View in EDS

Structural, spectral, elemental, reflection loss, and dielectric multifunctional features of Sr Ni-based U-type hexagonal ferrite nanomaterials for microwave absorption applications.

Saved in:
Bibliographic Details
Title: Structural, spectral, elemental, reflection loss, and dielectric multifunctional features of Sr Ni-based U-type hexagonal ferrite nanomaterials for microwave absorption applications.
Authors: Mehmood, Ahsan1 (AUTHOR) ahsan.0mehmood@gmail.com, Khan, Muhammad Azhar1 (AUTHOR) azhar.khan@iub.edu.pk, Gulbadan, Shagufta1 (AUTHOR), Alresheedi, Nadi Mlihan2 (AUTHOR), Ashraf, Ghulam Abbas3 (AUTHOR), Almashnowi, Majed Y.4 (AUTHOR), Irfan, M.1 (AUTHOR), Ali, H. Elhosiny5 (AUTHOR), Javed, Zeshan6 (AUTHOR), Al-Buriahi, M.S.7 (AUTHOR), Alshahrani, Thamraa8 (AUTHOR), Akhtar, Majid Niaz1 (AUTHOR)
Source: Ceramics International. Jul2025, Vol. 51 Issue 17, p24171-24183. 13p.
Subjects: Lattice constants, Dielectric properties, Fourier transform infrared spectroscopy, X-ray diffraction, Permittivity
Abstract: Sol-gel auto-combustion technique has been utilized to synthesize Lanthanum (La3+) substituted Sr 4 Ni 2 La x Fe 36-x O 60 (0.00 ≤ x ≤ 0.09 and Δx = 0.03) U-type hexaferrites. X-ray diffraction studies confirmed the single-phase nature the of fabricated materials. The lattice constant "a" was determined to be 5.75 Å, while the lattice constant "c" varied from 112.273 to 112.713 Å with the substitution of La3+ cations. The XRD data analysis revealed the crystalline size ranging from 49 to 73 nm. The microstrain was improved by substituting La3+ in these U-type hexaferrites. FTIR spectroscopy evidenced stretching vibrational peaks in the region (400-600 cm−1), confirming the spectral bands of these hexaferrites. The presence of every metal cation in its specified valence state was evaluated using XPS analysis. Dielectric parameters, including loss factor, dielectric constant, Q-value, reflection loss, and tan loss, have been optimized by these substitutions of La in the hexaferrites. The maximum microwave absorption was achieved with a reflection loss (RL) of −46 dB at 4.5 GHz for x = 0.09. The comparatively smaller reflection loss (−46 dB) makes this composition ideal for microwave absorption applications. [ABSTRACT FROM AUTHOR]
Copyright of Ceramics International is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:Sol-gel auto-combustion technique has been utilized to synthesize Lanthanum (La3+) substituted Sr 4 Ni 2 La x Fe 36-x O 60 (0.00 ≤ x ≤ 0.09 and Δx = 0.03) U-type hexaferrites. X-ray diffraction studies confirmed the single-phase nature the of fabricated materials. The lattice constant "a" was determined to be 5.75 Å, while the lattice constant "c" varied from 112.273 to 112.713 Å with the substitution of La3+ cations. The XRD data analysis revealed the crystalline size ranging from 49 to 73 nm. The microstrain was improved by substituting La3+ in these U-type hexaferrites. FTIR spectroscopy evidenced stretching vibrational peaks in the region (400-600 cm−1), confirming the spectral bands of these hexaferrites. The presence of every metal cation in its specified valence state was evaluated using XPS analysis. Dielectric parameters, including loss factor, dielectric constant, Q-value, reflection loss, and tan loss, have been optimized by these substitutions of La in the hexaferrites. The maximum microwave absorption was achieved with a reflection loss (RL) of −46 dB at 4.5 GHz for x = 0.09. The comparatively smaller reflection loss (−46 dB) makes this composition ideal for microwave absorption applications. [ABSTRACT FROM AUTHOR]
ISSN:02728842
DOI:10.1016/j.ceramint.2025.03.102