Phase formation and grain growth of BSCZT ceramics prepared by BST- BZT seed induced method
© 2018 Trans Tech Publications, Switzerland. In this work, lead-free Ba0.4Sr0.4Ca0.2Zr0.05Ti0.95O3(BSCZT) ceramics were prepared by the seed induced method using (0.5Ba0.6Sr0.4TiO3–0.5BaZr0.05Ti0.95O3) (BST-BZT) seed. Seed crystals with concentrations of 0, 2.5, 5, 7.5, 10 mol% were mixed with BSCZT...
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| Main Authors: | , , , |
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| Format: | Book Series |
| Published: |
2018
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| Subjects: | |
| Online Access: | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85046105244&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/58710 |
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| Institution: | Chiang Mai University |
| Summary: | © 2018 Trans Tech Publications, Switzerland. In this work, lead-free Ba0.4Sr0.4Ca0.2Zr0.05Ti0.95O3(BSCZT) ceramics were prepared by the seed induced method using (0.5Ba0.6Sr0.4TiO3–0.5BaZr0.05Ti0.95O3) (BST-BZT) seed. Seed crystals with concentrations of 0, 2.5, 5, 7.5, 10 mol% were mixed with BSCZT powder for 24 h and sintered at 1400 °C for 4 h. The phase formation and microstructure of BSCZT ceramic were characterized by X-ray diffraction technique (XRD) and the scanning electron microscopy (SEM). All samples showed a single phase perovskite structure without impurities and exhibited the existence of the tetragonal phase. The density values of the ceramics decreased from 4.90 to 4.75 g/cm3with increasing seed crystal concentrations. The grain size of the sample without seed was 3.71 µm, whereas a grain size of 8.99 µm was observed for the sample with 10 mol% seed crystal. The dielectric constant at room temperature at 1 kHz was 1831 for the sample with 10 mol% seed crystal while the dielectric constant of the sample without seed was 1484. From the results in this work, BST-BZT seed can increase grain size and improve the dielectric constant at room temperature. |
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