| Autor: |
Xiukai Cai, Lufeng Pang, Xiaobo Sun |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
2017 Joint IEEE International Symposium on the Applications of Ferroelectric (ISAF)/International Workshop on Acoustic Transduction Materials and Devices (IWATMD)/Piezoresponse Force Microscopy (PFM). |
| DOI: |
10.1109/isaf.2017.8000203 |
| Popis: |
Bismuth-nickel-niobium oxide based ceramics have been prepared by conventional solid state reaction technique. The structure and dielectric properties in this ternary oxide system have been investigated by X-ray diffraction analyses and temperature dependences of dielectric constant and loss factor measured at a wide range of frequencies (1 kHz to 100 kHz). Along the Bi 2 O 3 :Nb 2 O 5 =1∶1 composition line, there exist main phase of cubic pyrochlore type structure, and some other impurity phases common to vast range of selected compositions. Besides the low temperature dielectric relaxation found in the liquid nitrogen temperatures, another dielectric loss peak occurs at higher temperature. The estimated activation energy is of approximately 0.50 eV, and can be related to the loss arising from conduction process of the impurities and the defects. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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