Elaboration of nickel nanoparticles by modified polyol process and their spark plasma sintering, characterization and magnetic properties of the nanoparticles and the dense nano-structured material
Well crystallized nickel nanoparticles with various diameters were prepared by modified polyol process in the presence of sodium hypophosphite as reducing agent. Dense nano-structured (DNS) samples of these nanopowders were obtained using the spark plasma sintering technique. Magnetic characteristic...
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| Veröffentlicht in: | Materials chemistry and physics 2010-10, Vol.123 (2), p.821-828 |
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| creator | Omrani, A. Dakhlaoui Bousnina, M.A. Smiri, L.S. Taibi, M. Leone, P. Schoenstein, F. Jouini, N. |
| description | Well crystallized nickel nanoparticles with various diameters were prepared by modified polyol process in the presence of sodium hypophosphite as reducing agent. Dense nano-structured (DNS) samples of these nanopowders were obtained using the spark plasma sintering technique. Magnetic characteristics of the powders and the dense samples were studied through the zero-field-cooling (ZFC)/field-cooling (FC) and the hysteresis measurements. Irreversibility in the (ZFC/FC) curves was observed for all samples and could be interpreted in terms of the unblocking of magnetization for the nanoparticles with diameter below 50
nm and domain wall depinning for the nanoparticles with diameter above 50
nm and for the DNS samples. Compared with bulk nickel, the nanoparticles and the DNS samples exhibited an enhanced coercivity and a decreased saturation magnetization; the relatively elevated value of the coercivity especially for the Ni nanoparticles could be due to their anisotropic morphology and their small size. The low values of the saturation magnetization could result from the inevitable surface oxidation of the powder. |
| doi_str_mv | 10.1016/j.matchemphys.2010.05.068 |
| format | Article |
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nm and domain wall depinning for the nanoparticles with diameter above 50
nm and for the DNS samples. Compared with bulk nickel, the nanoparticles and the DNS samples exhibited an enhanced coercivity and a decreased saturation magnetization; the relatively elevated value of the coercivity especially for the Ni nanoparticles could be due to their anisotropic morphology and their small size. The low values of the saturation magnetization could result from the inevitable surface oxidation of the powder.</description><identifier>ISSN: 0254-0584</identifier><identifier>EISSN: 1879-3312</identifier><identifier>DOI: 10.1016/j.matchemphys.2010.05.068</identifier><language>eng</language><publisher>Elsevier B.V</publisher><subject>Chemical synthesis ; Coercive force ; Condensed Matter ; Magnetic properties ; Materials Science ; Nanocomposites ; Nanomaterials ; Nanoparticles ; Nanostructure ; Nickel ; Physics ; Polyol ; Polyols ; Saturation (magnetic) ; Spark plasma sintering</subject><ispartof>Materials chemistry and physics, 2010-10, Vol.123 (2), p.821-828</ispartof><rights>2010 Elsevier B.V.</rights><rights>Distributed under a Creative Commons Attribution 4.0 International License</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c387t-3cae4095a652ec065267f1cc8a5463232d5531f4ca97134acfcc4fe12f4fc153</citedby><cites>FETCH-LOGICAL-c387t-3cae4095a652ec065267f1cc8a5463232d5531f4ca97134acfcc4fe12f4fc153</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0254058410004529$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>230,314,776,780,881,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttps://hal.science/hal-00848935$$DView record in HAL$$Hfree_for_read</backlink></links><search><creatorcontrib>Omrani, A. Dakhlaoui</creatorcontrib><creatorcontrib>Bousnina, M.A.</creatorcontrib><creatorcontrib>Smiri, L.S.</creatorcontrib><creatorcontrib>Taibi, M.</creatorcontrib><creatorcontrib>Leone, P.</creatorcontrib><creatorcontrib>Schoenstein, F.</creatorcontrib><creatorcontrib>Jouini, N.</creatorcontrib><title>Elaboration of nickel nanoparticles by modified polyol process and their spark plasma sintering, characterization and magnetic properties of the nanoparticles and the dense nano-structured material</title><title>Materials chemistry and physics</title><description>Well crystallized nickel nanoparticles with various diameters were prepared by modified polyol process in the presence of sodium hypophosphite as reducing agent. Dense nano-structured (DNS) samples of these nanopowders were obtained using the spark plasma sintering technique. Magnetic characteristics of the powders and the dense samples were studied through the zero-field-cooling (ZFC)/field-cooling (FC) and the hysteresis measurements. Irreversibility in the (ZFC/FC) curves was observed for all samples and could be interpreted in terms of the unblocking of magnetization for the nanoparticles with diameter below 50
nm and domain wall depinning for the nanoparticles with diameter above 50
nm and for the DNS samples. Compared with bulk nickel, the nanoparticles and the DNS samples exhibited an enhanced coercivity and a decreased saturation magnetization; the relatively elevated value of the coercivity especially for the Ni nanoparticles could be due to their anisotropic morphology and their small size. The low values of the saturation magnetization could result from the inevitable surface oxidation of the powder.</description><subject>Chemical synthesis</subject><subject>Coercive force</subject><subject>Condensed Matter</subject><subject>Magnetic properties</subject><subject>Materials Science</subject><subject>Nanocomposites</subject><subject>Nanomaterials</subject><subject>Nanoparticles</subject><subject>Nanostructure</subject><subject>Nickel</subject><subject>Physics</subject><subject>Polyol</subject><subject>Polyols</subject><subject>Saturation (magnetic)</subject><subject>Spark plasma sintering</subject><issn>0254-0584</issn><issn>1879-3312</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNqNkV-L1DAUxYsoOK5-h_gkgh2Tpumfx2VYXWHAl30Pd29vt5lNk5pkFsbv5_cypYuIT74k5Oac3-FyiuK94HvBRfP5tJ8h4UTzMl3ivuJ5ztWeN92LYie6ti-lFNXLYscrVZdcdfXr4k2MJ85FK4TcFb9uLNz7AMl4x_zInMFHssyB8wuEZNBSZPcXNvvBjIYGtnh78ZYtwSPFyMANLE1kAotZ_8gWC3EGFo1LFIx7-MRwggC4vn5uKatlhgdHmb5yFso5OSWnZ9I_0c98NpCL218ZUzhjOgdaMSsX7Nvi1Qg20rvn-6q4-3Jzd7gtj9-_fjtcH0uUXZtKiUA17xU0qiLk-WzaUSB2oOpGVrIalJJirBH6VsgacESsRxLVWI8olLwqPm7YCaxegpkhXLQHo2-vj3qdcd7VXS_Vk8jaD5s2b_jjTDHp2UQka8GRP0fddi2ve8VlVvabEoOPMdD4By24XkvWJ_1XyXotWXOlc8nZe9i8lLd-MhR0REMOaTCBMOnBm_-g_Aa8cbym</recordid><startdate>20101001</startdate><enddate>20101001</enddate><creator>Omrani, A. 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Dakhlaoui</creatorcontrib><creatorcontrib>Bousnina, M.A.</creatorcontrib><creatorcontrib>Smiri, L.S.</creatorcontrib><creatorcontrib>Taibi, M.</creatorcontrib><creatorcontrib>Leone, P.</creatorcontrib><creatorcontrib>Schoenstein, F.</creatorcontrib><creatorcontrib>Jouini, N.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials 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><collection>Hyper Article en Ligne (HAL)</collection><jtitle>Materials chemistry and physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Omrani, A. Dakhlaoui</au><au>Bousnina, M.A.</au><au>Smiri, L.S.</au><au>Taibi, M.</au><au>Leone, P.</au><au>Schoenstein, F.</au><au>Jouini, N.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Elaboration of nickel nanoparticles by modified polyol process and their spark plasma sintering, characterization and magnetic properties of the nanoparticles and the dense nano-structured material</atitle><jtitle>Materials chemistry and physics</jtitle><date>2010-10-01</date><risdate>2010</risdate><volume>123</volume><issue>2</issue><spage>821</spage><epage>828</epage><pages>821-828</pages><issn>0254-0584</issn><eissn>1879-3312</eissn><abstract>Well crystallized nickel nanoparticles with various diameters were prepared by modified polyol process in the presence of sodium hypophosphite as reducing agent. Dense nano-structured (DNS) samples of these nanopowders were obtained using the spark plasma sintering technique. Magnetic characteristics of the powders and the dense samples were studied through the zero-field-cooling (ZFC)/field-cooling (FC) and the hysteresis measurements. Irreversibility in the (ZFC/FC) curves was observed for all samples and could be interpreted in terms of the unblocking of magnetization for the nanoparticles with diameter below 50
nm and domain wall depinning for the nanoparticles with diameter above 50
nm and for the DNS samples. Compared with bulk nickel, the nanoparticles and the DNS samples exhibited an enhanced coercivity and a decreased saturation magnetization; the relatively elevated value of the coercivity especially for the Ni nanoparticles could be due to their anisotropic morphology and their small size. The low values of the saturation magnetization could result from the inevitable surface oxidation of the powder.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.matchemphys.2010.05.068</doi><tpages>8</tpages></addata></record> |
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| subjects | Chemical synthesis Coercive force Condensed Matter Magnetic properties Materials Science Nanocomposites Nanomaterials Nanoparticles Nanostructure Nickel Physics Polyol Polyols Saturation (magnetic) Spark plasma sintering |
| title | Elaboration of nickel nanoparticles by modified polyol process and their spark plasma sintering, characterization and magnetic properties of the nanoparticles and the dense nano-structured material |
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