DC Field | Value | Language |
---|---|---|
dc.contributor.author | Hosseini, N | - |
dc.contributor.author | Karimzadeh, F | - |
dc.contributor.author | Abbasi, MH | - |
dc.contributor.author | Choi, GM | - |
dc.date.accessioned | 2016-03-31T07:35:03Z | - |
dc.date.available | 2016-03-31T07:35:03Z | - |
dc.date.created | 2015-02-08 | - |
dc.date.issued | 2014-09 | - |
dc.identifier.issn | 0272-8842 | - |
dc.identifier.other | 2014-OAK-0000031831 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/13790 | - |
dc.description.abstract | In this research, the electrical conductivity of CuxMn3-xO4 (0.9 <= x <= 1.3) spinel powders prepared by an optimized glycine-nitrate process (GNP) followed by high-energy mechanical milling was studied. The samples were characterized by X-ray diffraction (XRD), thermal gravimetric and differential thermal analysis (TG/DTA), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), 4-probe DC and Archimedes methods. Different glycine/nitrate (GIN) ratios of 0.56, 1.11 and 1.67 were employed, from which the 1.11 (stoichiometric ratio) resulted in the formation of desired spinel phase. The as-prepared powder was calcined at 500 degrees C for 2 h under Ar atmosphere (referred as sample A). To evaluate the effect of grain size on electrical conductivity, sample A was milled for 1 h (sample B) and 3 h (sample C) and pelletized under a pressure of 50 MPa. The results showed that sample A had a very low relative density after cold pressing (similar to 40%) leading to a significantly lower conductivity (14.4 S cm(-1) at 750 degrees C) with an activation energy of 0.76 eV as compared to the samples B (29 S cm(-1) at 750 degrees C) and C (23 S cm(-1) at 750 degrees C), with the activation energies of 0.67 and 0.72, respectively. Sample C (average grain size of similar to 10 nm), with larger fraction of grain boundaries, exhibited lower conductivity with respect to sample B (average grain size of similar to 22 nm) due to the higher level of charge canier scattering. The optimized GNP-mechanical milling process was then applied on CuxMn3-xO4 (0.9 <= x <= 1.3) spinels to probe the effect of copper content on electrical conductivity. In this case, all stoichiometries were sintered at 1250 degrees C for 2 h. The results showed that the conductivity increases from 52 to 140 S cm(-1) by increasing the copper content in the range of 0.9 <= x <= 1.3 at 750 degrees C. This arises from a gradual increase in Mn3+-Mn4+ octahedrally located ion pairs. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved. | - |
dc.description.statementofresponsibility | X | - |
dc.language | English | - |
dc.publisher | Elsevier | - |
dc.relation.isPartOf | CERAMICS INTERNATIONAL | - |
dc.subject | Milling | - |
dc.subject | Electrical conductivity | - |
dc.subject | Spinels | - |
dc.subject | Glycine-nitrate process | - |
dc.subject | SOFC INTERCONNECT APPLICATIONS | - |
dc.subject | FERRITIC STAINLESS-STEELS | - |
dc.subject | DOPED CERIA | - |
dc.subject | POWDERS | - |
dc.subject | COATINGS | - |
dc.subject | STRONTIUM | - |
dc.subject | BEHAVIOR | - |
dc.subject | TEMPERATURES | - |
dc.subject | NANOPOWDERS | - |
dc.subject | MANGANITES | - |
dc.title | Microstructural characterization and electrical conductivity of CuxMn3-xO4 (0.9 <= x <= 1.3) spinels produced by optimized glycine-nitrate combustion and mechanical milling processes | - |
dc.type | Article | - |
dc.contributor.college | 신소재공학과 | - |
dc.identifier.doi | 10.1016/J.CERAMINT.2014.04.065 | - |
dc.author.google | Hosseini, N | - |
dc.author.google | Karimzadeh, F | - |
dc.author.google | Abbasi, MH | - |
dc.author.google | Choi, GM | - |
dc.relation.volume | 40 | - |
dc.relation.issue | 8 | - |
dc.relation.startpage | 12219 | - |
dc.relation.lastpage | 12226 | - |
dc.contributor.id | 10104826 | - |
dc.relation.journal | CERAMICS INTERNATIONAL | - |
dc.relation.index | SCI급, SCOPUS 등재논문 | - |
dc.relation.sci | SCI | - |
dc.collections.name | Journal Papers | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | CERAMICS INTERNATIONAL, v.40, no.8, pp.12219 - 12226 | - |
dc.identifier.wosid | 000340328600091 | - |
dc.date.tcdate | 2019-01-01 | - |
dc.citation.endPage | 12226 | - |
dc.citation.number | 8 | - |
dc.citation.startPage | 12219 | - |
dc.citation.title | CERAMICS INTERNATIONAL | - |
dc.citation.volume | 40 | - |
dc.contributor.affiliatedAuthor | Choi, GM | - |
dc.identifier.scopusid | 2-s2.0-84903901243 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.wostc | 11 | - |
dc.description.scptc | 9 | * |
dc.date.scptcdate | 2018-05-121 | * |
dc.type.docType | Article | - |
dc.subject.keywordPlus | FERRITIC STAINLESS-STEELS | - |
dc.subject.keywordPlus | COATINGS | - |
dc.subject.keywordPlus | STRONTIUM | - |
dc.subject.keywordPlus | BEHAVIOR | - |
dc.subject.keywordPlus | NANOPOWDERS | - |
dc.subject.keywordPlus | POWDERS | - |
dc.subject.keywordAuthor | Milling | - |
dc.subject.keywordAuthor | Electrical conductivity | - |
dc.subject.keywordAuthor | Spinels | - |
dc.subject.keywordAuthor | Glycine-nitrate process | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Ceramics | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Materials Science | - |
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