Impedance analysis of Nb2O5 doped BaTiO3-Na0.5Bi0.5TiO3 ceramics

Yue Sun; Hanxing Liu; Hua Hao; Shujun Zhang

doi:10.1109/ISAF.2014.6923012

Impedance analysis of Nb₂O₅ doped BaTiO₃-Na_0.5Bi_0.5TiO₃ ceramics

Yue Sun, Hanxing Liu, Hua Hao, Shujun Zhang

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

3 Citations (Scopus)

Abstract

BaTiO₃-based MLCC materials were limited for high temperature applications (temperature range up to 200°C), due to their low Curie temperatures. The addition of Na_0.5Bi_0.5TiO₃(NBT) component in BaTiO₃(BT) based ceramics was found to increase the Curie temperature, without sacrificing the dielectric constant. The Curie temperature was reported to increase from 125°C to 156°C with addition up to 10mol%, making it possible to satisfy the X8R or X9R criterions. In addition, the small amount of Nb₂O₅ dopant in the system leads to a diffused dielectric maxima and improved temperature stability. The NBT-BT with 2wt% Nb₂O₅ addition was found to exhibit a core-shell structure, while maintaining the dielectric constant at about 2500. To analyze the electrical microstructure variation, the obtained impedance data was fitted by a 4RC equivalent circuit, corresponding to the core, shell, grain boundary, and ceramic/electrode interface regions. All the electrical properties, including the capacitance, activation energy, and conductivity could be well explained by using this equivalent circuit. © 2014 IEEE.

Original language	English
Title of host publication	2014 Joint IEEE International Symposium on the Applications of Ferroelectric, International Workshop on Acoustic Transduction Materials and Devices and Workshop on Piezoresponse Force Microscopy, ISAF/IWATMD/PFM 2014
Publisher	IEEE
ISBN (Print)	9781479938605
DOIs	https://doi.org/10.1109/ISAF.2014.6923012
Publication status	Published - 13 Oct 2014
Externally published	Yes
Event	2014 Joint IEEE International Symposium on the Applications of Ferroelectric, International Workshop on Acoustic Transduction Materials and Devices and Workshop on Piezoresponse Force Microscopy, ISAF/IWATMD/PFM 2014 - State College, United States Duration: 12 May 2014 → 16 May 2014

Conference

Conference	2014 Joint IEEE International Symposium on the Applications of Ferroelectric, International Workshop on Acoustic Transduction Materials and Devices and Workshop on Piezoresponse Force Microscopy, ISAF/IWATMD/PFM 2014
Place	United States
City	State College
Period	12/05/14 → 16/05/14

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to <a href="mailto:[email protected]">[email protected]</a>.

Funding

This work was supported by the Key program of Natural Science Foundation of China (No.50932004), International Science and Technology Cooperation Program of China (2011DFA52680), Natural Science Foundation of China (No.51372191,No.51102189), the program for New Century Excellent Talents in University (No.NCET-11-0685), and the Fundamental Research Funds for the Central Universities(WUT:2014-IV-134).

Research Keywords

BaTiO3-Na0.5Bi0.5TiO3
impedance analysis
MLCCs
Nb2O5 doped

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Sun, Y., Liu, H., Hao, H., & Zhang, S. (2014). Impedance analysis of Nb₂O₅ doped BaTiO₃-Na_0.5Bi_0.5TiO₃ ceramics. In 2014 Joint IEEE International Symposium on the Applications of Ferroelectric, International Workshop on Acoustic Transduction Materials and Devices and Workshop on Piezoresponse Force Microscopy, ISAF/IWATMD/PFM 2014 Article 6923012 IEEE. https://doi.org/10.1109/ISAF.2014.6923012

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title = "Impedance analysis of Nb2O5 doped BaTiO3-Na0.5Bi0.5TiO3 ceramics",

abstract = "BaTiO3-based MLCC materials were limited for high temperature applications (temperature range up to 200°C), due to their low Curie temperatures. The addition of Na0.5Bi0.5TiO3(NBT) component in BaTiO3(BT) based ceramics was found to increase the Curie temperature, without sacrificing the dielectric constant. The Curie temperature was reported to increase from 125°C to 156°C with addition up to 10mol%, making it possible to satisfy the X8R or X9R criterions. In addition, the small amount of Nb2O5 dopant in the system leads to a diffused dielectric maxima and improved temperature stability. The NBT-BT with 2wt% Nb2O5 addition was found to exhibit a core-shell structure, while maintaining the dielectric constant at about 2500. To analyze the electrical microstructure variation, the obtained impedance data was fitted by a 4RC equivalent circuit, corresponding to the core, shell, grain boundary, and ceramic/electrode interface regions. All the electrical properties, including the capacitance, activation energy, and conductivity could be well explained by using this equivalent circuit. {\textcopyright} 2014 IEEE.",

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Sun, Y, Liu, H, Hao, H & Zhang, S 2014, Impedance analysis of Nb₂O₅ doped BaTiO₃-Na_0.5Bi_0.5TiO₃ ceramics. in 2014 Joint IEEE International Symposium on the Applications of Ferroelectric, International Workshop on Acoustic Transduction Materials and Devices and Workshop on Piezoresponse Force Microscopy, ISAF/IWATMD/PFM 2014., 6923012, IEEE, 2014 Joint IEEE International Symposium on the Applications of Ferroelectric, International Workshop on Acoustic Transduction Materials and Devices and Workshop on Piezoresponse Force Microscopy, ISAF/IWATMD/PFM 2014, State College, United States, 12/05/14. https://doi.org/10.1109/ISAF.2014.6923012

Impedance analysis of Nb₂O₅ doped BaTiO₃-Na_0.5Bi_0.5TiO₃ ceramics. / Sun, Yue; Liu, Hanxing; Hao, Hua et al.
2014 Joint IEEE International Symposium on the Applications of Ferroelectric, International Workshop on Acoustic Transduction Materials and Devices and Workshop on Piezoresponse Force Microscopy, ISAF/IWATMD/PFM 2014. IEEE, 2014. 6923012.

Research output: Chapters, Conference Papers, Creative and Literary Works › RGC 32 - Refereed conference paper (with host publication) › peer-review

TY - GEN

T1 - Impedance analysis of Nb2O5 doped BaTiO3-Na0.5Bi0.5TiO3 ceramics

AU - Sun, Yue

AU - Liu, Hanxing

AU - Hao, Hua

AU - Zhang, Shujun

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to <a href="mailto:[email protected]">[email protected]</a>.

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N2 - BaTiO3-based MLCC materials were limited for high temperature applications (temperature range up to 200°C), due to their low Curie temperatures. The addition of Na0.5Bi0.5TiO3(NBT) component in BaTiO3(BT) based ceramics was found to increase the Curie temperature, without sacrificing the dielectric constant. The Curie temperature was reported to increase from 125°C to 156°C with addition up to 10mol%, making it possible to satisfy the X8R or X9R criterions. In addition, the small amount of Nb2O5 dopant in the system leads to a diffused dielectric maxima and improved temperature stability. The NBT-BT with 2wt% Nb2O5 addition was found to exhibit a core-shell structure, while maintaining the dielectric constant at about 2500. To analyze the electrical microstructure variation, the obtained impedance data was fitted by a 4RC equivalent circuit, corresponding to the core, shell, grain boundary, and ceramic/electrode interface regions. All the electrical properties, including the capacitance, activation energy, and conductivity could be well explained by using this equivalent circuit. © 2014 IEEE.

AB - BaTiO3-based MLCC materials were limited for high temperature applications (temperature range up to 200°C), due to their low Curie temperatures. The addition of Na0.5Bi0.5TiO3(NBT) component in BaTiO3(BT) based ceramics was found to increase the Curie temperature, without sacrificing the dielectric constant. The Curie temperature was reported to increase from 125°C to 156°C with addition up to 10mol%, making it possible to satisfy the X8R or X9R criterions. In addition, the small amount of Nb2O5 dopant in the system leads to a diffused dielectric maxima and improved temperature stability. The NBT-BT with 2wt% Nb2O5 addition was found to exhibit a core-shell structure, while maintaining the dielectric constant at about 2500. To analyze the electrical microstructure variation, the obtained impedance data was fitted by a 4RC equivalent circuit, corresponding to the core, shell, grain boundary, and ceramic/electrode interface regions. All the electrical properties, including the capacitance, activation energy, and conductivity could be well explained by using this equivalent circuit. © 2014 IEEE.

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