| About this Abstract |
| Meeting |
Materials Science & Technology 2011
|
| Symposium
|
MS&T'11 Poster Session
|
| Presentation Title |
047 Glass-Ceramic Composites for High Energy Density Capacitors
|
| Author(s) |
Venkata S Puli, Ashok Kumar, Reji Thomas, Douglas B Chrisey, Minoru Tomazawa, Ram S Katiyar |
| On-Site Speaker (Planned) |
Venkata S Puli |
| Abstract Scope |
A glass-ceramic composites of {Ba(Zr0.2Ti0.8)O3}(0.85){(Ba0.7Ca0.3)TiO3}0.15 and alkali free glass: BaO-B2O3-ZnO,were mixed with 10% volumetric of glass for high energy density (Ed) capacitor materials. Fabricated composites showed high ε, low loss and moderate breakdown voltage. The ceramic materials were prepared using high energy ball milling for 4 hrs at 400 rpm. The milled powders were calcined at 1250ºC/10hrs. Ceramic pellets were prepared using hydraulic press (2 ton) and sintered at 1500ºC/4 hrs. Glass compositions mentioned above were mixed with ceramic powders and milled for 2hrs. Glass-ceramic pellets sintered at 900ºC/4hrs. XRD studies of the sintered pellets revealed the rhombohedral/pseudo cubic crystal structure with composite behavior. The crystal structure was further confirmed by Raman spectra and SEM analysis. High ε and moderate Ps~13µC/cm2 were obtained in the sintered pellets. The SEM revealed monolithic grain growth. Preliminary data show moderate breakdown field 60kV/cm and Ed of ~1.5 J/cm3. Detailed results will be presented. |
| Proceedings Inclusion? |
Undecided |