The kinetic study of the synthesis of magnesium aluminate spinel from mechanochemically treated mixtures of oxide-hydroxide
The kinetics of solid-state reaction of magnesium aluminate (MA) spinel formation from the mechanically activated mixtures of both Mg and Al oxides and hydroxides was studied in situ by high-temperature XRD at elevated temperatures. The degree of conversion alpha of the MA spinel formation was deter...
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| Veröffentlicht in: | Journal of materials science 2004-08, Vol.39 (16-17), p.5403-5405 |
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| creator | KRIL'OVA, L STEVULOVA, N |
| description | The kinetics of solid-state reaction of magnesium aluminate (MA) spinel formation from the mechanically activated mixtures of both Mg and Al oxides and hydroxides was studied in situ by high-temperature XRD at elevated temperatures. The degree of conversion alpha of the MA spinel formation was determined by the Rietveld method. The dependence of the conversion degree of the MA spinel formation on the time of isothermal heating of the particular mixtures was studied. Time dependence alpha(t) of the crystalline MgAl2O4 formation at the temperature T was analysed by the equation corresponding to the first order kinetics alpha(t) = P1.[1-P2.exp(-k.t)], where P1, P2, and k are the parameters. The rate constants k and the activation energies of the crystalline MgAl2O4 formation for the selected mixtures were calculated by fitting the kinetic data. Comparison of acquired data shows that the most beneficial results for MA spinel synthesis were obtained from the mechanically activated hydroxide mixture Mg(OH)2 + Al(OH)3. 4 refs. |
| doi_str_mv | 10.1023/B:JMSC.0000039254.95960.e8 |
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The degree of conversion alpha of the MA spinel formation was determined by the Rietveld method. The dependence of the conversion degree of the MA spinel formation on the time of isothermal heating of the particular mixtures was studied. Time dependence alpha(t) of the crystalline MgAl2O4 formation at the temperature T was analysed by the equation corresponding to the first order kinetics alpha(t) = P1.[1-P2.exp(-k.t)], where P1, P2, and k are the parameters. The rate constants k and the activation energies of the crystalline MgAl2O4 formation for the selected mixtures were calculated by fitting the kinetic data. Comparison of acquired data shows that the most beneficial results for MA spinel synthesis were obtained from the mechanically activated hydroxide mixture Mg(OH)2 + Al(OH)3. 4 refs.</description><identifier>ISSN: 0022-2461</identifier><identifier>EISSN: 1573-4803</identifier><identifier>DOI: 10.1023/B:JMSC.0000039254.95960.e8</identifier><identifier>CODEN: JMTSAS</identifier><language>eng</language><publisher>Heidelberg: Springer</publisher><subject>Aluminum ; Chemistry ; Conversion ; Cross-disciplinary physics: materials science; rheology ; Crystal structure ; Crystallinity ; Data acquisition ; Exact sciences and technology ; High temperature ; Hydroxides ; Inorganic chemistry and origins of life ; Kinetics and mechanism of reactions ; Machining, milling ; Magnesium aluminate ; Materials science ; Materials synthesis; materials processing ; Physics ; Rate constants ; Reaction kinetics ; Rietveld method ; Spinel ; Synthesis ; Time dependence ; X-ray diffraction</subject><ispartof>Journal of materials science, 2004-08, Vol.39 (16-17), p.5403-5405</ispartof><rights>2005 INIST-CNRS</rights><rights>Journal of Materials Science is a copyright of Springer, (2004). All Rights Reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c443t-63e4ee90f015418b28b9ef70c9388f10d0c2aa1b0c59f6219885fa2baaef57a23</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>309,310,314,780,784,789,790,23930,23931,25140,27924,27925</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=16132847$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>KRIL'OVA, L</creatorcontrib><creatorcontrib>STEVULOVA, N</creatorcontrib><title>The kinetic study of the synthesis of magnesium aluminate spinel from mechanochemically treated mixtures of oxide-hydroxide</title><title>Journal of materials science</title><description>The kinetics of solid-state reaction of magnesium aluminate (MA) spinel formation from the mechanically activated mixtures of both Mg and Al oxides and hydroxides was studied in situ by high-temperature XRD at elevated temperatures. The degree of conversion alpha of the MA spinel formation was determined by the Rietveld method. The dependence of the conversion degree of the MA spinel formation on the time of isothermal heating of the particular mixtures was studied. Time dependence alpha(t) of the crystalline MgAl2O4 formation at the temperature T was analysed by the equation corresponding to the first order kinetics alpha(t) = P1.[1-P2.exp(-k.t)], where P1, P2, and k are the parameters. The rate constants k and the activation energies of the crystalline MgAl2O4 formation for the selected mixtures were calculated by fitting the kinetic data. Comparison of acquired data shows that the most beneficial results for MA spinel synthesis were obtained from the mechanically activated hydroxide mixture Mg(OH)2 + Al(OH)3. 4 refs.</description><subject>Aluminum</subject><subject>Chemistry</subject><subject>Conversion</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Crystal structure</subject><subject>Crystallinity</subject><subject>Data acquisition</subject><subject>Exact sciences and technology</subject><subject>High temperature</subject><subject>Hydroxides</subject><subject>Inorganic chemistry and origins of life</subject><subject>Kinetics and mechanism of reactions</subject><subject>Machining, milling</subject><subject>Magnesium aluminate</subject><subject>Materials science</subject><subject>Materials synthesis; materials processing</subject><subject>Physics</subject><subject>Rate constants</subject><subject>Reaction kinetics</subject><subject>Rietveld method</subject><subject>Spinel</subject><subject>Synthesis</subject><subject>Time dependence</subject><subject>X-ray diffraction</subject><issn>0022-2461</issn><issn>1573-4803</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2004</creationdate><recordtype>article</recordtype><sourceid>AFKRA</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><recordid>eNqNkk1vFDEMhiMEEsvCf4hAcJsl35P0RldAi1r1QDlH2YzDpszHksxIHfXPk9lWqsSlzcWW9fh1ZL8IvadkQwnjn09Pflz-3G7I8rhhUmyMNIpsQL9AKyprXglN-Eu0IoSxiglFX6M3Od8UXNaMrtDd9R7wn9jDGD3O49TMeAh4LMU89yXkmJdC5373JZ867Nqpi70bC3AobS0OaehwB37v-sHvoYvete2MxwQFanAXb8cpwVFluI0NVPu5ScfsLXoVXJvh3UNco1_fvl5vz6qLq-_n2y8XlReCj5XiIAAMCYRKQfWO6Z2BUBNvuNaBkoZ45hzdES9NUIwarWVwbOccBFk7xtfo073uIQ1_J8ij7WL20Lauh2HKlhlVK03MM0AmtWDyaVALIZVSzwAZJYIsih_-A2-GKfVlLZaxctK6rssy1ujknvJpyDlBsIcUO5dmS4ldDGFP7WII-2gIezSEBV2aPz6McLncKCTX-5gfFRTl5d81_wc23riw</recordid><startdate>20040801</startdate><enddate>20040801</enddate><creator>KRIL'OVA, L</creator><creator>STEVULOVA, N</creator><general>Springer</general><general>Springer Nature B.V</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>AFKRA</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>L6V</scope><scope>M7S</scope><scope>PDBOC</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PRINS</scope><scope>PTHSS</scope><scope>7QQ</scope><scope>8FD</scope><scope>JG9</scope><scope>7SC</scope><scope>7SR</scope><scope>JQ2</scope><scope>L7M</scope><scope>L~C</scope><scope>L~D</scope><scope>7QF</scope><scope>7TB</scope><scope>FR3</scope></search><sort><creationdate>20040801</creationdate><title>The kinetic study of the synthesis of magnesium aluminate spinel from mechanochemically treated mixtures of oxide-hydroxide</title><author>KRIL'OVA, L ; STEVULOVA, N</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c443t-63e4ee90f015418b28b9ef70c9388f10d0c2aa1b0c59f6219885fa2baaef57a23</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2004</creationdate><topic>Aluminum</topic><topic>Chemistry</topic><topic>Conversion</topic><topic>Cross-disciplinary physics: materials science; rheology</topic><topic>Crystal structure</topic><topic>Crystallinity</topic><topic>Data acquisition</topic><topic>Exact sciences and technology</topic><topic>High temperature</topic><topic>Hydroxides</topic><topic>Inorganic chemistry and origins of life</topic><topic>Kinetics and mechanism of reactions</topic><topic>Machining, milling</topic><topic>Magnesium aluminate</topic><topic>Materials science</topic><topic>Materials synthesis; materials processing</topic><topic>Physics</topic><topic>Rate constants</topic><topic>Reaction kinetics</topic><topic>Rietveld method</topic><topic>Spinel</topic><topic>Synthesis</topic><topic>Time dependence</topic><topic>X-ray diffraction</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>KRIL'OVA, L</creatorcontrib><creatorcontrib>STEVULOVA, N</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>ProQuest SciTech Collection</collection><collection>ProQuest Technology Collection</collection><collection>Materials Science & Engineering Collection</collection><collection>ProQuest Central</collection><collection>AUTh Library subscriptions: ProQuest Central</collection><collection>Technology Collection</collection><collection>ProQuest One Community College</collection><collection>ProQuest Materials Science Collection</collection><collection>ProQuest Central</collection><collection>SciTech Premium Collection (Proquest) (PQ_SDU_P3)</collection><collection>Materials Science Database</collection><collection>ProQuest Engineering Collection</collection><collection>Engineering Database</collection><collection>Materials Science Collection</collection><collection>ProQuest One Academic Eastern Edition (DO NOT USE)</collection><collection>ProQuest One Academic</collection><collection>ProQuest One Academic UKI Edition</collection><collection>ProQuest Central China</collection><collection>Engineering Collection</collection><collection>Ceramic Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Computer and Information Systems Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>ProQuest Computer Science Collection</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Computer and Information Systems Abstracts Academic</collection><collection>Computer and Information Systems Abstracts Professional</collection><collection>Aluminium Industry Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Engineering Research Database</collection><jtitle>Journal of materials science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>KRIL'OVA, L</au><au>STEVULOVA, N</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>The kinetic study of the synthesis of magnesium aluminate spinel from mechanochemically treated mixtures of oxide-hydroxide</atitle><jtitle>Journal of materials science</jtitle><date>2004-08-01</date><risdate>2004</risdate><volume>39</volume><issue>16-17</issue><spage>5403</spage><epage>5405</epage><pages>5403-5405</pages><issn>0022-2461</issn><eissn>1573-4803</eissn><coden>JMTSAS</coden><abstract>The kinetics of solid-state reaction of magnesium aluminate (MA) spinel formation from the mechanically activated mixtures of both Mg and Al oxides and hydroxides was studied in situ by high-temperature XRD at elevated temperatures. The degree of conversion alpha of the MA spinel formation was determined by the Rietveld method. The dependence of the conversion degree of the MA spinel formation on the time of isothermal heating of the particular mixtures was studied. Time dependence alpha(t) of the crystalline MgAl2O4 formation at the temperature T was analysed by the equation corresponding to the first order kinetics alpha(t) = P1.[1-P2.exp(-k.t)], where P1, P2, and k are the parameters. The rate constants k and the activation energies of the crystalline MgAl2O4 formation for the selected mixtures were calculated by fitting the kinetic data. Comparison of acquired data shows that the most beneficial results for MA spinel synthesis were obtained from the mechanically activated hydroxide mixture Mg(OH)2 + Al(OH)3. 4 refs.</abstract><cop>Heidelberg</cop><pub>Springer</pub><doi>10.1023/B:JMSC.0000039254.95960.e8</doi><tpages>3</tpages></addata></record> |
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| subjects | Aluminum Chemistry Conversion Cross-disciplinary physics: materials science rheology Crystal structure Crystallinity Data acquisition Exact sciences and technology High temperature Hydroxides Inorganic chemistry and origins of life Kinetics and mechanism of reactions Machining, milling Magnesium aluminate Materials science Materials synthesis materials processing Physics Rate constants Reaction kinetics Rietveld method Spinel Synthesis Time dependence X-ray diffraction |
| title | The kinetic study of the synthesis of magnesium aluminate spinel from mechanochemically treated mixtures of oxide-hydroxide |
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