Formation of nano-sodium niobate crystals in ferroelectric glasses and glass-ceramics of the Na2O-Nb2O5-Al 2O3-SiO2 system
Ferroelectric glasses and glass-ceramics were prepared from selected composition in the Na2O-Nb2O5-Al2O3-SiO2 glass system. Small amount of TiO2 was also added. Conventional melt-quenching technique was employed for a glass production and the selected bulk parent glass samples were subjected to the...
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| Main Authors: | , , |
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| Format: | Journal |
| Published: |
2018
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| Subjects: | |
| Online Access: | https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=77749328408&origin=inward http://cmuir.cmu.ac.th/jspui/handle/6653943832/59665 |
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| Institution: | Chiang Mai University |
| Summary: | Ferroelectric glasses and glass-ceramics were prepared from selected composition in the Na2O-Nb2O5-Al2O3-SiO2 glass system. Small amount of TiO2 was also added. Conventional melt-quenching technique was employed for a glass production and the selected bulk parent glass samples were subjected to the heat-treatment process. Clear transparent glass was obtained but with surprise presence of precipitated nano-size NaNO3 crystals as the result of phase separation. For the heat-treated samples, the longer treatment time induced a higher volume fraction of the NaNbO3 crystals, but thier size was not significantly increased. Dielectric response of the glass-ceramics contained NaNbO3 crystals is the combination of all contribution from both crystalline phases and the glass matrix. Copyright © Taylor & Francis Group, LLC. |
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