Abstract
We report the use of a novel powder-in-sol precursor hybrid processing route to synthesize dense, homogeneous, and fine-crystalline Ba0.6Sr0.4TiO3-MgO (BST-MgO) ceramics as well as the study of the sintering behavior, microstructures, and dielectric properties of the ceramics. Nanosized BST powders are dispersed into BST sol-gel precursor and uniformly distributed BST slurry is obtained after ball-milling mixing. Mg(NO3)·6H2O solution is added to the BST slurry to give homogeneous BST-MgO slurry upon ball-milling mixing. The BST-MgO slurry is dried and calcined prior to pressing and sintering at low temperatures of 1200-1300 °C to form the ceramics. The ceramics possess very low dielectric loss tangent below 0.005 for frequency above 1 kHz and for temperature in the range -190-80 °C. The dielectric constant and dielectric tunability increase, while the ferroelectric transition broadening decreases, with increasing average grain size.
Original language | English |
---|---|
Pages (from-to) | 1218-1222 |
Number of pages | 5 |
Journal | Journal of Physics and Chemistry of Solids |
Volume | 70 |
Issue number | 8 |
DOIs | |
Publication status | Published - 1 Aug 2009 |
Keywords
- A. Ceramics
- A. Nanostructures
- D. Dielectric properties
- D. Microstructure
ASJC Scopus subject areas
- Chemistry(all)
- Materials Science(all)
- Condensed Matter Physics