Bi 12SiO 20 ceramics were well sintered at 800°C after calcination at 700°C. A liquid phase of composition Bi 2O 3 was formed during the sintering at temperatures ≥800°C and assisted the densification of the Bi 12SiO 20 ceramics. When the sintering temperature exceeded 800°C, however, the relative density, ε r, and Q × f values of the Bi 12SiO 20 ceramics decreased, probably due to the formation of a large amount of the liquid phase. The Bi 12SiO 20 ceramics sintered at 800°C for 5.0 h exhibited excellent microwave dielectric properties with a high ε r of 43, a high Q × f of 86,802 GHz and a small τ f of -10.39 ppm/°C.
|Number of pages||4|
|Journal||Materials Research Bulletin|
|Publication status||Published - 2012 Dec|
Bibliographical noteFunding Information:
This work was supported by the Industrial Strategic Technology Development Program , 10041232, ‘Development of synthesis method of exfoliated inorganic nanosheets with a high dielectric constant of >300 and the corresponding thin films applicable for the fabrication of high performance MLCC’ funded by the Ministry of Knowledge Economy (MKE, Korea) .
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering