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Article: Nano-indentation on nickel aluminate spinel and the influence of acid and alkaline attacks on the spinel surface

TitleNano-indentation on nickel aluminate spinel and the influence of acid and alkaline attacks on the spinel surface
Authors
KeywordsAcidic/alkaline attack
Alkaline attack
Alkaline solutions
Alumina precursor
Aluminate spinel
Issue Date2012
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/ceramint
Citation
Ceramics International, 2012, v. 38 n. 4, p. 3121-3128 How to Cite?
AbstractNickel aluminate spinel phase was successfully sintered from the thermal reactions between nickel oxide and kaolinite or γ-alumina precursor, to simulate the stabilization mechanism of hazardous metal-bearing waste by ceramic matrix. The product phases were then tested using nano-indentation to obtain their nanohardness and Young's modulus, as a means to evaluate the properties of the product after incorporating the waste material. The results indicate the beneficial effect of forming aluminate spinel phase in the system due to its superior mechanical properties. A higher sintering temperature was found to enhance crystal growth in the spinel phase, together with its nanohardness and modulus. The minimum temperature for fabricating nickel aluminate spinel with a surface property comparable to ceramic materials was found to be 1200 °C, although the initiation of the spinel phase can be achieved at a lower temperature. Nano-indentation experiments performed on the spinel-containing samples leached by strong acid and alkaline solutions reveal the superiority of nickel aluminate spinel in resisting acid and alkaline attack and also suggest a reliable mechanism for hosting hazardous nickel in the crystal structure. © 2011 Elsevier Ltd and Techna Group S.r.l.
Persistent Identifierhttp://hdl.handle.net/10722/150661
ISSN
2015 Impact Factor: 2.758
2015 SCImago Journal Rankings: 0.865
ISI Accession Number ID
Funding AgencyGrant Number
Research Grants Council of Hong KongHKU 716310E
University Grants Council of Hong KongSEG_HKU10
Funding Information:

This work was supported by Research Grants Council of Hong Kong (HKU 716310E) and Special Equipment Grant (SEG_HKU10) from University Grants Council of Hong Kong.

References
Grants

 

DC FieldValueLanguage
dc.contributor.authorHe, Yen_US
dc.contributor.authorShih, Ken_US
dc.date.accessioned2012-06-26T06:06:32Z-
dc.date.available2012-06-26T06:06:32Z-
dc.date.issued2012en_US
dc.identifier.citationCeramics International, 2012, v. 38 n. 4, p. 3121-3128en_US
dc.identifier.issn0272-8842en_US
dc.identifier.urihttp://hdl.handle.net/10722/150661-
dc.description.abstractNickel aluminate spinel phase was successfully sintered from the thermal reactions between nickel oxide and kaolinite or γ-alumina precursor, to simulate the stabilization mechanism of hazardous metal-bearing waste by ceramic matrix. The product phases were then tested using nano-indentation to obtain their nanohardness and Young's modulus, as a means to evaluate the properties of the product after incorporating the waste material. The results indicate the beneficial effect of forming aluminate spinel phase in the system due to its superior mechanical properties. A higher sintering temperature was found to enhance crystal growth in the spinel phase, together with its nanohardness and modulus. The minimum temperature for fabricating nickel aluminate spinel with a surface property comparable to ceramic materials was found to be 1200 °C, although the initiation of the spinel phase can be achieved at a lower temperature. Nano-indentation experiments performed on the spinel-containing samples leached by strong acid and alkaline solutions reveal the superiority of nickel aluminate spinel in resisting acid and alkaline attack and also suggest a reliable mechanism for hosting hazardous nickel in the crystal structure. © 2011 Elsevier Ltd and Techna Group S.r.l.en_US
dc.languageengen_US
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/ceraminten_US
dc.relation.ispartofCeramics Internationalen_US
dc.subjectAcidic/alkaline attacken_US
dc.subjectAlkaline attacken_US
dc.subjectAlkaline solutionsen_US
dc.subjectAlumina precursoren_US
dc.subjectAluminate spinel-
dc.titleNano-indentation on nickel aluminate spinel and the influence of acid and alkaline attacks on the spinel surfaceen_US
dc.typeArticleen_US
dc.identifier.emailShih, K: kshih@hku.hken_US
dc.identifier.authorityShih, K=rp00167en_US
dc.description.naturelink_to_subscribed_fulltexten_US
dc.identifier.doi10.1016/j.ceramint.2011.12.013en_US
dc.identifier.scopuseid_2-s2.0-84858078423en_US
dc.identifier.hkuros205534-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-84858078423&selection=ref&src=s&origin=recordpageen_US
dc.identifier.volume38en_US
dc.identifier.issue4en_US
dc.identifier.spage3121en_US
dc.identifier.epage3128en_US
dc.identifier.isiWOS:000302522700070-
dc.publisher.placeUnited Kingdomen_US
dc.relation.projectEnvironmental Bio-Nano Interface (EBNI) Characterization System-
dc.relation.projectSpinel Formation in Recycling Sludge-Incineration Ash for Fabrication of Ceramic Materials-
dc.identifier.scopusauthoridShih, K=14072108900en_US
dc.identifier.scopusauthoridHe, Y=54792828900en_US
dc.identifier.citeulike10165478-

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