2dceb8fc82ef34a30c27420f9f2eb5a5 28-Synthesis_of_-Fe2O3_and_Fe-Mn_Oxide_Foams_with.pdf 62cc8f6845792ef70d2b0c05415195c80b920082 28-Synthesis_of_-Fe2O3_and_Fe-Mn_Oxide_Foams_with.pdf ca55ce2ba59faf8516e619bd82a63edb259d71830553bb463700771e979d8587 28-Synthesis_of_-Fe2O3_and_Fe-Mn_Oxide_Foams_with.pdf Title: Synthesis of -Fe2O3 and Fe-Mn Oxide Foams with Highly Tunable Magnetic Properties by the Replication Method from Polyurethane Templates Subject: Open cell foams consisting of Fe and Fe-Mn oxides are prepared from metallic Fe and Mn powder precursors by the replication method using porous polyurethane (PU) templates. First, reticulated PU templates are coated by slurry impregnation. The templates are then thermally removed at 260 C and the debinded powders are sintered at 1000 C under N2 atmosphere. The morphology, structure, and magnetic properties are studied by scanning electron microscopy, X-ray diffraction and vibrating sample magnetometry, respectively. The obtained Fe and Fe-Mn oxide foams possess both high surface area and homogeneous open-cell structure. Hematite (-Fe2O3) foams are obtained from the metallic iron slurry independently of the N2 flow. In contrast, the microstructure of the FeMn-based oxide foams can be tailored by adjusting the N2 flow. While the main phases for a N2 flow rate of 180 L/h are -Fe2O3 and FeMnO3, the predominant phase for high N2 flow rates (e.g., 650 L/h) is Fe2MnO4. Accordingly, a linear magnetization versus field behavior is observed for the hematite foams, while clear hysteresis loops are obtained for the Fe2MnO4 foams. Actually, the saturation magnetization of the foams containing Mn increases from 5 emu/g to 52 emu/g when the N2 flow rate (i.e., the amount of Fe2MnO4) is increased. The obtained foams are appealing for a wide range of applications, such as electromagnetic absorbers, catalysts supports, thermal and acoustic insulation systems or wirelessly magnetically-guided porous objects in fluids. Keywords: porous inorganic oxide foams; manganese ferrite; Iron oxide; replication processing; magnetic properties Author: Yuping Feng, Jordina Fornell, Huiyan Zhang, Pau Solsona, Maria Dolors Barό, Santiago Suriñach, Eva Pellicer and Jordi Sort Creator: LaTeX with hyperref package Producer: pdfTeX-1.40.17 CreationDate: Mon Feb 12 02:57:22 2018 CET ModDate: Mon Feb 12 02:57:22 2018 CET Tagged: no UserProperties: no Suspects: no Form: none JavaScript: no Pages: 7 Encrypted: no Page size: 595.276 x 841.89 pts (A4) Page rot: 0 File size: 2895469 bytes Optimized: no PDF version: 1.5 name type encoding emb sub uni object ID ------------------------------------ ----------------- ---------------- --- --- --- --------- RVKNXM+URWPalladioL-Ital Type 1 Custom yes yes no 58 0 LDZUUB+URWPalladioL-Bold Type 1 Custom yes yes no 59 0 CZOINJ+EURB10 Type 1 Builtin yes yes no 60 0 OXBKYU+TeXGyreAdventor-Bold Type 1 Custom yes yes no 61 0 MKIOUL+URWPalladioL-Roma Type 1 Custom yes yes no 62 0 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no 274 0 NPKADC+PalatinoLinotype,Italic TrueType WinAnsi yes yes no 275 0 NPKAEE+PalatinoLinotype,Bold TrueType WinAnsi yes yes no 276 0 NPKAJD+TimesNewRoman CID TrueType Identity-H yes yes yes 277 0 CRUZTT+VnURWPalladioL-Italic Type 1 Custom yes yes no 329 0 Jhove (Rel. 1.22.1, 2019-04-17) Date: 2020-11-06 06:05:24 CET RepresentationInformation: 28-Synthesis_of_-Fe2O3_and_Fe-Mn_Oxide_Foams_with.pdf ReportingModule: PDF-hul, Rel. 1.12.1 (2019-04-17) LastModified: 2020-10-28 12:13:38 CET Size: 2895469 Format: PDF Version: 1.5 Status: Well-Formed and valid SignatureMatches: PDF-hul MIMEtype: application/pdf PDFMetadata: Objects: 0 FreeObjects: 1 IncrementalUpdates: 0 DocumentCatalog: ViewerPreferences: HideToolbar: false HideMenubar: false HideWindowUI: false FitWindow: true CenterWindow: false DisplayDocTitle: false NonFullScreenPageMode: UseNone Direction: L2R ViewArea: CropBox ViewClip: CropBox PrintArea: CropBox PageClip: CropBox PageLayout: SinglePage PageMode: UseNone Outlines: 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