Structure and thermal properties of millimeter-scale alumina aerogel beads formed by a modified ball dropping method
We report the formation of millimeter-sized alumina aerogel beads with a modified ball dropping method, in which alumina alcogel beads are formed by extruding an alumina sol containing a small amount of polyvinyl alcohol (PVA) through nozzles into ammonia water, followed by supercritical drying. The...
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| creator | Yu, Yuxi Zhu, Mengwei Fang, Jiyu |
| description | We report the formation of millimeter-sized alumina aerogel beads with a modified ball dropping method, in which alumina alcogel beads are formed by extruding an alumina sol containing a small amount of polyvinyl alcohol (PVA) through nozzles into ammonia water, followed by supercritical drying. The resultant millimeter-sized alumina aerogel beads with the diameter ranging between 1-4 mm have an average pore size of 12-14 nm and specific surface area of 500-600 m
2
g
−1
. They transform from γ-AlO
2
H phase to γ-Al
2
O
3
phase at 400 °C, which remains stable even when the temperature reaches 1200 °C.
We report the formation of alumina aerogel beads with a modified ball dropping method, in which alumina alcogel beads are formed by extruding alumina sol containing a small amount of polyvinyl alcohol through nozzles into ammonia water. |
| doi_str_mv | 10.1039/c6ra26601k |
| format | Article |
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2
g
−1
. They transform from γ-AlO
2
H phase to γ-Al
2
O
3
phase at 400 °C, which remains stable even when the temperature reaches 1200 °C.
We report the formation of alumina aerogel beads with a modified ball dropping method, in which alumina alcogel beads are formed by extruding alumina sol containing a small amount of polyvinyl alcohol through nozzles into ammonia water.</description><identifier>ISSN: 2046-2069</identifier><identifier>EISSN: 2046-2069</identifier><identifier>DOI: 10.1039/c6ra26601k</identifier><language>eng</language><publisher>Cambridge: Royal Society of Chemistry</publisher><subject>Aerogels ; Alumina ; Aluminum oxide ; Ammonia ; Beads ; Drying ; Extrusion ; Nozzles ; Phase transformations ; Phase transitions ; Polyvinyl alcohol ; Polyvinyl alcohols ; Pore size ; Porosity ; Thermodynamic properties ; Transitional aluminas</subject><ispartof>RSC advances, 2017-01, Vol.7 (3), p.154-1545</ispartof><rights>Copyright Royal Society of Chemistry 2017</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c376t-62c9c75cfb8a5779a71a538311177183e2fea8d815b55a591813cf283bac4e9e3</citedby><cites>FETCH-LOGICAL-c376t-62c9c75cfb8a5779a71a538311177183e2fea8d815b55a591813cf283bac4e9e3</cites><orcidid>0000-0002-7337-8982</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,864,27924,27925</link.rule.ids></links><search><creatorcontrib>Yu, Yuxi</creatorcontrib><creatorcontrib>Zhu, Mengwei</creatorcontrib><creatorcontrib>Fang, Jiyu</creatorcontrib><title>Structure and thermal properties of millimeter-scale alumina aerogel beads formed by a modified ball dropping method</title><title>RSC advances</title><description>We report the formation of millimeter-sized alumina aerogel beads with a modified ball dropping method, in which alumina alcogel beads are formed by extruding an alumina sol containing a small amount of polyvinyl alcohol (PVA) through nozzles into ammonia water, followed by supercritical drying. The resultant millimeter-sized alumina aerogel beads with the diameter ranging between 1-4 mm have an average pore size of 12-14 nm and specific surface area of 500-600 m
2
g
−1
. They transform from γ-AlO
2
H phase to γ-Al
2
O
3
phase at 400 °C, which remains stable even when the temperature reaches 1200 °C.
We report the formation of alumina aerogel beads with a modified ball dropping method, in which alumina alcogel beads are formed by extruding alumina sol containing a small amount of polyvinyl alcohol through nozzles into ammonia water.</description><subject>Aerogels</subject><subject>Alumina</subject><subject>Aluminum oxide</subject><subject>Ammonia</subject><subject>Beads</subject><subject>Drying</subject><subject>Extrusion</subject><subject>Nozzles</subject><subject>Phase transformations</subject><subject>Phase transitions</subject><subject>Polyvinyl alcohol</subject><subject>Polyvinyl alcohols</subject><subject>Pore size</subject><subject>Porosity</subject><subject>Thermodynamic properties</subject><subject>Transitional aluminas</subject><issn>2046-2069</issn><issn>2046-2069</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNp9kcFP3TAMxqtpSHsCLrtPyrTLhFSokzZNj-hpA8STJgE7V27qPAJpU5L2wH9PHm9iE4f5Ylv-6ZPtL8s-Q3EKhWjOtAzIpSzg8UO24kUpc17I5uM_9afsOMaHIoWsgEtYZfPtHBY9L4EYjj2b7ykM6NgU_ERhthSZN2ywztmBZgp51OgS6pbBjsiQgt-SYx1hH5nxYaCedc8M2eB7a-yuQ-dYn-QmO25ZErn3_VF2YNBFOv6TD7PfP3_crS_zza-Lq_X5JteilnMuuW50XWnTKazqusEasBJKAEBdgxLEDaHqFVRdVWHVgAKhDVeiQ11SQ-Iw-77XTec8LRTndrBRk3M4kl9iC0qlVwiQZUK_vUMf_BLGtF3LecFBybKsE3Wyp3TwMQYy7RTsgOG5haLdedCu5c35qwfXCf6yh0PUb9xfj9L86__m7dQb8QLUS478</recordid><startdate>20170101</startdate><enddate>20170101</enddate><creator>Yu, Yuxi</creator><creator>Zhu, Mengwei</creator><creator>Fang, Jiyu</creator><general>Royal Society of Chemistry</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>7QF</scope><orcidid>https://orcid.org/0000-0002-7337-8982</orcidid></search><sort><creationdate>20170101</creationdate><title>Structure and thermal properties of millimeter-scale alumina aerogel beads formed by a modified ball dropping method</title><author>Yu, Yuxi ; Zhu, Mengwei ; Fang, Jiyu</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c376t-62c9c75cfb8a5779a71a538311177183e2fea8d815b55a591813cf283bac4e9e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Aerogels</topic><topic>Alumina</topic><topic>Aluminum oxide</topic><topic>Ammonia</topic><topic>Beads</topic><topic>Drying</topic><topic>Extrusion</topic><topic>Nozzles</topic><topic>Phase transformations</topic><topic>Phase transitions</topic><topic>Polyvinyl alcohol</topic><topic>Polyvinyl alcohols</topic><topic>Pore size</topic><topic>Porosity</topic><topic>Thermodynamic properties</topic><topic>Transitional aluminas</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Yu, Yuxi</creatorcontrib><creatorcontrib>Zhu, Mengwei</creatorcontrib><creatorcontrib>Fang, Jiyu</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Aluminium Industry Abstracts</collection><jtitle>RSC advances</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Yu, Yuxi</au><au>Zhu, Mengwei</au><au>Fang, Jiyu</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Structure and thermal properties of millimeter-scale alumina aerogel beads formed by a modified ball dropping method</atitle><jtitle>RSC advances</jtitle><date>2017-01-01</date><risdate>2017</risdate><volume>7</volume><issue>3</issue><spage>154</spage><epage>1545</epage><pages>154-1545</pages><issn>2046-2069</issn><eissn>2046-2069</eissn><abstract>We report the formation of millimeter-sized alumina aerogel beads with a modified ball dropping method, in which alumina alcogel beads are formed by extruding an alumina sol containing a small amount of polyvinyl alcohol (PVA) through nozzles into ammonia water, followed by supercritical drying. The resultant millimeter-sized alumina aerogel beads with the diameter ranging between 1-4 mm have an average pore size of 12-14 nm and specific surface area of 500-600 m
2
g
−1
. They transform from γ-AlO
2
H phase to γ-Al
2
O
3
phase at 400 °C, which remains stable even when the temperature reaches 1200 °C.
We report the formation of alumina aerogel beads with a modified ball dropping method, in which alumina alcogel beads are formed by extruding alumina sol containing a small amount of polyvinyl alcohol through nozzles into ammonia water.</abstract><cop>Cambridge</cop><pub>Royal Society of Chemistry</pub><doi>10.1039/c6ra26601k</doi><tpages>6</tpages><orcidid>https://orcid.org/0000-0002-7337-8982</orcidid><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 2046-2069 |
| ispartof | RSC advances, 2017-01, Vol.7 (3), p.154-1545 |
| issn | 2046-2069 2046-2069 |
| language | eng |
| recordid | cdi_rsc_primary_c6ra26601k |
| source | DOAJ Directory of Open Access Journals; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals |
| subjects | Aerogels Alumina Aluminum oxide Ammonia Beads Drying Extrusion Nozzles Phase transformations Phase transitions Polyvinyl alcohol Polyvinyl alcohols Pore size Porosity Thermodynamic properties Transitional aluminas |
| title | Structure and thermal properties of millimeter-scale alumina aerogel beads formed by a modified ball dropping method |
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