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Different Stages of...
Different Stages of Phase Transformation in the Synthesis of Nanocrystalline Sr-Hexaferrite Powder Prepared by a Gaseous Heat Treatment and Re-Calcination Method
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- Dehghan, Ramin (författare)
- Univ Tehran, Adv Magnet Mat Res Ctr, Sch Met & Mat, Tehran 111554563, Iran.
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- Ebrahimi, Seyyed Ali Seyyed (författare)
- Univ Tehran, Adv Magnet Mat Res Ctr, Sch Met & Mat, Tehran 111554563, Iran.
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- Lalegani, Zahra (författare)
- Univ Tehran, Adv Magnet Mat Res Ctr, Sch Met & Mat, Tehran 111554563, Iran.
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- Hamawandi, Bejan, PhD (författare)
- KTH,Biomedicinsk fysik och röntgenfysik
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Univ Tehran, Adv Magnet Mat Res Ctr, Sch Met & Mat, Tehran 111554563, Iran Biomedicinsk fysik och röntgenfysik (creator_code:org_t)
- 2022-10-22
- 2022
- Engelska.
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Ingår i: Nanomaterials. - : MDPI AG. - 2079-4991. ; 12:21
- Relaterad länk:
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https://doi.org/10.3...
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https://urn.kb.se/re...
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https://doi.org/10.3...
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Abstract
Ämnesord
Stäng
- In this paper, the phase transformation in a gaseous heat treatment and re-calcination (GTR) process for preparing nanocrystalline Sr-hexaferrite powder using methane (CH4) was studied. The process included gaseous heat treatment and subsequent re-calcination. Phase composition of the powder and its physical properties were changed significantly owing to formation of different intermediate phases. Sr-hexaferrite powder was prepared by the conventional route as the precursor. The results were represented in a phase transformation map that showed the intermediate phases and clarified the transformation path during the process. As evidenced by the map, the process had four general stages: decomposition of hexaferrite, reduction of iron oxides to pure iron, re-oxidation of iron, and re-formation of hexaferrite with different properties and structure.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Materialteknik -- Annan materialteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Materials Engineering -- Other Materials Engineering (hsv//eng)
Nyckelord
- strontium hexaferrite
- GTR mechanism
- phase transformation
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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