X-ray and Neutron Scattering and Solid State NMR Investigations on Precursor-Derived B−C−N Ceramics Using Isotopic Substitution
Amorphous B−C−N ceramics were produced by thermolysis of poly(borosesquicarbodiimide) of idealized formula [B2(NCN)3] n at 1100 °C in an argon atmosphere. Their structure was investigated by X-ray and neutron diffraction. Wide-angle diffraction showed that the ceramics consist of an amorphous struct...
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| Veröffentlicht in: | Chemistry of materials 2002-07, Vol.14 (7), p.2859-2870 |
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| container_title | Chemistry of materials |
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| creator | Sauter, Dieter Weinmann, Markus Berger, Frank Lamparter, Peter Müller, Klaus Aldinger, Fritz |
| description | Amorphous B−C−N ceramics were produced by thermolysis of poly(borosesquicarbodiimide) of idealized formula [B2(NCN)3] n at 1100 °C in an argon atmosphere. Their structure was investigated by X-ray and neutron diffraction. Wide-angle diffraction showed that the ceramics consist of an amorphous structure with hexagonal planar near-range ordered atomic arrangements similar to graphite. Additionally, magic-angle spinning nuclear magnetic resonance (MAS NMR) studies demonstrated that boron is preferentially trigonally bonded to nitrogen. Small-angle scattering (SAS) experiments revealed that the as-thermolyzed ceramics are inhomogeneous. By combined small-angle X-ray and neutron scattering experiments the medium-range order and its temperature dependency were investigated. Contrast variation studies using isotopic substitution (natN vs 15N) suggest that the ceramics contains sub-microscopic pores. The Guinier radius (R G) of the pores increases upon annealing. Positron annihilation investigations of the ceramics also revealed the presence of nanopores. |
| doi_str_mv | 10.1021/cm011081g |
| format | Article |
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Their structure was investigated by X-ray and neutron diffraction. Wide-angle diffraction showed that the ceramics consist of an amorphous structure with hexagonal planar near-range ordered atomic arrangements similar to graphite. Additionally, magic-angle spinning nuclear magnetic resonance (MAS NMR) studies demonstrated that boron is preferentially trigonally bonded to nitrogen. Small-angle scattering (SAS) experiments revealed that the as-thermolyzed ceramics are inhomogeneous. By combined small-angle X-ray and neutron scattering experiments the medium-range order and its temperature dependency were investigated. Contrast variation studies using isotopic substitution (natN vs 15N) suggest that the ceramics contains sub-microscopic pores. The Guinier radius (R G) of the pores increases upon annealing. Positron annihilation investigations of the ceramics also revealed the presence of nanopores.</description><identifier>ISSN: 0897-4756</identifier><identifier>EISSN: 1520-5002</identifier><identifier>DOI: 10.1021/cm011081g</identifier><language>eng</language><publisher>Washington, DC: American Chemical Society</publisher><subject>Applied sciences ; Building materials. Ceramics. Glasses ; Ceramic industries ; Chemical industry and chemicals ; Exact sciences and technology ; Miscellaneous ; Technical ceramics</subject><ispartof>Chemistry of materials, 2002-07, Vol.14 (7), p.2859-2870</ispartof><rights>Copyright © 2002 American Chemical Society</rights><rights>2002 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a391t-aabe18a3e93d906778bf69d30f218e689ca2e2eba4394cf696a189591d4330d93</citedby><cites>FETCH-LOGICAL-a391t-aabe18a3e93d906778bf69d30f218e689ca2e2eba4394cf696a189591d4330d93</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/cm011081g$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/cm011081g$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,776,780,2752,27053,27901,27902,56713,56763</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=13806911$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Sauter, Dieter</creatorcontrib><creatorcontrib>Weinmann, Markus</creatorcontrib><creatorcontrib>Berger, Frank</creatorcontrib><creatorcontrib>Lamparter, Peter</creatorcontrib><creatorcontrib>Müller, Klaus</creatorcontrib><creatorcontrib>Aldinger, Fritz</creatorcontrib><title>X-ray and Neutron Scattering and Solid State NMR Investigations on Precursor-Derived B−C−N Ceramics Using Isotopic Substitution</title><title>Chemistry of materials</title><addtitle>Chem. Mater</addtitle><description>Amorphous B−C−N ceramics were produced by thermolysis of poly(borosesquicarbodiimide) of idealized formula [B2(NCN)3] n at 1100 °C in an argon atmosphere. Their structure was investigated by X-ray and neutron diffraction. Wide-angle diffraction showed that the ceramics consist of an amorphous structure with hexagonal planar near-range ordered atomic arrangements similar to graphite. Additionally, magic-angle spinning nuclear magnetic resonance (MAS NMR) studies demonstrated that boron is preferentially trigonally bonded to nitrogen. Small-angle scattering (SAS) experiments revealed that the as-thermolyzed ceramics are inhomogeneous. By combined small-angle X-ray and neutron scattering experiments the medium-range order and its temperature dependency were investigated. Contrast variation studies using isotopic substitution (natN vs 15N) suggest that the ceramics contains sub-microscopic pores. The Guinier radius (R G) of the pores increases upon annealing. Positron annihilation investigations of the ceramics also revealed the presence of nanopores.</description><subject>Applied sciences</subject><subject>Building materials. Ceramics. Glasses</subject><subject>Ceramic industries</subject><subject>Chemical industry and chemicals</subject><subject>Exact sciences and technology</subject><subject>Miscellaneous</subject><subject>Technical ceramics</subject><issn>0897-4756</issn><issn>1520-5002</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><recordid>eNptkLFOwzAQhi0EEqUw8AZeGBgCdtwk9giFQqVSKgKCzbo6TuXSJpXtVHRmYeYReRJciujC4LPk-_7PukPomJIzSmJ6ruaEUsLpZAe1aBKTKCEk3kUtwkUWdbIk3UcHzk3Jmop5C72_RBZWGKoCD3XjbV3hXIH32ppq8vOc1zMTqgev8fDuAferpXbeTMCbunI4BEZWq8a62kZXIbbUBb78-vjshjPEXW1hbpTDT24t7Lva1wujcN6Mg8Q3a8kh2ith5vTR791GT73rx-5tNLi_6XcvBhEwQX0EMNaUA9OCFYKkWcbHZSoKRsqYcp1yoSDWsR5Dh4mOCq0UKBeJoEWHMVII1kanG6-ytXNWl3JhzRzsSlIi19uTf9sL7MmGXYBTMCstVMq4bYBxkgpKAxdtOOO8fvvrg32VacayRD6OctnLnx8GVwMhs60XlJPTurFVmPif_78BBNqNTA</recordid><startdate>20020715</startdate><enddate>20020715</enddate><creator>Sauter, Dieter</creator><creator>Weinmann, Markus</creator><creator>Berger, Frank</creator><creator>Lamparter, Peter</creator><creator>Müller, Klaus</creator><creator>Aldinger, Fritz</creator><general>American Chemical Society</general><scope>BSCLL</scope><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>20020715</creationdate><title>X-ray and Neutron Scattering and Solid State NMR Investigations on Precursor-Derived B−C−N Ceramics Using Isotopic Substitution</title><author>Sauter, Dieter ; Weinmann, Markus ; Berger, Frank ; Lamparter, Peter ; Müller, Klaus ; Aldinger, Fritz</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a391t-aabe18a3e93d906778bf69d30f218e689ca2e2eba4394cf696a189591d4330d93</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2002</creationdate><topic>Applied sciences</topic><topic>Building materials. Ceramics. Glasses</topic><topic>Ceramic industries</topic><topic>Chemical industry and chemicals</topic><topic>Exact sciences and technology</topic><topic>Miscellaneous</topic><topic>Technical ceramics</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sauter, Dieter</creatorcontrib><creatorcontrib>Weinmann, Markus</creatorcontrib><creatorcontrib>Berger, Frank</creatorcontrib><creatorcontrib>Lamparter, Peter</creatorcontrib><creatorcontrib>Müller, Klaus</creatorcontrib><creatorcontrib>Aldinger, Fritz</creatorcontrib><collection>Istex</collection><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Chemistry of materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sauter, Dieter</au><au>Weinmann, Markus</au><au>Berger, Frank</au><au>Lamparter, Peter</au><au>Müller, Klaus</au><au>Aldinger, Fritz</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>X-ray and Neutron Scattering and Solid State NMR Investigations on Precursor-Derived B−C−N Ceramics Using Isotopic Substitution</atitle><jtitle>Chemistry of materials</jtitle><addtitle>Chem. Mater</addtitle><date>2002-07-15</date><risdate>2002</risdate><volume>14</volume><issue>7</issue><spage>2859</spage><epage>2870</epage><pages>2859-2870</pages><issn>0897-4756</issn><eissn>1520-5002</eissn><abstract>Amorphous B−C−N ceramics were produced by thermolysis of poly(borosesquicarbodiimide) of idealized formula [B2(NCN)3] n at 1100 °C in an argon atmosphere. Their structure was investigated by X-ray and neutron diffraction. Wide-angle diffraction showed that the ceramics consist of an amorphous structure with hexagonal planar near-range ordered atomic arrangements similar to graphite. Additionally, magic-angle spinning nuclear magnetic resonance (MAS NMR) studies demonstrated that boron is preferentially trigonally bonded to nitrogen. Small-angle scattering (SAS) experiments revealed that the as-thermolyzed ceramics are inhomogeneous. By combined small-angle X-ray and neutron scattering experiments the medium-range order and its temperature dependency were investigated. Contrast variation studies using isotopic substitution (natN vs 15N) suggest that the ceramics contains sub-microscopic pores. The Guinier radius (R G) of the pores increases upon annealing. Positron annihilation investigations of the ceramics also revealed the presence of nanopores.</abstract><cop>Washington, DC</cop><pub>American Chemical Society</pub><doi>10.1021/cm011081g</doi><tpages>12</tpages></addata></record> |
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| source | ACS Publications |
| subjects | Applied sciences Building materials. Ceramics. Glasses Ceramic industries Chemical industry and chemicals Exact sciences and technology Miscellaneous Technical ceramics |
| title | X-ray and Neutron Scattering and Solid State NMR Investigations on Precursor-Derived B−C−N Ceramics Using Isotopic Substitution |
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