(Mg 1-xZn x) 1.8Ti 1.1O 4 (x=0.03-1.00) ceramics were prepared via the conventional solid-state method and their dielectric properties were investigated in the microwave frequency region. Formation of solid solutions was confirmed by the X-ray diffraction analysis, the EDX analysis, and the measured lattice parameters. A small amount of Zn substitution for Mg produced a large increase in Q×f due to a high packing fraction as well as a high relative density of the ceramics. By increasing x from 0.00 to 0.06, the Q×f of the specimen could be tremendously improved from 141,000 to a maximum of 210,700GHz (at 10.52GHz), demonstrating an unique potential for low-loss microwave applications. The τ f values were found to retain in the range from -54.2 to -62.3ppm/°C for all compositions because the resultant change of unit cell volume was small. Also, a remarkable lowering of the sintering temperature down to ~300°C was observed when Mg was totally substituted by Zn, thereby making it possible for low firing applications.
|Number of pages||7|
|Journal||Journal of the European Ceramic Society|
|Publication status||Published - 2012 Aug 1|
All Science Journal Classification (ASJC) codes
- Ceramics and Composites
- Materials Chemistry