The sintering temperature of the LiAlSiO4(LAS) ceramics, which exhibited the microwave dielectric properties of εr = 4.8, Q × f = 36 000GHz, and Tf=8.0 ppm/°C, decreased below 960°C when B2O3 was added. The B2O 3-related liquid phase was formed and assisted the densification of the LAS ceramics at low temperatures. The average grain size of the specimen sintered at 950°C increased with the addition of B2O3 but decreased when B2O3 exceeded 12.0 mol%, probably due to the presence of a large amount of liquid phase. The LAS ceramics containing 12.0 mol% of B2O3 sintered at 950°C exhibited the excellent microwave dielectric properties of εr = 5.3, Q×f = 212 000GHz and Tf =-7.7 ppm/°C.
|Number of pages||4|
|Journal||Journal of the American Ceramic Society|
|Publication status||Published - 2011 Jul|
ASJC Scopus subject areas
- Ceramics and Composites
- Materials Chemistry