The Effect of Lithium Doping on the Sintering and Grain Growth of SPS-Processed, Non-Stoichiometric Magnesium Aluminate Spinel
The effects of lithium doping on the sintering and grain growth of non-stoichiometric nano-sized magnesium aluminate spinel were studied using a spark plasma sintering (SPS) apparatus. Li-doped nano-MgO· Al₂O₃ spinel ( = 1.06 and 1.21) powders containing 0, 0.20, 0.50 or 1.00 at. % Li were synthesiz...
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| Veröffentlicht in: | Materials 2016-06, Vol.9 (6), p.481 |
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| creator | Mordekovitz, Yuval Shelly, Lee Halabi, Mahdi Kalabukhov, Sergey Hayun, Shmuel |
| description | The effects of lithium doping on the sintering and grain growth of non-stoichiometric nano-sized magnesium aluminate spinel were studied using a spark plasma sintering (SPS) apparatus. Li-doped nano-MgO·
Al₂O₃ spinel (
= 1.06 and 1.21) powders containing 0, 0.20, 0.50 or 1.00 at. % Li were synthesized by the solution combustion method and dense specimens were processed using a SPS apparatus at 1200 °C and under an applied pressure of 150 MPa. The SPS-processed samples showed mutual dependency on the lithium concentration and the alumina-to-magnesia ratio. For example, the density and hardness values of near-stoichiometry samples (
= 1.06) showed an incline up to 0.51 at. % Li, while in the alumina rich samples (
= 1.21), these values remained constant up to 0.53 at. % Li. Studying grain growth revealed that in the Li-MgO·
Al₂O₃ system, grain growth is limited by Zener pining. The activation energies of undoped, 0.2 and 0.53 at. % Li-MgO·1.21Al₂O₃ samples were 288 ± 40, 670 ± 45 and 543 ± 40 kJ·mol
, respectively. |
| doi_str_mv | 10.3390/ma9060481 |
| format | Article |
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Al₂O₃ spinel (
= 1.06 and 1.21) powders containing 0, 0.20, 0.50 or 1.00 at. % Li were synthesized by the solution combustion method and dense specimens were processed using a SPS apparatus at 1200 °C and under an applied pressure of 150 MPa. The SPS-processed samples showed mutual dependency on the lithium concentration and the alumina-to-magnesia ratio. For example, the density and hardness values of near-stoichiometry samples (
= 1.06) showed an incline up to 0.51 at. % Li, while in the alumina rich samples (
= 1.21), these values remained constant up to 0.53 at. % Li. Studying grain growth revealed that in the Li-MgO·
Al₂O₃ system, grain growth is limited by Zener pining. The activation energies of undoped, 0.2 and 0.53 at. % Li-MgO·1.21Al₂O₃ samples were 288 ± 40, 670 ± 45 and 543 ± 40 kJ·mol
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Al₂O₃ spinel (
= 1.06 and 1.21) powders containing 0, 0.20, 0.50 or 1.00 at. % Li were synthesized by the solution combustion method and dense specimens were processed using a SPS apparatus at 1200 °C and under an applied pressure of 150 MPa. The SPS-processed samples showed mutual dependency on the lithium concentration and the alumina-to-magnesia ratio. For example, the density and hardness values of near-stoichiometry samples (
= 1.06) showed an incline up to 0.51 at. % Li, while in the alumina rich samples (
= 1.21), these values remained constant up to 0.53 at. % Li. Studying grain growth revealed that in the Li-MgO·
Al₂O₃ system, grain growth is limited by Zener pining. The activation energies of undoped, 0.2 and 0.53 at. % Li-MgO·1.21Al₂O₃ samples were 288 ± 40, 670 ± 45 and 543 ± 40 kJ·mol
, respectively.</description><issn>1996-1944</issn><issn>1996-1944</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNpVkUtP3DAUha2qqCBg0T9QeQlS0_qRieMNEqJAKw0Uaeja8jjXE1eJPdgOqJv-dhxBR9QLv-6537F1EPpIyRfOJfk6akkaUrf0HTqgUjYVlXX9_s1-Hx2n9JuUwTltmfyA9lkrBC9NB-jvfQ_40lowGQeLly73bhrxt7B1foODx7nUV85niPOF9h2-jtr5Moen3M89q7tVdReDgZSg-4xvg69WOTjTuzBCjs7gG73xkGbu-TCNzutcmMUAhiO0Z_WQ4Ph1PUS_ri7vL75Xy5_XPy7Ol5XhYpGrllnOieF1B8RIu9bS1NwK0gqzoA2tW8a4bspn6XzqgK-tZK0VLROCNSD4ITp74W6n9QidAZ-jHtQ2ulHHPypop_6veNerTXhUi3rRCCkL4OQVEMPDBCmr0SUDw6A9hCkpKlnTFDtGi_T0RWpiSCmC3dlQoubI1C6yov309l075b-A-DNwsZGo</recordid><startdate>20160616</startdate><enddate>20160616</enddate><creator>Mordekovitz, Yuval</creator><creator>Shelly, Lee</creator><creator>Halabi, Mahdi</creator><creator>Kalabukhov, Sergey</creator><creator>Hayun, Shmuel</creator><general>MDPI</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7X8</scope><scope>5PM</scope><orcidid>https://orcid.org/0000-0003-2179-5984</orcidid></search><sort><creationdate>20160616</creationdate><title>The Effect of Lithium Doping on the Sintering and Grain Growth of SPS-Processed, Non-Stoichiometric Magnesium Aluminate Spinel</title><author>Mordekovitz, Yuval ; Shelly, Lee ; Halabi, Mahdi ; Kalabukhov, Sergey ; Hayun, Shmuel</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c375t-82f330c34de0c9fba9c43f7087c516148223a619411614de3bf928f7827726e73</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mordekovitz, Yuval</creatorcontrib><creatorcontrib>Shelly, Lee</creatorcontrib><creatorcontrib>Halabi, Mahdi</creatorcontrib><creatorcontrib>Kalabukhov, Sergey</creatorcontrib><creatorcontrib>Hayun, Shmuel</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>MEDLINE - Academic</collection><collection>PubMed Central (Full Participant titles)</collection><jtitle>Materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Mordekovitz, Yuval</au><au>Shelly, Lee</au><au>Halabi, Mahdi</au><au>Kalabukhov, Sergey</au><au>Hayun, Shmuel</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The Effect of Lithium Doping on the Sintering and Grain Growth of SPS-Processed, Non-Stoichiometric Magnesium Aluminate Spinel</atitle><jtitle>Materials</jtitle><addtitle>Materials (Basel)</addtitle><date>2016-06-16</date><risdate>2016</risdate><volume>9</volume><issue>6</issue><spage>481</spage><pages>481-</pages><issn>1996-1944</issn><eissn>1996-1944</eissn><abstract>The effects of lithium doping on the sintering and grain growth of non-stoichiometric nano-sized magnesium aluminate spinel were studied using a spark plasma sintering (SPS) apparatus. Li-doped nano-MgO·
Al₂O₃ spinel (
= 1.06 and 1.21) powders containing 0, 0.20, 0.50 or 1.00 at. % Li were synthesized by the solution combustion method and dense specimens were processed using a SPS apparatus at 1200 °C and under an applied pressure of 150 MPa. The SPS-processed samples showed mutual dependency on the lithium concentration and the alumina-to-magnesia ratio. For example, the density and hardness values of near-stoichiometry samples (
= 1.06) showed an incline up to 0.51 at. % Li, while in the alumina rich samples (
= 1.21), these values remained constant up to 0.53 at. % Li. Studying grain growth revealed that in the Li-MgO·
Al₂O₃ system, grain growth is limited by Zener pining. The activation energies of undoped, 0.2 and 0.53 at. % Li-MgO·1.21Al₂O₃ samples were 288 ± 40, 670 ± 45 and 543 ± 40 kJ·mol
, respectively.</abstract><cop>Switzerland</cop><pub>MDPI</pub><pmid>28773604</pmid><doi>10.3390/ma9060481</doi><orcidid>https://orcid.org/0000-0003-2179-5984</orcidid><oa>free_for_read</oa></addata></record> |
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| title | The Effect of Lithium Doping on the Sintering and Grain Growth of SPS-Processed, Non-Stoichiometric Magnesium Aluminate Spinel |
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