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Microstructural, Raman and dielectric properties of (1−x)NaNbO3–xBiCrO3 biphase ceramics |
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| Authors: | Yu-Jen Hsiao Yen-Hwei Chang Te-Hua Fang Yee-Shin Chang Yin-Lai Chai |
| Affiliation: | aDepartment of Materials Science and Engineering, National Cheng Kung University, Tainan 701, Taiwan bInstitute of Mechanical and Electromechanical Engineering, National Formosa University, Yunlin 632, Taiwan cInstitute of Electro-Optical and Materials Science, National Formosa University, Yunlin 632, Taiwan dDepartment of Resources Engineering, Dahan Institute of Technology, Hualien 971, Taiwan |
| Abstract: | The phase, microstructural and dielectric properties of (1−x)NaNbO3–xBiCrO3 (x = 0.1, 0.2, 0.3, 0.4 and 0.5) ceramics with perovskite–pyrochlore mixed-phase were investigated. A single-phase solid solution in the sintered specimens was identified as observed perovskite phase for x = 0.1 and pyrochlore for x = 0.5. The results indicate that the microstructure has mixed large and small grains. Dielectric constants and dielectric loss were measured as functions of temperatures (−15 to 200 °C) at 1 kHz. Complex impedance spectroscopy shows the presence of barrier layers in biphase ceramics. The Raman spectra and porosity percentage in the biphase system were also measured. |
| Keywords: | Perovskite Pyrochlore Solid-state reaction Raman Dielectric |
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