Low-temperature annealing effect on plasma sprayed MnZn ferrite for planar transformers of high-frequency applications
MnZn ferrite coatings fabricated by plasma spray have the advantage of a columnar structure with average grain size between 200-300 nm, somewhat analogous to that of conventional laminated cores used to minimize the eddy current loss at high frequency. The resistivity of these ferrite coatings incre...
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| Veröffentlicht in: | IEEE transactions on magnetics 2003-09, Vol.39 (5), p.3106-3108 |
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| container_title | IEEE transactions on magnetics |
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| creator | Yan, Q.Y. Gambino, R.J. Sampath, S. |
| description | MnZn ferrite coatings fabricated by plasma spray have the advantage of a columnar structure with average grain size between 200-300 nm, somewhat analogous to that of conventional laminated cores used to minimize the eddy current loss at high frequency. The resistivity of these ferrite coatings increases by four orders of magnitude after a simple annealing process at 500/spl deg/C in air. Our studies reveal that this change is due to oxygen diffusion through the grain boundaries, which results in the oxidation of Fe/sup 2+/ to Fe/sup 3+/ and inhibits the "hopping" conductivity effect between Fe/sup 2+/ and Fe/sup 3+/. The initial permeability at 100 kHz increases from around 500 to above 1000. This change is believed to be due to the local- and long-range redistribution of Mn and Zn, which improves the soft magnetic properties of the ferrite coatings. |
| doi_str_mv | 10.1109/TMAG.2003.816020 |
| format | Article |
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The resistivity of these ferrite coatings increases by four orders of magnitude after a simple annealing process at 500/spl deg/C in air. Our studies reveal that this change is due to oxygen diffusion through the grain boundaries, which results in the oxidation of Fe/sup 2+/ to Fe/sup 3+/ and inhibits the "hopping" conductivity effect between Fe/sup 2+/ and Fe/sup 3+/. The initial permeability at 100 kHz increases from around 500 to above 1000. 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(IEEE) 2003</rights><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c349t-8eba94db40169ab2e02ea0e108929899030fbf2b118979c782237aded3a7c71b3</citedby><cites>FETCH-LOGICAL-c349t-8eba94db40169ab2e02ea0e108929899030fbf2b118979c782237aded3a7c71b3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://ieeexplore.ieee.org/document/1233314$$EHTML$$P50$$Gieee$$H</linktohtml><link.rule.ids>309,310,314,776,780,785,786,792,23910,23911,25119,27903,27904,54736</link.rule.ids><linktorsrc>$$Uhttps://ieeexplore.ieee.org/document/1233314$$EView_record_in_IEEE$$FView_record_in_$$GIEEE</linktorsrc><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=15162175$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Yan, Q.Y.</creatorcontrib><creatorcontrib>Gambino, R.J.</creatorcontrib><creatorcontrib>Sampath, S.</creatorcontrib><title>Low-temperature annealing effect on plasma sprayed MnZn ferrite for planar transformers of high-frequency applications</title><title>IEEE transactions on magnetics</title><addtitle>TMAG</addtitle><description>MnZn ferrite coatings fabricated by plasma spray have the advantage of a columnar structure with average grain size between 200-300 nm, somewhat analogous to that of conventional laminated cores used to minimize the eddy current loss at high frequency. The resistivity of these ferrite coatings increases by four orders of magnitude after a simple annealing process at 500/spl deg/C in air. Our studies reveal that this change is due to oxygen diffusion through the grain boundaries, which results in the oxidation of Fe/sup 2+/ to Fe/sup 3+/ and inhibits the "hopping" conductivity effect between Fe/sup 2+/ and Fe/sup 3+/. The initial permeability at 100 kHz increases from around 500 to above 1000. This change is believed to be due to the local- and long-range redistribution of Mn and Zn, which improves the soft magnetic properties of the ferrite coatings.</description><subject>Annealing</subject><subject>Coatings</subject><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Conductivity</subject><subject>Eddy currents</subject><subject>Exact sciences and technology</subject><subject>Ferrites</subject><subject>Grain size</subject><subject>Iron</subject><subject>Magnetic properties and materials</subject><subject>Magnetic properties of monolayers and thin films</subject><subject>Magnetic properties of surface, thin films and multilayers</subject><subject>Magnetism</subject><subject>Physics</subject><subject>Plasma applications</subject><subject>Thermal spraying</subject><subject>Transformer cores</subject><issn>0018-9464</issn><issn>1941-0069</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2003</creationdate><recordtype>article</recordtype><sourceid>RIE</sourceid><recordid>eNpdkc1r3DAQxUVpoduk90IvotDevBl9rC0dQ0jTwoZekksuYqwdJQq27Erelv3vq2UDgZ6G4f3m8ZjH2CcBayHAXtzdXt6sJYBaG9GChDdsJawWDUBr37IVgDCN1a1-zz6U8lxXvRGwYn-2099moXGmjMs-E8eUCIeYHjmFQH7hU-LzgGVEXuaMB9rx2_SQeKCc40I8TPmoJ8x8yZhK3UfKhU-BP8XHpyZk-r2n5A8c53mIHpc4pXLO3gUcCn18mWfs_vv13dWPZvvr5ufV5bbxStulMdSj1bteg2gt9pJAEgIJMFZaYy0oCH2QvRDGdtZ3RkrV4Y52CjvfiV6dsW8n3zlPNUZZ3BiLp6EGpmlfnDTKdNbKCn75D3ye9jnVbM4YrbQBqysEJ8jnqZRMwc05jpgPToA7tuCOLbhjC-7UQj35-uKLxeMQ6ot8LK93G9FK0W0q9_nERSJ6laVSSmj1Dzgukbc</recordid><startdate>20030901</startdate><enddate>20030901</enddate><creator>Yan, Q.Y.</creator><creator>Gambino, R.J.</creator><creator>Sampath, S.</creator><general>IEEE</general><general>Institute of Electrical and Electronics Engineers</general><general>The Institute of Electrical and Electronics Engineers, Inc. (IEEE)</general><scope>RIA</scope><scope>RIE</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20030901</creationdate><title>Low-temperature annealing effect on plasma sprayed MnZn ferrite for planar transformers of high-frequency applications</title><author>Yan, Q.Y. ; Gambino, R.J. ; Sampath, S.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c349t-8eba94db40169ab2e02ea0e108929899030fbf2b118979c782237aded3a7c71b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2003</creationdate><topic>Annealing</topic><topic>Coatings</topic><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>Conductivity</topic><topic>Eddy currents</topic><topic>Exact sciences and technology</topic><topic>Ferrites</topic><topic>Grain size</topic><topic>Iron</topic><topic>Magnetic properties and materials</topic><topic>Magnetic properties of monolayers and thin films</topic><topic>Magnetic properties of surface, thin films and multilayers</topic><topic>Magnetism</topic><topic>Physics</topic><topic>Plasma applications</topic><topic>Thermal spraying</topic><topic>Transformer cores</topic><toplevel>online_resources</toplevel><creatorcontrib>Yan, Q.Y.</creatorcontrib><creatorcontrib>Gambino, R.J.</creatorcontrib><creatorcontrib>Sampath, S.</creatorcontrib><collection>IEEE All-Society Periodicals Package (ASPP) 1998-Present</collection><collection>IEEE Electronic Library (IEL)</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>IEEE transactions on magnetics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>Yan, Q.Y.</au><au>Gambino, R.J.</au><au>Sampath, S.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Low-temperature annealing effect on plasma sprayed MnZn ferrite for planar transformers of high-frequency applications</atitle><jtitle>IEEE transactions on magnetics</jtitle><stitle>TMAG</stitle><date>2003-09-01</date><risdate>2003</risdate><volume>39</volume><issue>5</issue><spage>3106</spage><epage>3108</epage><pages>3106-3108</pages><issn>0018-9464</issn><eissn>1941-0069</eissn><coden>IEMGAQ</coden><abstract>MnZn ferrite coatings fabricated by plasma spray have the advantage of a columnar structure with average grain size between 200-300 nm, somewhat analogous to that of conventional laminated cores used to minimize the eddy current loss at high frequency. The resistivity of these ferrite coatings increases by four orders of magnitude after a simple annealing process at 500/spl deg/C in air. Our studies reveal that this change is due to oxygen diffusion through the grain boundaries, which results in the oxidation of Fe/sup 2+/ to Fe/sup 3+/ and inhibits the "hopping" conductivity effect between Fe/sup 2+/ and Fe/sup 3+/. The initial permeability at 100 kHz increases from around 500 to above 1000. This change is believed to be due to the local- and long-range redistribution of Mn and Zn, which improves the soft magnetic properties of the ferrite coatings.</abstract><cop>New York, NY</cop><pub>IEEE</pub><doi>10.1109/TMAG.2003.816020</doi><tpages>3</tpages></addata></record> |
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| subjects | Annealing Coatings Condensed matter: electronic structure, electrical, magnetic, and optical properties Conductivity Eddy currents Exact sciences and technology Ferrites Grain size Iron Magnetic properties and materials Magnetic properties of monolayers and thin films Magnetic properties of surface, thin films and multilayers Magnetism Physics Plasma applications Thermal spraying Transformer cores |
| title | Low-temperature annealing effect on plasma sprayed MnZn ferrite for planar transformers of high-frequency applications |
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