Zhang, H., Sun, T.-Y., Wang, Y., Kong, L. B., Kwok, K.-W., Karaki, T., Lam, K.-h. , Mak, C.-L. and Hou, F. (2016) Studies of interface characteristics of fine-grain ferroelectric based glass-ceramic composites using impedance spectroscopy. Journal of Alloys and Compounds, 682, pp. 196-202. (doi: 10.1016/j.jallcom.2016.04.274)
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Abstract
High-quality fine-grained ferroelectric glass-ceramic composites were successfully fabricated by using a modified hybrid processing. The properties of interfaces were investigated by using impedance spectroscopy (IS). In our measured impedance spectra, a polarization with an ideal Debye behavior was observed at intermediate frequency ranging between 1 kHz and 100 kHz. This polarization was attributed to the space charge accumulation at the grain-boundary interfaces, due to the presence of large dielectric constant difference between the fillers and the host. Basing on the IS results, a brick-layer microstructural model was proposed for the ferroelectric glass-ceramic composites. Our studies indicated that the new modified hybrid processing can be used to design composites with desired interfaces that have a homogeneous dielectric constant, so as to achieve high breakdown strength, thus leading to high electrical energy density storage devices.
| Item Type: | Articles |
|---|---|
| Status: | Published |
| Refereed: | Yes |
| Glasgow Author(s) Enlighten ID: | Lam, Dr Koko |
| Authors: | Zhang, H., Sun, T.-Y., Wang, Y., Kong, L. B., Kwok, K.-W., Karaki, T., Lam, K.-h., Mak, C.-L., and Hou, F. |
| College/School: | College of Science and Engineering > School of Engineering > Systems Power and Energy |
| Journal Name: | Journal of Alloys and Compounds |
| Publisher: | Elsevier |
| ISSN: | 0925-8388 |
| ISSN (Online): | 1873-4669 |
| Related URLs: |
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