Evolution of hyperfine structure and magnetic characteristic in Fe-Si-Cr alloy with increasing heat treatment temperature

Wang, X.; Li, Junying; Zhang, Nan; Xie, Jianliang; Liang, Difei; Deng, Longjiang

doi:10.1016/j.matdes.2016.02.031

Cited by 21 publications

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References 24 publications

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“…As the temperature of vacuum heat treatment increases, the characteristic peak of Fe 2 O 3 with a value of 35.6° at 2 θ of sample C 20 – C 22 becomes more and more sharp, indicating that the crystallinity of Fe 2 O 3 becomes better and better. The increase in crystallinity is caused by the increase in crystal volume ratio due to the increase in grain size 23 …”

Section: Resultsmentioning

confidence: 99%

“…As the temperature of vacuum heat treatment increases, the characteristic peak of Fe 2 O 3 with a value of 35.6 • at 2θ of sample C 20 -C 22 becomes more and more sharp, indicating that the crystallinity of Fe 2 O 3 becomes better and better. The increase in crystallinity is caused by the increase in crystal volume ratio due to the increase in grain size 23. To observe the oxidation of FeSiCr nanoparticles more intuitively, TEM and High resolution transmission electron microscopy (HRTEM) were used to characterize the morphology of the samples.…”

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Optimization of the microwave absorption properties of FeSiCr@Fe₂O₃ core‐shell nanoparticles by controlling the thickness and crystallinity of Fe₂O₃ shell

et al. 2022

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Fe2O3‐coated FeSiCr(FeSiCr@Fe2O3) nanoparticles were prepared by plasma arc discharge method and oxidation heat treatment process, and the crystallinity of Fe2O3 was improved by vacuum heat treatment. By adjusting the oxidation temperature, Fe2O3 shell layer is formed on the surface of FeSiCr nanoparticles. The thickness of the Fe2O3 shell layer increases with the increase of oxidation temperature. The complex permittivity (εr${\varepsilon _r}$) and complex permeability (μr${\mu _r}$) show a trend of first increasing and then decreasing. When the oxidation temperature is 125°C, the minimum reflection loss (RLmin) of FeSiCr@Fe2O3 nanoparticles is calculated to be −23.7 dB at 11.2 Ghz (d = 2.2 mm). With the increase of the temperature of vacuum heat treatment, the crystallinity of Fe2O3 shell keeps increasing. The real and imaginary values (ε′$\varepsilon ^{\prime}$ and ε′′$\varepsilon ^{\prime\prime}$) of the complex permittivity of FeSiCr@Fe2O3 nanoparticle increase with the increase of the crystallinity of Fe2O3 shell, and the μr${\mu _r}$ basically remains unchanged. When the vacuum heat treatment temperature is 150°C, the FeSiCr@Fe2O3 nanoparticle obtains RLmin of −49.9 dB at 15.9 Ghz (d = 1.7 mm). And the corresponding effective absorption bandwidth within 1‐18 GHz (RL ≤ −10 dB) is 5.9 GHz. The improved microwave performance is due to the interface polarization of the core‐shell structure, and the synergistic effect between FeSiCr and Fe2O3 also helps to balance the electromagnetic parameters.

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confidence: 99%

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Optimization of the microwave absorption properties of FeSiCr@Fe₂O₃ core‐shell nanoparticles by controlling the thickness and crystallinity of Fe₂O₃ shell

et al. 2022

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The enhanced magnetic properties of FeSiCr powder cores composited with carbonyl iron powder

Gong

Dong

Huang

et al. 2021

J Mater Sci: Mater Electron

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Phase Equilibria of the Fe-Si-Cr-Al Quaternary System at 800 °C

Chen

Yang

Yan

et al. 2021

J. Phase Equilib. Diffus.

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Evolution of hyperfine structure and magnetic characteristic in Fe-Si-Cr alloy with increasing heat treatment temperature

Cited by 21 publications

References 24 publications

Optimization of the microwave absorption properties of FeSiCr@Fe₂O₃ core‐shell nanoparticles by controlling the thickness and crystallinity of Fe₂O₃ shell

Optimization of the microwave absorption properties of FeSiCr@Fe₂O₃ core‐shell nanoparticles by controlling the thickness and crystallinity of Fe₂O₃ shell

The enhanced magnetic properties of FeSiCr powder cores composited with carbonyl iron powder

Phase Equilibria of the Fe-Si-Cr-Al Quaternary System at 800 °C

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Evolution of hyperfine structure and magnetic characteristic in Fe-Si-Cr alloy with increasing heat treatment temperature

Cited by 21 publications

References 24 publications

Optimization of the microwave absorption properties of FeSiCr@Fe2O3 core‐shell nanoparticles by controlling the thickness and crystallinity of Fe2O3 shell

Optimization of the microwave absorption properties of FeSiCr@Fe2O3 core‐shell nanoparticles by controlling the thickness and crystallinity of Fe2O3 shell

The enhanced magnetic properties of FeSiCr powder cores composited with carbonyl iron powder

Phase Equilibria of the Fe-Si-Cr-Al Quaternary System at 800 °C

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Product

Resources

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Optimization of the microwave absorption properties of FeSiCr@Fe₂O₃ core‐shell nanoparticles by controlling the thickness and crystallinity of Fe₂O₃ shell

Optimization of the microwave absorption properties of FeSiCr@Fe₂O₃ core‐shell nanoparticles by controlling the thickness and crystallinity of Fe₂O₃ shell