Synthesis of platelets Bi5Fe0.5Co 0.5Ti3O15 via the molten salt method

Meghdad Palizdar; Timothy Comyn; Santosh Kulkarni; Lynette Keeney; Saibal Roy; Martyn Pemble; Roger Whatmore; Andrew Bell

doi:10.1109/ISAF.2010.5712254

Synthesis of platelets Bi₅Fe_0.5Co _0.5Ti₃O₁₅ via the molten salt method

Meghdad Palizdar
, Timothy Comyn
, Santosh Kulkarni
, Lynette Keeney
, Saibal Roy
, Martyn Pemble
, Roger Whatmore
, Andrew Bell

University of Leeds

Research output: Chapter in Book/Report/Conference proceedings › Conference proceeding › peer-review

Abstract

Oxide materials which exhibit both ferroelectricity and ferromagnetism are of great interest. Layered bismuth titanates with a Aurivillius structure, (BiFeO₃)_n Bi₄Ti₃O₁₂, can potentially posses ferroelectric and ferromagnetic order paramaters simultaneously. It has recently been demonstrated that one such example, Bi ₅Fe_0.5Co_0.5Ti₃O₁₅ where n = 1 with half the Fe³⁺ sites substituted by Co³⁺ ions exhibits both ferroelectric and ferromagnetic properties at room temperature. Here we report on the fabrication of well oriented polycrystalline ceramics of this material, via molten salt synthesis and uniaxial pressing of high aspect ratio platelets. Electron backscatter images showed that there is an extra secondary phase within the obtained ceramic which is rich in cobalt and iron. The concentration of the secondary phase obtained from secondary electron microscopy is estimated at less than 2.5 %, below the detection limit of XRD. Further, the sintering temperature was varied and excess addition of bismuth oxide was employed in an attempt to reduce the secondary phase with limited success. The samples have been characterized by X-ray diffraction, polarization-field measurements and SQUID magnetometery as a function of sample orientation. It is inferred from the data that the resultant ferromagnetic response identified using SQUID measurements is due to the presence of the secondary phase.

Original language	English
Title of host publication	Proceedings of the 2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010
DOIs	https://doi.org/10.1109/ISAF.2010.5712254
Publication status	Published - 2010
Event	2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010 - Edinburgh, Scotland, United Kingdom Duration: 9 Aug 2010 → 12 Aug 2010

Publication series

Name	Proceedings of the 2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010

Conference

Conference	2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010
Country/Territory	United Kingdom
City	Edinburgh, Scotland
Period	9/08/10 → 12/08/10

Keywords

Microstructure
Muiti/erroic
Texture

Access to Document

10.1109/ISAF.2010.5712254

Cite this

Palizdar, M., Comyn, T., Kulkarni, S., Keeney, L., Roy, S., Pemble, M., Whatmore, R., & Bell, A. (2010). Synthesis of platelets Bi₅Fe_0.5Co _0.5Ti₃O₁₅ via the molten salt method. In Proceedings of the 2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010 Article 5712254 (Proceedings of the 2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010). https://doi.org/10.1109/ISAF.2010.5712254

Palizdar, Meghdad ; Comyn, Timothy ; Kulkarni, Santosh et al. / Synthesis of platelets Bi₅Fe_0.5Co _0.5Ti₃O₁₅ via the molten salt method. Proceedings of the 2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010. 2010. (Proceedings of the 2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010).

@inproceedings{ac386fa2754a4f628ac7ce84a1aac981,

title = "Synthesis of platelets Bi5Fe0.5Co 0.5Ti3O15 via the molten salt method",

abstract = "Oxide materials which exhibit both ferroelectricity and ferromagnetism are of great interest. Layered bismuth titanates with a Aurivillius structure, (BiFeO3)n Bi4Ti3O12, can potentially posses ferroelectric and ferromagnetic order paramaters simultaneously. It has recently been demonstrated that one such example, Bi 5Fe0.5Co0.5Ti3O15 where n = 1 with half the Fe3+ sites substituted by Co3+ ions exhibits both ferroelectric and ferromagnetic properties at room temperature. Here we report on the fabrication of well oriented polycrystalline ceramics of this material, via molten salt synthesis and uniaxial pressing of high aspect ratio platelets. Electron backscatter images showed that there is an extra secondary phase within the obtained ceramic which is rich in cobalt and iron. The concentration of the secondary phase obtained from secondary electron microscopy is estimated at less than 2.5 \%, below the detection limit of XRD. Further, the sintering temperature was varied and excess addition of bismuth oxide was employed in an attempt to reduce the secondary phase with limited success. The samples have been characterized by X-ray diffraction, polarization-field measurements and SQUID magnetometery as a function of sample orientation. It is inferred from the data that the resultant ferromagnetic response identified using SQUID measurements is due to the presence of the secondary phase.",

keywords = "Microstructure, Muiti/erroic, Texture",

author = "Meghdad Palizdar and Timothy Comyn and Santosh Kulkarni and Lynette Keeney and Saibal Roy and Martyn Pemble and Roger Whatmore and Andrew Bell",

year = "2010",

doi = "10.1109/ISAF.2010.5712254",

language = "English",

isbn = "9781424481910",

series = "Proceedings of the 2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010",

booktitle = "Proceedings of the 2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010",

note = "2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010 ; Conference date: 09-08-2010 Through 12-08-2010",

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Palizdar, M, Comyn, T, Kulkarni, S, Keeney, L, Roy, S, Pemble, M, Whatmore, R & Bell, A 2010, Synthesis of platelets Bi₅Fe_0.5Co _0.5Ti₃O₁₅ via the molten salt method. in Proceedings of the 2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010., 5712254, Proceedings of the 2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010, 2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010, Edinburgh, Scotland, United Kingdom, 9/08/10. https://doi.org/10.1109/ISAF.2010.5712254

Synthesis of platelets Bi₅Fe_0.5Co _0.5Ti₃O₁₅ via the molten salt method. / Palizdar, Meghdad; Comyn, Timothy; Kulkarni, Santosh et al.
Proceedings of the 2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010. 2010. 5712254 (Proceedings of the 2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010).

Research output: Chapter in Book/Report/Conference proceedings › Conference proceeding › peer-review

TY - GEN

T1 - Synthesis of platelets Bi5Fe0.5Co 0.5Ti3O15 via the molten salt method

AU - Palizdar, Meghdad

AU - Comyn, Timothy

AU - Kulkarni, Santosh

AU - Keeney, Lynette

AU - Roy, Saibal

AU - Pemble, Martyn

AU - Whatmore, Roger

AU - Bell, Andrew

PY - 2010

Y1 - 2010

N2 - Oxide materials which exhibit both ferroelectricity and ferromagnetism are of great interest. Layered bismuth titanates with a Aurivillius structure, (BiFeO3)n Bi4Ti3O12, can potentially posses ferroelectric and ferromagnetic order paramaters simultaneously. It has recently been demonstrated that one such example, Bi 5Fe0.5Co0.5Ti3O15 where n = 1 with half the Fe3+ sites substituted by Co3+ ions exhibits both ferroelectric and ferromagnetic properties at room temperature. Here we report on the fabrication of well oriented polycrystalline ceramics of this material, via molten salt synthesis and uniaxial pressing of high aspect ratio platelets. Electron backscatter images showed that there is an extra secondary phase within the obtained ceramic which is rich in cobalt and iron. The concentration of the secondary phase obtained from secondary electron microscopy is estimated at less than 2.5 %, below the detection limit of XRD. Further, the sintering temperature was varied and excess addition of bismuth oxide was employed in an attempt to reduce the secondary phase with limited success. The samples have been characterized by X-ray diffraction, polarization-field measurements and SQUID magnetometery as a function of sample orientation. It is inferred from the data that the resultant ferromagnetic response identified using SQUID measurements is due to the presence of the secondary phase.

AB - Oxide materials which exhibit both ferroelectricity and ferromagnetism are of great interest. Layered bismuth titanates with a Aurivillius structure, (BiFeO3)n Bi4Ti3O12, can potentially posses ferroelectric and ferromagnetic order paramaters simultaneously. It has recently been demonstrated that one such example, Bi 5Fe0.5Co0.5Ti3O15 where n = 1 with half the Fe3+ sites substituted by Co3+ ions exhibits both ferroelectric and ferromagnetic properties at room temperature. Here we report on the fabrication of well oriented polycrystalline ceramics of this material, via molten salt synthesis and uniaxial pressing of high aspect ratio platelets. Electron backscatter images showed that there is an extra secondary phase within the obtained ceramic which is rich in cobalt and iron. The concentration of the secondary phase obtained from secondary electron microscopy is estimated at less than 2.5 %, below the detection limit of XRD. Further, the sintering temperature was varied and excess addition of bismuth oxide was employed in an attempt to reduce the secondary phase with limited success. The samples have been characterized by X-ray diffraction, polarization-field measurements and SQUID magnetometery as a function of sample orientation. It is inferred from the data that the resultant ferromagnetic response identified using SQUID measurements is due to the presence of the secondary phase.

KW - Microstructure

KW - Muiti/erroic

KW - Texture

UR - https://www.scopus.com/pages/publications/79953043872

U2 - 10.1109/ISAF.2010.5712254

DO - 10.1109/ISAF.2010.5712254

M3 - Conference proceeding

AN - SCOPUS:79953043872

SN - 9781424481910

T3 - Proceedings of the 2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010

BT - Proceedings of the 2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010

T2 - 2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010

Y2 - 9 August 2010 through 12 August 2010

ER -

Palizdar M, Comyn T, Kulkarni S, Keeney L, Roy S, Pemble M et al. Synthesis of platelets Bi₅Fe_0.5Co _0.5Ti₃O₁₅ via the molten salt method. In Proceedings of the 2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010. 2010. 5712254. (Proceedings of the 2010 IEEE International Symposium on the Applications of Ferroelectrics, ISAF 2010, Co-located with the 10th European Conference on the Applications of Polar Dielectrics, ECAPD 2010). doi: 10.1109/ISAF.2010.5712254