Modifications of structural, vibrational and dielectric properties in lanthanum substituted U-type hexaferrites for microwave absorption applications.
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| Title: | Modifications of structural, vibrational and dielectric properties in lanthanum substituted U-type hexaferrites for microwave absorption applications. |
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| Authors: | Kousar, Shabana1 (AUTHOR), Khan, Muhammad Azhar1 (AUTHOR) azhar_manais@yahoo.com, Jamil, Asif2 (AUTHOR), Castegnaro, Marcus Vinicius2 (AUTHOR), Alkhaldi, Hanof Dawas3 (AUTHOR), Majeed, Abdul4 (AUTHOR), Mashniwi, Mohsenah H.J.5 (AUTHOR), Mehmood, Ahsan1 (AUTHOR), Boukhris, Imed5 (AUTHOR), Irfan, M.1 (AUTHOR), AL-Anazy, Murefah mana6 (AUTHOR), Akhtar, Majid Niaz1 (AUTHOR) |
| Source: | Ceramics International. Aug2025:Part A, Vol. 51 Issue 20, p30202-30216. 15p. |
| Subjects: | Raman spectroscopy, Fourier transform infrared spectroscopy, Microwave spectroscopy, Dielectric properties, Lattice constants |
| Abstract: | This research aims to investigate Ba 4 Zn 2 La x Fe 36-x O 60 (x = 0.00 ≤ x ≤ 0.075, Δx = 0.025) U-type hexagonal ferrites which were fabricated through sol-gel technique. A Muffle furnace was used to sinter the prepared samples for 5 h at 1200 °C. The single phase of produced samples was verified in the XRD patterns of La3+ substituted U-type hexaferrites. Lattice parameters 'a' and 'c' values vary from 5.786-5.783 and 112.887–113.025. The crystallite size (D) measurement varied between 49 and 45 nm. The porosity (P) of the prepared samples increases, and the bulk density (ρ b) is less than the X-ray density (ρ x). FTIR spectroscopy showed the absorption bands range from 500 to 1100 cm−1. Raman spectroscopy of fabricated materials revealed five different peaks: 416, 471, 531, 617, and 690. The semiconducting nature of fabricated hexagonal ferrite samples was described by UV–visible spectroscopy. All prepared samples showed different dielectric properties between 1.0 MHz and 6.0 GHz frequency ranges. Cole-Cole graphs showed the impact of grain boundaries on prepared materials. At 1.5 GHz, the minimum reflection loss was observed at −53.5 dB for sample x = 0.00. These results demonstrate that samples could be utilized in high-frequency and MW (microwave) applications with suitable cationic substitution. [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 |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 186950940 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Modifications of structural, vibrational and dielectric properties in lanthanum substituted U-type hexaferrites for microwave absorption applications. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Kousar%2C+Shabana%22">Kousar, Shabana</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Khan%2C+Muhammad+Azhar%22">Khan, Muhammad Azhar</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> azhar_manais@yahoo.com</i><br /><searchLink fieldCode="AR" term="%22Jamil%2C+Asif%22">Jamil, Asif</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Castegnaro%2C+Marcus+Vinicius%22">Castegnaro, Marcus Vinicius</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Alkhaldi%2C+Hanof+Dawas%22">Alkhaldi, Hanof Dawas</searchLink><relatesTo>3</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Majeed%2C+Abdul%22">Majeed, Abdul</searchLink><relatesTo>4</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mashniwi%2C+Mohsenah+H%2EJ%2E%22">Mashniwi, Mohsenah H.J.</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mehmood%2C+Ahsan%22">Mehmood, Ahsan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Boukhris%2C+Imed%22">Boukhris, Imed</searchLink><relatesTo>5</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Irfan%2C+M%2E%22">Irfan, M.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22AL-Anazy%2C+Murefah+mana%22">AL-Anazy, Murefah mana</searchLink><relatesTo>6</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Akhtar%2C+Majid+Niaz%22">Akhtar, Majid Niaz</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Ceramics+International%22">Ceramics International</searchLink>. Aug2025:Part A, Vol. 51 Issue 20, p30202-30216. 15p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Raman+spectroscopy%22">Raman spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Fourier+transform+infrared+spectroscopy%22">Fourier transform infrared spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Microwave+spectroscopy%22">Microwave spectroscopy</searchLink><br /><searchLink fieldCode="DE" term="%22Dielectric+properties%22">Dielectric properties</searchLink><br /><searchLink fieldCode="DE" term="%22Lattice+constants%22">Lattice constants</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: This research aims to investigate Ba 4 Zn 2 La x Fe 36-x O 60 (x = 0.00 ≤ x ≤ 0.075, Δx = 0.025) U-type hexagonal ferrites which were fabricated through sol-gel technique. A Muffle furnace was used to sinter the prepared samples for 5 h at 1200 °C. The single phase of produced samples was verified in the XRD patterns of La3+ substituted U-type hexaferrites. Lattice parameters 'a' and 'c' values vary from 5.786-5.783 and 112.887–113.025. The crystallite size (D) measurement varied between 49 and 45 nm. The porosity (P) of the prepared samples increases, and the bulk density (ρ b) is less than the X-ray density (ρ x). FTIR spectroscopy showed the absorption bands range from 500 to 1100 cm−1. Raman spectroscopy of fabricated materials revealed five different peaks: 416, 471, 531, 617, and 690. The semiconducting nature of fabricated hexagonal ferrite samples was described by UV–visible spectroscopy. All prepared samples showed different dielectric properties between 1.0 MHz and 6.0 GHz frequency ranges. Cole-Cole graphs showed the impact of grain boundaries on prepared materials. At 1.5 GHz, the minimum reflection loss was observed at −53.5 dB for sample x = 0.00. These results demonstrate that samples could be utilized in high-frequency and MW (microwave) applications with suitable cationic substitution. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>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.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.ceramint.2025.04.214 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 15 StartPage: 30202 Subjects: – SubjectFull: Raman spectroscopy Type: general – SubjectFull: Fourier transform infrared spectroscopy Type: general – SubjectFull: Microwave spectroscopy Type: general – SubjectFull: Dielectric properties Type: general – SubjectFull: Lattice constants Type: general Titles: – TitleFull: Modifications of structural, vibrational and dielectric properties in lanthanum substituted U-type hexaferrites for microwave absorption applications. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Kousar, Shabana – PersonEntity: Name: NameFull: Khan, Muhammad Azhar – PersonEntity: Name: NameFull: Jamil, Asif – PersonEntity: Name: NameFull: Castegnaro, Marcus Vinicius – PersonEntity: Name: NameFull: Alkhaldi, Hanof Dawas – PersonEntity: Name: NameFull: Majeed, Abdul – PersonEntity: Name: NameFull: Mashniwi, Mohsenah H.J. – PersonEntity: Name: NameFull: Mehmood, Ahsan – PersonEntity: Name: NameFull: Boukhris, Imed – PersonEntity: Name: NameFull: Irfan, M. – PersonEntity: Name: NameFull: AL-Anazy, Murefah mana – PersonEntity: Name: NameFull: Akhtar, Majid Niaz IsPartOfRelationships: – BibEntity: Dates: – D: 07 M: 08 Text: Aug2025:Part A Type: published Y: 2025 Identifiers: – Type: issn-print Value: 02728842 Numbering: – Type: volume Value: 51 – Type: issue Value: 20 Titles: – TitleFull: Ceramics International Type: main |
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