Magnetic and structural study of mechanochemical reactions in the Al-Fe3O4 system
The solid state reaction between Al and Fe3O4 (magnetite) using mechanochemical activation of powder mixtures under Ar atmosphere is studied. The phase evolution during the reaction is analyzed by X-ray diffraction (XRD), vibrating sample magnetometry (VSM), differential thermal analysis (DTA) and s...
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| Veröffentlicht in: | Journal of materials science 2002-06, Vol.37 (12), p.2563-2568 |
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| container_end_page | 2568 |
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| container_issue | 12 |
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| container_title | Journal of materials science |
| container_volume | 37 |
| creator | BOTTA, P. M BERCOFF, P. G AGLIETTI, E. F BERTORELLO, H. R PORTO LOPEZ, J. M |
| description | The solid state reaction between Al and Fe3O4 (magnetite) using mechanochemical activation of powder mixtures under Ar atmosphere is studied. The phase evolution during the reaction is analyzed by X-ray diffraction (XRD), vibrating sample magnetometry (VSM), differential thermal analysis (DTA) and scanning electron microscopy (SEM). At 37 minutes of high-energy ball-milling the disappearance of reactive phases and the production of α-Fe, FeAl2O4 and α-Al2O3 is observed, together with significant changes in the magnetic behavior of the system. The composition and properties of samples heated up to 1200°C are also investigated. The behavior of the saturation magnetization Ms is interpreted on the basis of the formation of a variable composition spinel phase Fe [Alx Fe2−x] O4 with 0 ≤ x ≤ 2 and a canting effect due to the presence of Al3+ ions in the spinel structure. |
| doi_str_mv | 10.1023/A:1015412211898 |
| format | Article |
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M ; BERCOFF, P. G ; AGLIETTI, E. F ; BERTORELLO, H. R ; PORTO LOPEZ, J. M</creator><contributor>WCA</contributor><creatorcontrib>BOTTA, P. M ; BERCOFF, P. G ; AGLIETTI, E. F ; BERTORELLO, H. R ; PORTO LOPEZ, J. M ; WCA</creatorcontrib><description>The solid state reaction between Al and Fe3O4 (magnetite) using mechanochemical activation of powder mixtures under Ar atmosphere is studied. The phase evolution during the reaction is analyzed by X-ray diffraction (XRD), vibrating sample magnetometry (VSM), differential thermal analysis (DTA) and scanning electron microscopy (SEM). At 37 minutes of high-energy ball-milling the disappearance of reactive phases and the production of α-Fe, FeAl2O4 and α-Al2O3 is observed, together with significant changes in the magnetic behavior of the system. The composition and properties of samples heated up to 1200°C are also investigated. The behavior of the saturation magnetization Ms is interpreted on the basis of the formation of a variable composition spinel phase Fe [Alx Fe2−x] O4 with 0 ≤ x ≤ 2 and a canting effect due to the presence of Al3+ ions in the spinel structure.</description><identifier>ISSN: 0022-2461</identifier><identifier>EISSN: 1573-4803</identifier><identifier>DOI: 10.1023/A:1015412211898</identifier><identifier>CODEN: JMTSAS</identifier><language>eng</language><publisher>Heidelberg: Springer</publisher><subject>Aluminum oxide ; Ball milling ; Chemistry ; Composition ; Differential thermal analysis ; Exact sciences and technology ; Inorganic chemistry and origins of life ; Iron oxides ; Kinetics and mechanism of reactions ; Magnetic measurement ; Magnetic properties ; Magnetic saturation ; Materials science ; Scanning electron microscopy ; Spinel</subject><ispartof>Journal of materials science, 2002-06, Vol.37 (12), p.2563-2568</ispartof><rights>2002 INIST-CNRS</rights><rights>Journal of Materials Science is a copyright of Springer, (2002). 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The behavior of the saturation magnetization Ms is interpreted on the basis of the formation of a variable composition spinel phase Fe [Alx Fe2−x] O4 with 0 ≤ x ≤ 2 and a canting effect due to the presence of Al3+ ions in the spinel structure.</description><subject>Aluminum oxide</subject><subject>Ball milling</subject><subject>Chemistry</subject><subject>Composition</subject><subject>Differential thermal analysis</subject><subject>Exact sciences and technology</subject><subject>Inorganic chemistry and origins of life</subject><subject>Iron oxides</subject><subject>Kinetics and mechanism of reactions</subject><subject>Magnetic measurement</subject><subject>Magnetic properties</subject><subject>Magnetic saturation</subject><subject>Materials science</subject><subject>Scanning electron microscopy</subject><subject>Spinel</subject><issn>0022-2461</issn><issn>1573-4803</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNqN0M9LwzAUB_AgCs7p2WtA9FZ9Lz-axNsYToXJEPRc0iR1HW06m_aw_96CO3ny9B58Pzz4PkKuEe4RGH9YPCKgFMgYojb6hMxQKp4JDfyUzAAYy5jI8ZxcpLQDAKkYzsj7m_2KYagdtdHTNPSjG8beNtM6-gPtKtoGt7Wxc9vQ1m4K-mDdUHcx0TrSYRvooslWgW8ETYc0hPaSnFW2SeHqOOfkc_X0sXzJ1pvn1-VinTmOZsiMcL5SJofSc51rkFZ7rWTlRWmwEiUqAO2lBCy5AGNBBC58xZyxDhQLfE7ufu_u--57DGko2jq50DQ2hm5MBVMMkIP5FwQlYYI3f-CuG_s4lSgYywGRSS4ndXtUNk3_qHobXZ2KfV-3tj8UyBVomSv-AztEd4E</recordid><startdate>20020615</startdate><enddate>20020615</enddate><creator>BOTTA, P. 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At 37 minutes of high-energy ball-milling the disappearance of reactive phases and the production of α-Fe, FeAl2O4 and α-Al2O3 is observed, together with significant changes in the magnetic behavior of the system. The composition and properties of samples heated up to 1200°C are also investigated. The behavior of the saturation magnetization Ms is interpreted on the basis of the formation of a variable composition spinel phase Fe [Alx Fe2−x] O4 with 0 ≤ x ≤ 2 and a canting effect due to the presence of Al3+ ions in the spinel structure.</abstract><cop>Heidelberg</cop><pub>Springer</pub><doi>10.1023/A:1015412211898</doi><tpages>6</tpages></addata></record> |
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| subjects | Aluminum oxide Ball milling Chemistry Composition Differential thermal analysis Exact sciences and technology Inorganic chemistry and origins of life Iron oxides Kinetics and mechanism of reactions Magnetic measurement Magnetic properties Magnetic saturation Materials science Scanning electron microscopy Spinel |
| title | Magnetic and structural study of mechanochemical reactions in the Al-Fe3O4 system |
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