ALCHEMI studies of site occupancies in Cr-, Ni-, and Fe-substituted manganese cobaltite spinels

Gambino, Louis; Freeman, Alex B.; Magdefrau, Neal J.; Aindow, Mark

doi:10.1007/s10853-015-9307-3

Cited by 5 publications

(3 citation statements)

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“…Previous investigations of the cation distribution in MnCo2-xFexO4 have suggested both a mixed occupancy of Fe on tetrahedral and octahedral sites [48], and that Fe mainly occupies the latter [73]. Crystal field theory predicts that both Mn 3+ and Co 3+ have a stronger preference for the octahedral site than Fe 3+ [74].…”

Section: Crystal Structurementioning

confidence: 94%

Thermal expansion and electrical conductivity of Fe and Cu doped MnCo2O4 spinel

et al. 2018

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Manganese cobalt spinel oxides are promising coating materials for corrosion protection of metallic interconnects in solid oxide fuel cell stacks. This work investigates how Fe and Cu doping affect the crystal structure, thermal expansion and electrical conductivity of the MnCo2-xMxO4 (M=Cu, Fe; x = 0.1, 0.3, 0.5) spinel oxides. Single phase cubic spinels were successfully prepared by spray pyrolysis. The electrical conductivity between room temperature and 1000 °C increased with addition of Cu and decreased with addition of Fe. The thermal expansion coefficient (TEC) between 50 and 800 °C decreased from 14.4 to 11.0×10-6 K-1 going from MnCo2O4 to MnCo1.5Fe0.5O4. The TEC of the Cu substituted materials did not follow any obvious trend with composition and was likely influenced by precipitation of CuO during heating. Based on their physical properties, the Fe doped materials are the most attractive for application as SOFC interconnect coatings.

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Section: Crystal Structurementioning

confidence: 94%

Thermal expansion and electrical conductivity of Fe and Cu doped MnCo2O4 spinel

et al. 2018

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“…This development was described in the late Professor Anthony Kelly's review article in the 40th Anniversary Issue [29]. It has also been charted in several special issues since then [volumes(issues): 41(13), 41 (20), 43(13), 43 (20), 44(6), and 47 (15)], including a 2008 festschrift (volume 43, issue 12) in honor of our former Editor-in-Chief, Rees Rawlings, who made many important contributions in this area. The seven papers in this group reflect well the diverse character of composite materials.…”

mentioning

confidence: 99%

“…Changes in the orientation relationship between the spinel and the substrate with reaction temperature are used to infer a change in the rate-controlling diffusive processes. Gambino et al present a TEM study of cation site occupancy effects in Cr-, Ni-, and Fesubstituted manganese cobaltite spinels using X-ray spectrometry Atom Location by Channeling Enhanced MIcroanalysis (ALCHEMI) experiments [20].…”

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confidence: 99%

Preface to the 50th anniversary issue of the Journal of Materials Science

Aindow

2015

J Mater Sci

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In his book ''The Coming of Materials Science'' [1], the late Professor Robert Wolfgang Cahn FRS documented the rise of Materials Science as a distinct discipline from its roots in solid-state physics, metallurgy, polymer chemistry, inorganic chemistry, mineralogy, glass, and ceramic technology. The development of the discipline was a process in which he was intimately involved from 1942 when he enrolled at Trinity College, Cambridge to read Metallurgy, to his death from leukemia in 2007. His technical contributions were remarkably diverse, spanning such areas as: defects and deformation mechanisms, crystal growth, recrystallization, intermetallic compounds, and metallic glasses. It was these broad interests that led him to become such a staunch advocate for Materials Science as a discipline. Another of his passions was scientific editing, and he is remembered as much for his editing of several major journals and books as he is for his scientific research work. In 1964, Robert Cahn was invited by the publishers Chapman and Hall to establish the Journal of Materials Science as the first broad-spectrum Materials Science journal. As Chairman of Editors, he recruited a group of Editors with complementary areas of expertise, gave them independent powers of decision on submitted papers, and encouraged them to be pro-active in soliciting papers from key researchers on novel topics. This helped to ensure that the journal fulfilled its mission of being a broad-spectrum inclusive periodical that brought together work on different classes of materials using a wide variety of different experimental and theoretical approaches. The first issue appeared in April of 1966, and the Journal grew rapidly over the next few years to become a major international forum for research in Materials Science. In Robert Cahn's memoirs [2], he said that the years he devoted to creating the Journal of Materials Science represented his single most important editorial contribution to the field. Over the last five decades, there have been many changes to the Journal, to the community that it serves, and to the field as a whole. The publishers have undergone several reorganizations and changes of ownership, and are now part of the Springer Nature group. Specialist sister journals have been spun off in the areas of Materials in Electronics and Materials in Medicine, while others such as Interface Science have been incorporated into the main journal. The community has broadened to encompass more biologists, chemists, and physicists due to developments in, for example, tissue engineering, nanostructured catalysts, and functional oxides, respectively. There have also been dramatic changes in the synthesis, processing, characterization, and computational modeling techniques available to materials scientists, and these advances have had a revolutionary effect on research directions in the field. Throughout, the Editors have maintained an open and flexible definition of Materials Science so that the Journal remains true to Robert Cahn's original vision of ...

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Dense Mn1.5Co1.5O4 coatings with excellent long-term stability and electrical performance under the SOFC cathode environment

et al. 2020

Applied Surface Science

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ALCHEMI studies of site occupancies in Cr-, Ni-, and Fe-substituted manganese cobaltite spinels

Cited by 5 publications

References 58 publications

Thermal expansion and electrical conductivity of Fe and Cu doped MnCo2O4 spinel

Thermal expansion and electrical conductivity of Fe and Cu doped MnCo2O4 spinel

Preface to the 50th anniversary issue of the Journal of Materials Science

Dense Mn1.5Co1.5O4 coatings with excellent long-term stability and electrical performance under the SOFC cathode environment

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