| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1478363 | Journal of the European Ceramic Society | 2006 | 4 Pages |
Abstract
The microwave dielectric properties of alumina (Al2O3) ceramics were studied. The objectives were to improve the large negative temperature coefficient of the resonant frequency (τf) of Al2O3 ceramics and to obtain a relatively large quality factor (Qf) through the addition of rutile (TiO2), which has a large positive τf, and an annealing treatment. A near-zero τf (+1.5 ppm/°C), excellent Qf (148,000 GHz) and ɛr (12.4) were obtained in 0.9 Al2O3–0.1 TiO2 ceramics sintered at 1350 °C for 2 h, followed by annealing at 1100 °C for 12 h in air.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Yasuharu Miyauchi, Yoshihiro Ohishi, Sinya Miyake, Hitoshi Ohsato,