Effect of annealing on magnetic properties of Fe/Fe^sub 3^O^sub 4^ soft magnetic composites prepared by in-situ oxidation and hydrogen reduction methods
Iron-based soft magnetic composites (SMCs) coated with the ferrimagnetic Fe3O4 layer have been fabricated by in-situ oxidation and hydrogen reduction methods, and then the effects of annealing process on the soft magnetic properties were investigated. It showed that the Fe3O4 insulating layer was co...
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| Veröffentlicht in: | Journal of alloys and compounds 2019-03, Vol.778, p.712 |
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| creator | Qian, Liwei Peng, Jingguang Xiang, Zhen Pan, Yifan Lu, Wei |
| description | Iron-based soft magnetic composites (SMCs) coated with the ferrimagnetic Fe3O4 layer have been fabricated by in-situ oxidation and hydrogen reduction methods, and then the effects of annealing process on the soft magnetic properties were investigated. It showed that the Fe3O4 insulating layer was coated on the surface of the iron powders, which effectively reduced the magnetic dilution and decreased the core loss of the composites. In addition, the Fe/Fe3O4 core-shell composites exhibited high permeability and frequency stability of permeability after annealing. The real part of permeability of the soft magnetic composites could reach a maximal value of 142.9 and a rather low core loss of 274.9 W/kg (measured at 50 mT and 100 kHz). Based on the magnetic loss separation model, the hysteresis loss and eddy current loss coefficient was obtained. It was indicated that the annealing process enhanced the eddy current loss coefficient while the hysteresis loss coefficient is close to each other for all the samples. Therefore, this work can provide a method to prepare soft magnetic composites with excellent magnetic properties and low core loss. |
| doi_str_mv | 10.1016/j.jallcom.2018.11.184 |
| format | Article |
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It showed that the Fe3O4 insulating layer was coated on the surface of the iron powders, which effectively reduced the magnetic dilution and decreased the core loss of the composites. In addition, the Fe/Fe3O4 core-shell composites exhibited high permeability and frequency stability of permeability after annealing. The real part of permeability of the soft magnetic composites could reach a maximal value of 142.9 and a rather low core loss of 274.9 W/kg (measured at 50 mT and 100 kHz). Based on the magnetic loss separation model, the hysteresis loss and eddy current loss coefficient was obtained. It was indicated that the annealing process enhanced the eddy current loss coefficient while the hysteresis loss coefficient is close to each other for all the samples. Therefore, this work can provide a method to prepare soft magnetic composites with excellent magnetic properties and low core loss.</description><identifier>ISSN: 0925-8388</identifier><identifier>EISSN: 1873-4669</identifier><identifier>DOI: 10.1016/j.jallcom.2018.11.184</identifier><language>eng</language><publisher>Lausanne: Elsevier BV</publisher><subject>Annealing ; Coating effects ; Coefficients ; Core loss ; Current loss ; Dilution ; Eddy current testing ; Eddy currents ; Ferrimagnetism ; Frequency stability ; Hydrogen reduction ; Hysteresis models ; Iron oxides ; Magnetic permeability ; Magnetic properties ; Oxidation ; Particulate composites ; Permeability ; Product design ; Reduction ; Shell stability</subject><ispartof>Journal of alloys and compounds, 2019-03, Vol.778, p.712</ispartof><rights>Copyright Elsevier BV Mar 25, 2019</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,777,781,27905,27906</link.rule.ids></links><search><creatorcontrib>Qian, Liwei</creatorcontrib><creatorcontrib>Peng, Jingguang</creatorcontrib><creatorcontrib>Xiang, Zhen</creatorcontrib><creatorcontrib>Pan, Yifan</creatorcontrib><creatorcontrib>Lu, Wei</creatorcontrib><title>Effect of annealing on magnetic properties of Fe/Fe^sub 3^O^sub 4^ soft magnetic composites prepared by in-situ oxidation and hydrogen reduction methods</title><title>Journal of alloys and compounds</title><description>Iron-based soft magnetic composites (SMCs) coated with the ferrimagnetic Fe3O4 layer have been fabricated by in-situ oxidation and hydrogen reduction methods, and then the effects of annealing process on the soft magnetic properties were investigated. It showed that the Fe3O4 insulating layer was coated on the surface of the iron powders, which effectively reduced the magnetic dilution and decreased the core loss of the composites. In addition, the Fe/Fe3O4 core-shell composites exhibited high permeability and frequency stability of permeability after annealing. The real part of permeability of the soft magnetic composites could reach a maximal value of 142.9 and a rather low core loss of 274.9 W/kg (measured at 50 mT and 100 kHz). Based on the magnetic loss separation model, the hysteresis loss and eddy current loss coefficient was obtained. It was indicated that the annealing process enhanced the eddy current loss coefficient while the hysteresis loss coefficient is close to each other for all the samples. Therefore, this work can provide a method to prepare soft magnetic composites with excellent magnetic properties and low core loss.</description><subject>Annealing</subject><subject>Coating effects</subject><subject>Coefficients</subject><subject>Core loss</subject><subject>Current loss</subject><subject>Dilution</subject><subject>Eddy current testing</subject><subject>Eddy currents</subject><subject>Ferrimagnetism</subject><subject>Frequency stability</subject><subject>Hydrogen reduction</subject><subject>Hysteresis models</subject><subject>Iron oxides</subject><subject>Magnetic permeability</subject><subject>Magnetic properties</subject><subject>Oxidation</subject><subject>Particulate composites</subject><subject>Permeability</subject><subject>Product design</subject><subject>Reduction</subject><subject>Shell stability</subject><issn>0925-8388</issn><issn>1873-4669</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNqNjkFLxDAUhIMoWHV_gvDAc7t5bbdNz7LFmxfPXbLtazelTWqSgvtP_LnGRfC6p4GZb5hh7Bl5ghyL7ZiMcppaMycpR5EgJijyGxahKLM4L4rqlkW8SnexyIS4Zw_OjZxzrDKM2Pe-76n1YHqQWpOclB7AaJjloMmrFhZrFrJekftlatrW1Lj1CFnzftG8AWd6_18IPxbjlA-FxdIiLXVwPIPScTBXMF-qk16FCak7OJ07awbSEKi1vdgz-ZPp3BO76-XkaPOnj-yl3n-8vsXh0OdKzh9Gs1odokOKZVHysipFdh31A7vtYpA</recordid><startdate>20190325</startdate><enddate>20190325</enddate><creator>Qian, Liwei</creator><creator>Peng, Jingguang</creator><creator>Xiang, Zhen</creator><creator>Pan, Yifan</creator><creator>Lu, Wei</creator><general>Elsevier BV</general><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20190325</creationdate><title>Effect of annealing on magnetic properties of Fe/Fe^sub 3^O^sub 4^ soft magnetic composites prepared by in-situ oxidation and hydrogen reduction methods</title><author>Qian, Liwei ; Peng, Jingguang ; Xiang, Zhen ; Pan, Yifan ; Lu, Wei</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-proquest_journals_21767079783</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Annealing</topic><topic>Coating effects</topic><topic>Coefficients</topic><topic>Core loss</topic><topic>Current loss</topic><topic>Dilution</topic><topic>Eddy current testing</topic><topic>Eddy currents</topic><topic>Ferrimagnetism</topic><topic>Frequency stability</topic><topic>Hydrogen reduction</topic><topic>Hysteresis models</topic><topic>Iron oxides</topic><topic>Magnetic permeability</topic><topic>Magnetic properties</topic><topic>Oxidation</topic><topic>Particulate composites</topic><topic>Permeability</topic><topic>Product design</topic><topic>Reduction</topic><topic>Shell stability</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Qian, Liwei</creatorcontrib><creatorcontrib>Peng, Jingguang</creatorcontrib><creatorcontrib>Xiang, Zhen</creatorcontrib><creatorcontrib>Pan, Yifan</creatorcontrib><creatorcontrib>Lu, Wei</creatorcontrib><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Journal of alloys and compounds</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Qian, Liwei</au><au>Peng, Jingguang</au><au>Xiang, Zhen</au><au>Pan, Yifan</au><au>Lu, Wei</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effect of annealing on magnetic properties of Fe/Fe^sub 3^O^sub 4^ soft magnetic composites prepared by in-situ oxidation and hydrogen reduction methods</atitle><jtitle>Journal of alloys and compounds</jtitle><date>2019-03-25</date><risdate>2019</risdate><volume>778</volume><spage>712</spage><pages>712-</pages><issn>0925-8388</issn><eissn>1873-4669</eissn><abstract>Iron-based soft magnetic composites (SMCs) coated with the ferrimagnetic Fe3O4 layer have been fabricated by in-situ oxidation and hydrogen reduction methods, and then the effects of annealing process on the soft magnetic properties were investigated. It showed that the Fe3O4 insulating layer was coated on the surface of the iron powders, which effectively reduced the magnetic dilution and decreased the core loss of the composites. In addition, the Fe/Fe3O4 core-shell composites exhibited high permeability and frequency stability of permeability after annealing. The real part of permeability of the soft magnetic composites could reach a maximal value of 142.9 and a rather low core loss of 274.9 W/kg (measured at 50 mT and 100 kHz). Based on the magnetic loss separation model, the hysteresis loss and eddy current loss coefficient was obtained. It was indicated that the annealing process enhanced the eddy current loss coefficient while the hysteresis loss coefficient is close to each other for all the samples. Therefore, this work can provide a method to prepare soft magnetic composites with excellent magnetic properties and low core loss.</abstract><cop>Lausanne</cop><pub>Elsevier BV</pub><doi>10.1016/j.jallcom.2018.11.184</doi></addata></record> |
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| source | Elsevier ScienceDirect Journals |
| subjects | Annealing Coating effects Coefficients Core loss Current loss Dilution Eddy current testing Eddy currents Ferrimagnetism Frequency stability Hydrogen reduction Hysteresis models Iron oxides Magnetic permeability Magnetic properties Oxidation Particulate composites Permeability Product design Reduction Shell stability |
| title | Effect of annealing on magnetic properties of Fe/Fe^sub 3^O^sub 4^ soft magnetic composites prepared by in-situ oxidation and hydrogen reduction methods |
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