不同钙、铬比例的M型铁氧体的吸波性能研究

doi:10.11896/cldb.24060059

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Abstract The rapid development of electronic technology and electronic equipment and wireless communication systems is critical for both the civilian and military sectors. Effectively solving the problem of electromagnetic (EM) radiation pollution generated by it has been given more and more attention at the same time. In this work, M-type calcium-chromium ferrite (Ca_1-xCr_xFe₁₂O₁₉, x=0.1, 0.2, 0.3, 0.4, 0.5) was prepared by sol-gel-self-propagating combustion, and the sample was predicted to be an excellent electromagnetic wave absorbing material. The changes in crystal structure, microstructure and electromagnetic wave absorption characteristics of calcium chromium ferrites with different ion ratios were analyzed. The results show that:under the conditions of pH=7, self-propagating combustion temperature 200 ℃, crystallization temperature 950 ℃ and crystallization time 8 hours, nano-sized hexagonal calcium chromium ferrites with average particle size of 70.273—76.786 nm were successfully prepared. When x=0.2 and the thickness of absorbing layer is 3.5 mm, the reflection loss reaches -17.5 dB at the frequency of 14.6 GHz, and the effective absorption bandwidth extends to 3.75 GHz (12.22—15.62 GHz, 16.12—16.47 GHz). The doping of Ca²⁺ and Cr³⁺ in different proportions affects the grain size and magnetocrystalline anisotropy of ferrite, thus changing the electromagnetic parameters and absorption cha-racteristics of the material. This work broadens the development and application of high performance electromagnetic wave absorber.

Key words： sol-gel-self-propagating combustion method ion ratio magnetite M type absorbing property

Published: Online: 2025-08-28

CLC number:

TD989

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	Articles by authors
	WENG Xingyuan
	QIN Ying
	MA Zhijun
	ZHENG Yunsheng
	LI Zhuomin
	XING Huiling

Cite this article:

WENG Xingyuan,QIN Ying,MA Zhijun, et al. Study on the Absorption Performance of M-type Ferrite Based on Different Ratios of Calcium and Chromium[J]. Materials Reports, 2025, 39(17): 24060059-7.

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https://www.mater-rep.com/EN/10.11896/cldb.24060059 OR https://www.mater-rep.com/EN/Y2025/V39/I17/24060059

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