Phase relation in the oxygen nonstoichiometric system, SrFeOx (2.5 ≤ x ≤ 3.0)

Takeda, Yasuo; Kan'no, K.; Takada, Toshio; Yamamoto, Osamu; Takano, Mikio; Nakayama, Noriaki; Bandō, Yoshichika

doi:10.1016/0022-4596(86)90174-x

Cited by 448 publications

(284 citation statements)

References 8 publications

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“…In this investigation, we have prepared the nonstoichiometric perovskite, SrFeO x (2.5 ≤ x ≤ 3.0) [15,16] using wet chemical methods, mechanochemical processing and solid state reaction in order to compare the crystallite size and specific surface area of the samples. SrFeO x is a mixed ionic electronic conductor in which the reversible oxygen nonstoichiometry may be exploited for gas sensor applications [11,[17][18][19].…”

Section: Introductionmentioning

confidence: 99%

The Effect of Preparation Method and Calcination Temperature on the Crystallite Size and Surface Area of Perovskite-Type SrFeOx

Majid

Tunney

Argue

et al. 2004

J Sol-Gel Sci Technol

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Section: Introductionmentioning

confidence: 99%

The Effect of Preparation Method and Calcination Temperature on the Crystallite Size and Surface Area of Perovskite-Type SrFeOx

Majid

Tunney

Argue

et al. 2004

J Sol-Gel Sci Technol

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“…[1][2][3][4] The end member phases for these compounds are the orthorhombic brownmillerite form at x ϳ 0 and cubic or pseudocubic perovskite at x Ͼ 0.4. At intermediate oxygen stoichiometry, phases based on a distorted cubic structure exist; these are tetragonal and orthorhombic structures that possess longer range ordering of the oxygen sublattice.…”

Section: Introductionmentioning

confidence: 99%

“…3 Phase transformations are identified using differential thermal analysis, thermogravimetric analysis, oxygen titration, and Mössbauer spectroscopy. 2,3,5 The study of the bulk electrical conductivity of the SrFeO 3 system showed that the material is a p-type semiconductor within a certain range of ͕T , P ͑O 2 ͒ ͖ with the conductivity of SrFeO 3 increasing with increasing of P ͑O 2 ͒ , 6 suggesting that this physical property can be exploited for a number of technological applications. As a result, perovskites and related oxides have attracted considerable interest.…”

Section: Introductionmentioning

confidence: 99%

Thermal stability of SrFeO3/Al2O3 thin films: Transmission electron microscopy study and conductometric sensing response

Wang

Tunney

et al. 2008

Journal of Applied Physics

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Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://doi.org/10.1063/1.2957073Access and use of this website and the material on it are subject to the Terms and Conditions set forth at Thermal stability of SrFeO3/Al2O3 thin films: transmission electron microscopy study and conductometric sensing response Wang, Dashan; Tunney, Jim; Du, Xiaomei; Post, Michael; Gauvin, Raynald http://nparc.cisti-icist.nrc-cnrc.gc.ca/fra/droits L'accès à ce site Web et l'utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D'UTILISER CE SITE WEB. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/view/object/?id=69375db3-8b17-42fe-957d-a990a0a2ef6d http://nparc.cisti-icist.nrc-cnrc.gc.ca/fra/voir/objet/?id=69375db3-8b17-42fe-957d-a990a0a2ef6d The SrFeO 3 / Al 2 O 3 thin film system has been studied using transmission electron microscopy ͑TEM͒. The thin films of SrFeO 3 were grown by pulsed laser deposition onto single crystal and sintered polycrystalline Al 2 O 3 substrates at room temperature ͑RT͒ and 700°C and subjected to annealing for various periods of time at 700-1000°C. TEM characterization showed that the morphology of the film varied with changes of deposition temperature. Films deposited at RT featured a columnar structure and those deposited at 700°C showed layers with crystalline grains. The interfacial structures of the films remained unchanged below 700°C. Interfacial reactions were observed following annealing at 850°C for 5 h. The phase transformation at the interface was characterized for the film annealed at 1000°C for 5 h, for which the principal phases were identified as SrAl 2−x Fe x O 4 and SrFe 12−y Al y O 19 . Evaluation for thin film conductometric sensing applications indicated that the untreated films deposited at 700°C onto both single crystal and sintered Al 2 O 3 substrates exhibited a p-type gas sensor response to oxygen at 500°C.

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“…SrFeO x [5][6][7][8] and other perovskites based on the Sr Fe y Co 1−y O x (0 ≤ y ≤ 1.0; 2.5 ≤ x ≤ 3.0) system [9,10] are mixed ionic electronic conductors in which the reversible oxygen non-stoichiometry may be exploited for gas sensor applications. These materials undergo reversible phase transitions from the conductive cubic perovskite structure to the much less conductive brownmillerite structure.…”

Section: Introductionmentioning

confidence: 99%

Process optimization and characterization of thin films of SrFeO3-x by the pechini method

Majid

Tunney

Post

et al. 2006

J Sol-Gel Sci Technol

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/npsi/ctrl?action=rtdoc&an=9077022&lang=en http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/ctrl?action=rtdoc&an=9077022&lang=frAccess and use of this website and the material on it are subject to the Terms and Conditions set forth at http://nparc.cisti-icist.nrc-cnrc.gc.ca/npsi/jsp/nparc_cp.jsp?lang=en NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous.http://dx.doi.org/10.1007/s10971-006-6784-5Journal of Sol-Gel Science and Technology, 38, 3, pp. 271-275, 2006 Process optimization and characterization of thin films of SrFeO3-x by the pechini method Majid, Abdul; Tunney, Jim; Post, Michael; Margeson, James Highly sophisticated surface related properties, such as optical, magnetic, electronic, catalytic, mechanical, chemical and tribological properties can be obtained by advanced nanostructured coatings, making them attractive for various industrial applications. In this report we describe our efforts at developing methodology for the fabrication of SrFeO 3−x based thin films using a modified Pechini method. Thin films of SrFeO 3−x were fabricated using spin coating and a drop coating method developed in-house on Al 2 O 3 and Si-substrates. The films annealed at 600• C for one hour show a perovskite phase. The grain size increases with increase in annealing temperature. The influence of various variables such as metal to chelant ratio, drying control reagents, calcination conditions, substrate type and mode of film formation were studied using XRD, optical microscopy, SEM and AFM.

show abstract

Phase relation in the oxygen nonstoichiometric system, SrFeOx (2.5 ≤ x ≤ 3.0)

Cited by 448 publications

References 8 publications

The Effect of Preparation Method and Calcination Temperature on the Crystallite Size and Surface Area of Perovskite-Type SrFeOx

The Effect of Preparation Method and Calcination Temperature on the Crystallite Size and Surface Area of Perovskite-Type SrFeOx

Thermal stability of SrFeO3/Al2O3 thin films: Transmission electron microscopy study and conductometric sensing response

Process optimization and characterization of thin films of SrFeO3-x by the pechini method

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