Microwave Dielectric Properties of Rare-Earth Ortho-Niobates with Ferroelasticity
| Autor: | Sung Hun Yoon, Kug Sun Hong, Do-Kyun Kwon, Dong Wan Kim |
|---|---|
| Rok vydání: | 2006 |
| Předmět: |
Diffraction
Materials science Ferroelasticity Condensed matter physics business.industry Physics::Optics Relative permittivity Dielectric Condensed Matter::Materials Science Optics Phase (matter) Dielectric heating Materials Chemistry Ceramics and Composites business Temperature coefficient Microwave |
| Zdroj: | Journal of the American Ceramic Society. 89:3861-3864 |
| ISSN: | 1551-2916 0002-7820 |
| DOI: | 10.1111/j.1551-2916.2006.01302.x |
| Popis: | In the search for more temperature-stable materials, herein, we report on the microwave dielectric properties and trends of the rare-earth niobate series (RENbO4), with the main emphasis being placed on LaNbO4. LaNbO4 has excellent microwave dielectric properties, especially an anomalous small positive temperature coefficient of resonant frequency of 9 ppm/°C. We present the phase transformation and ferroelastic domain configuration of RENbO4 studied using in situ X-ray diffraction and high-resolution transmission electron microscopy. The structural distortion caused by the phase transformation is a dominant factor in the relative dielectric constant and temperature coefficient of the resonant frequency in RENbO4. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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