A Phenomenological Model on Phase Transitions in Nanocrystalline Barium Titanate Ceramic
| Autor: | Xiaohui Wang, Han Wang, Tieyu Sun, Zhida Cheng, Xiaoquan Zhang, Chang Q. Sun, Longtu Li |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
Phase transition
Materials science Condensed matter physics Ferroelectricity Nanocrystalline material Grain size Condensed Matter::Materials Science chemistry.chemical_compound chemistry Phase (matter) visual_art Barium titanate Phenomenological model Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Forensic engineering Ceramic |
| Zdroj: | Journal of the American Ceramic Society. 93:2571-2573 |
| ISSN: | 0002-7820 |
| DOI: | 10.1111/j.1551-2916.2010.03900.x |
| Popis: | An innovative method is presented to estimate the size effect on the ferroelectric phase transitions in the barium titanate ceramic system. The method is based on the phenomenological thermodynamic theory with additional stress led by surface bond contraction. Two symmetry-breaking factors are introduced to correct the stress. This method has enabled us to predict the changing trends in phase transitions and the critical grain size for the disappearance of ferroelectric phase, which is beyond the prediction of existing models. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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