Abstract
BaTi4O9and B2O3-doped Ba2Ti9O20ceramics powders have been prepared by a sol-gel route. The phase evolution, grain size and dielectric properties of the BaTi4O9and Ba2Ti9O20-based ceramics powders have been investigated. These results show that the BaTi4O9and 5 wt% B2O3-doped Ba2Ti9O20ceramics powders calcined at 800°C for 2 h with the grain sizes of 30-80 and 50-200 nm, respectively. Monophase sample of BaTi4O9with orthorhombic symmetry could be obtained after the BaTi4O9precursor was calcined at 1200°C for 2 h, whereas, monophase sample of 5 wt% B2O3-doped Ba2Ti9O20was obtained at 800°C for 2 h. The BaTi4O9and Ba2Ti9O20: 5 wt% B2O3ceramics fabricated using the sol-gel powders were found to have microwave dielectric properties with εr= 36.1, Q = 3220 at 5.31 GHz, and εr= 34.5, Q = 2425 at 5.53 GHz, respectively. The effect of sintering temperatures on the microwave dielectric properties of the Ba2Ti9O20: 5 wt% B2O3ceramics was studied.
Original language | English |
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Pages (from-to) | 119-122 |
Number of pages | 4 |
Journal | Journal of Electroceramics |
Volume | 14 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1 Mar 2005 |
Keywords
- Ba Ti O 2 9 20
- BaTi O 4 9
- Ceramics
- Dielectric properties
- Microwave materials
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Ceramics and Composites
- Condensed Matter Physics
- Mechanics of Materials
- Materials Chemistry
- Electrical and Electronic Engineering