Dielectric BaTiO3–BBSZ glass ceramic composition with ultra-low sintering temperature
| Autor: | Chih Ta Chia, Chi-Shiung Hsi, Jari Juuti, Mei Yu Chen, Heli Jantunen |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
010302 applied physics
Permittivity Glass-ceramic Materials science Sintering 02 engineering and technology Dielectric 021001 nanoscience & nanotechnology Microstructure 01 natural sciences law.invention symbols.namesake law Phase (matter) 0103 physical sciences Materials Chemistry Ceramics and Composites symbols Dilatometer Composite material 0210 nano-technology Raman spectroscopy |
| Zdroj: | Journal of the European Ceramic Society. 35:139-144 |
| ISSN: | 0955-2219 |
| DOI: | 10.1016/j.jeurceramsoc.2014.08.015 |
| Popis: | Composites made from BaTiO 3 with a high addition of B 2 O 3 –Bi 2 O 3 –SiO 2 –ZnO (BBSZ) glass (50–90 wt.%) were sintered at 450 °C and 400 °C. The shrinkage rates of the compositions as a function of temperature were determined by dilatometer. XRD patterns, Raman spectra and microstructures revealed that an additional phase of Bi 24 Si 2 O 40 was formed when samples were sintered at 450 °C and the glass content exceeded 60 wt.%. Composites with an addition of 70 wt.% of BBSZ had ɛ r = 132 and 207 and tan δ = 0.0056 and 0.028 at 100 kHz and 100 MHz, respectively. Notably, at 100 MHz, the additional Bi 24 Si 2 O 40 phase may be the reason that losses of 80–90 wt.% samples were lower than those of BaTiO 3 and BBSZ glass. Realized composites with 70–90 wt.% of BBSZ glass sintered at 450 °C exhibited a dense structure, high permittivity and acceptable losses. This makes them suitable for various dielectric applications with ultra-low sintering temperature. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect