Sol-gel alumina fibre mats for high-temperature applications
Polycrystalline, high-alumina fibre mats (with 4 wt.% SiO 2), for application as high-temperature thermal insulation materials having a web-like structure, were fabricated in situ by a single-step sol-gel spinning technique using a multi-orifice spinneret. Strong and resilient fibres with diameters...
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| Veröffentlicht in: | Materials letters 2002-11, Vol.57 (1), p.87-93 |
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| container_title | Materials letters |
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| creator | Chatterjee, M Naskar, M.K Chakrabarty, P.K Ganguli, D |
| description | Polycrystalline, high-alumina fibre mats (with 4 wt.% SiO
2), for application as high-temperature thermal insulation materials having a web-like structure, were fabricated in situ by a single-step sol-gel spinning technique using a multi-orifice spinneret. Strong and resilient fibres with diameters in the range 3–10 μm were obtained from spinnable alumina–silica sols devoid of organics as the binder aid. Incorporation of 4 wt.% SiO
2 as an additive increased the stability of the metastable transition alumina phases, which helped to increase the strength of the fibre mats. The mats exhibited a small linear shrinkage of about 2.75% at 1600 °C. Disintegration of the mats was also found to be negligible (about 2.25 wt.%) at 1600 °C. The health hazard involved with airborne fibres was drastically minimised in the developed fibre mats by applying sol-gel coatings on their surfaces and subsequent calcination at 1200 °C. The oxide-coated fibres exhibited coherent coatings by anchoring loose surface fibres in a network of alumina. |
| doi_str_mv | 10.1016/S0167-577X(02)00704-8 |
| format | Article |
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2), for application as high-temperature thermal insulation materials having a web-like structure, were fabricated in situ by a single-step sol-gel spinning technique using a multi-orifice spinneret. Strong and resilient fibres with diameters in the range 3–10 μm were obtained from spinnable alumina–silica sols devoid of organics as the binder aid. Incorporation of 4 wt.% SiO
2 as an additive increased the stability of the metastable transition alumina phases, which helped to increase the strength of the fibre mats. The mats exhibited a small linear shrinkage of about 2.75% at 1600 °C. Disintegration of the mats was also found to be negligible (about 2.25 wt.%) at 1600 °C. The health hazard involved with airborne fibres was drastically minimised in the developed fibre mats by applying sol-gel coatings on their surfaces and subsequent calcination at 1200 °C. The oxide-coated fibres exhibited coherent coatings by anchoring loose surface fibres in a network of alumina.</description><identifier>ISSN: 0167-577X</identifier><identifier>EISSN: 1873-4979</identifier><identifier>DOI: 10.1016/S0167-577X(02)00704-8</identifier><identifier>CODEN: MLETDJ</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Applied sciences ; Building materials. Ceramics. Glasses ; Ceramic and carbon fibers ; Ceramic industries ; Chemical industry and chemicals ; Exact sciences and technology ; Fibre mats ; High alumina fibres ; Sol-gel process ; Technical ceramics</subject><ispartof>Materials letters, 2002-11, Vol.57 (1), p.87-93</ispartof><rights>2002</rights><rights>2003 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c399t-379eb95b16592ca7c4b675d100ea0c09829772889ee61e668b0f617f455986c63</citedby><cites>FETCH-LOGICAL-c399t-379eb95b16592ca7c4b675d100ea0c09829772889ee61e668b0f617f455986c63</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/S0167-577X(02)00704-8$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3548,27923,27924,45994</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=13990778$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><contributor>WCA</contributor><creatorcontrib>Chatterjee, M</creatorcontrib><creatorcontrib>Naskar, M.K</creatorcontrib><creatorcontrib>Chakrabarty, P.K</creatorcontrib><creatorcontrib>Ganguli, D</creatorcontrib><title>Sol-gel alumina fibre mats for high-temperature applications</title><title>Materials letters</title><description>Polycrystalline, high-alumina fibre mats (with 4 wt.% SiO
2), for application as high-temperature thermal insulation materials having a web-like structure, were fabricated in situ by a single-step sol-gel spinning technique using a multi-orifice spinneret. Strong and resilient fibres with diameters in the range 3–10 μm were obtained from spinnable alumina–silica sols devoid of organics as the binder aid. Incorporation of 4 wt.% SiO
2 as an additive increased the stability of the metastable transition alumina phases, which helped to increase the strength of the fibre mats. The mats exhibited a small linear shrinkage of about 2.75% at 1600 °C. Disintegration of the mats was also found to be negligible (about 2.25 wt.%) at 1600 °C. The health hazard involved with airborne fibres was drastically minimised in the developed fibre mats by applying sol-gel coatings on their surfaces and subsequent calcination at 1200 °C. The oxide-coated fibres exhibited coherent coatings by anchoring loose surface fibres in a network of alumina.</description><subject>Applied sciences</subject><subject>Building materials. Ceramics. Glasses</subject><subject>Ceramic and carbon fibers</subject><subject>Ceramic industries</subject><subject>Chemical industry and chemicals</subject><subject>Exact sciences and technology</subject><subject>Fibre mats</subject><subject>High alumina fibres</subject><subject>Sol-gel process</subject><subject>Technical ceramics</subject><issn>0167-577X</issn><issn>1873-4979</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2002</creationdate><recordtype>article</recordtype><recordid>eNqNkEtLAzEQx4MoWKsfQdiLoofoZB95gCBSfEHBQxW8hWw620b2ZbIr-O3dbUWPepk5zO8_w_wIOWZwwYDxy8VQBM2EeD2D-BxAQErlDpkwKRKaKqF2yeQH2ScHIbwBQKognZCrRVPSFZaRKfvK1SYqXO4xqkwXoqLx0dqt1rTDqkVvun6YmLYtnTWda-pwSPYKUwY8-u5T8nJ3-zx7oPOn-8fZzZzaRKmOJkJhrrKc8UzF1gib5lxkSwaABiwoGSshYikVImfIucyh4EwUaZYpyS1PpuR0u7f1zXuPodOVCxbL0tTY9EHHQrCUSflPMBnBbAta34TgsdCtd5Xxn5qBHqXqjVQ9GtMQ641UPeZOvg-YYE1ZeFNbF37Dw78gxMhdbzkctHw49DpYh7XFpfNoO71s3B-XvgDtfYpa</recordid><startdate>20021101</startdate><enddate>20021101</enddate><creator>Chatterjee, M</creator><creator>Naskar, M.K</creator><creator>Chakrabarty, P.K</creator><creator>Ganguli, D</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7QQ</scope><scope>8FD</scope><scope>JG9</scope><scope>7SR</scope></search><sort><creationdate>20021101</creationdate><title>Sol-gel alumina fibre mats for high-temperature applications</title><author>Chatterjee, M ; Naskar, M.K ; Chakrabarty, P.K ; Ganguli, D</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c399t-379eb95b16592ca7c4b675d100ea0c09829772889ee61e668b0f617f455986c63</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 and carbon fibers</topic><topic>Ceramic industries</topic><topic>Chemical industry and chemicals</topic><topic>Exact sciences and technology</topic><topic>Fibre mats</topic><topic>High alumina fibres</topic><topic>Sol-gel process</topic><topic>Technical ceramics</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chatterjee, M</creatorcontrib><creatorcontrib>Naskar, M.K</creatorcontrib><creatorcontrib>Chakrabarty, P.K</creatorcontrib><creatorcontrib>Ganguli, D</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Ceramic Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Engineered Materials Abstracts</collection><jtitle>Materials letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chatterjee, M</au><au>Naskar, M.K</au><au>Chakrabarty, P.K</au><au>Ganguli, D</au><au>WCA</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Sol-gel alumina fibre mats for high-temperature applications</atitle><jtitle>Materials letters</jtitle><date>2002-11-01</date><risdate>2002</risdate><volume>57</volume><issue>1</issue><spage>87</spage><epage>93</epage><pages>87-93</pages><issn>0167-577X</issn><eissn>1873-4979</eissn><coden>MLETDJ</coden><abstract>Polycrystalline, high-alumina fibre mats (with 4 wt.% SiO
2), for application as high-temperature thermal insulation materials having a web-like structure, were fabricated in situ by a single-step sol-gel spinning technique using a multi-orifice spinneret. Strong and resilient fibres with diameters in the range 3–10 μm were obtained from spinnable alumina–silica sols devoid of organics as the binder aid. Incorporation of 4 wt.% SiO
2 as an additive increased the stability of the metastable transition alumina phases, which helped to increase the strength of the fibre mats. The mats exhibited a small linear shrinkage of about 2.75% at 1600 °C. Disintegration of the mats was also found to be negligible (about 2.25 wt.%) at 1600 °C. The health hazard involved with airborne fibres was drastically minimised in the developed fibre mats by applying sol-gel coatings on their surfaces and subsequent calcination at 1200 °C. The oxide-coated fibres exhibited coherent coatings by anchoring loose surface fibres in a network of alumina.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/S0167-577X(02)00704-8</doi><tpages>7</tpages></addata></record> |
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| identifier | ISSN: 0167-577X |
| ispartof | Materials letters, 2002-11, Vol.57 (1), p.87-93 |
| issn | 0167-577X 1873-4979 |
| language | eng |
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| source | ScienceDirect Journals (5 years ago - present) |
| subjects | Applied sciences Building materials. Ceramics. Glasses Ceramic and carbon fibers Ceramic industries Chemical industry and chemicals Exact sciences and technology Fibre mats High alumina fibres Sol-gel process Technical ceramics |
| title | Sol-gel alumina fibre mats for high-temperature applications |
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