F117 stealth fighters represents a great achievement of this type of material in the military field. Therefore, research on electromagnetic shielding and absorbing materials for absorbing electromagnetic waves has been highly valued and supported worldwide, and is of great significance in the civilian and military fields.

[0003] According to the classification of absorbing loss mechanism, absorbing ...

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
Login to View More