With the addition of 0.5wt% V2O5, the (Bi1-xSmx)NbO4 (x= 0.05, 0.10, and 0.15) ceramics can be densified around 920oC. As the sintering temperatures increase from 920oC to 1020oC, the crystal phases of (Bi1-xSmx)NbO4 ceramics change from the α(orthorhombic)-phase to the β(triclinic)-phase. As x increases from 0.05 to 0.15, the temperature for the α-(Bi1-xSmx)NbO4 phase to disappear is shifted from 1000oC to 980oC and the temperature for the β-(Bi1-xSmx)NbO4 phase to appear is shifted from 960oC to 940oC. The saturated dielectric constants (r) of (Bi1-xSmx)NbO4 ceramics show no apparent change with the increase of sintering temperatures. The saturated quality values (QXf) first increase, reach a maximum at 1000oC~ 1020oC, then slightly decrease with the increase of sintering temperatures. And we will show that the sintering temperatures also have large influence on temperature coefficients of resonant frequency (τf).
關聯:
The Sixth China International Conference on High-Performance Ceramics programme Book and Abstracts 2009 China International Conference on High Performance Ceramic (CICC-6)
