Mehmet Ali Recai ÖNAL

Mehmet Ali Recai ÖNAL


Research Focus & Metrics

Academic Career Length

13Years (2014-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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7 July 2015 in Journal of Sustainable Metallurgy
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Journal Article
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MÖMehmet Ali Recai ÖNAL
Mehmet Ali Recai ÖNAL
Chenna BorraChenna Borra
Chenna Borra
MGMuxing Guo
Muxing Guo
BBBart Blanpain
Bart Blanpain
TGTom Van Gerven
Tom Van Gerven

1 June 2017 in Journal of Rare Earths
Verified
Journal Article
Closed access
MÖMehmet Ali Recai ÖNAL
Mehmet Ali Recai ÖNAL
CBChenna Rao Borra
Chenna Rao Borra
MGMuxing Guo
Muxing Guo
BBBart Blanpain
Bart Blanpain
TGTom Van Gerven
Tom Van Gerven

1 January 2017 in Hydrometallurgy
Verified
Journal Article
Closed access
MÖMehmet Ali Recai ÖNAL
Mehmet Ali Recai ÖNAL
EAEmir Aktan
Emir Aktan
Chenna BorraChenna Borra
Chenna Borra
BBBart Blanpain
Bart Blanpain
TGTom Van Gerven
Tom Van Gerven
MGMuxing Guo
Muxing Guo

1 February 2014 in Hydrometallurgy
Verified
Journal Article
Closed access
MÖMehmet Ali Recai ÖNAL
Mehmet Ali Recai ÖNAL
YTYavuz Ali Topkaya
Yavuz Ali Topkaya

15 April 2020 in Green Chemistry
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Journal Article
Open access
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MÖMehmet Ali Recai ÖNAL
Mehmet Ali Recai ÖNAL
SDSven Dewilde
Sven Dewilde
MDMalik Degri
Malik Degri
LPLydia Pickering
Lydia Pickering
BSBoris Saje
Boris Saje
KBKoen Binnemans
Koen Binnemans
NdFeB permanent magnets are essential for modern day technology thanks to their excellent magnetic properties. Recycling of critical metals from sintered NdFeB permanent magnets has attracted a lot of attention over the last decade, whereas the recycling of (polymer or resin) bonded NdFeB magnets has been largely neglected. In this paper, an overview of the polymer or resin binders used in commercial bonded magnets is presented and different routes for the recycling of these magnets are explored. Three main types of polymers were found in commercial bonded NdFeB magnets: polyamides (PA6 and PA12), poly-p-phenylene sulfide (PPS) and epoxy. Both types of polyamide resins were easily dissolved by ionic liquids with coordinating anions (chloride, acetate or dialkylphosphate). Removal of the PPS resin was not possible by ionic liquid solvents, but only by using 1-chloronaphthalene and 1,3,5-triphenylbenzene at high temperatures. Although epoxy could be removed by several ionic liquids, reaction between the NdFeB powder and the ionic liquids was observed. A batch of PA6-bonded magnets was treated with an ionic liquid tributylethylphosphonium diethylphosphate, [P4442][Et2PO4], to selectively remove the polymeric portion. The PA-free magnet powder was found to retain >90% of its original magnetic properties. Two epoxy-bonded magnets produced with this recycled magnet powder showed magnetic properties that were close to those of commercial counterparts, proving the versatility of the process and that the materials loop could be successfully closed.

1 January 2020 in Hydrometallurgy
Verified
Journal Article
Open access
MÖMehmet Ali Recai ÖNAL
Mehmet Ali Recai ÖNAL
SRSofía Riaño
Sofía Riaño
KBKoen Binnemans
Koen Binnemans