*Member, American Ceramic Society.
High-Q Microwave Dielectric Materials Based on the Spinel Mg2TiO4
Article first published online: 30 AUG 2006
Journal of the American Ceramic Society
Volume 89, Issue 11, pages 3441–3445, November 2006
How to Cite
Belous, A., Ovchar, O., Durilin, D., Krzmanc, M. M., Valant, M. and Suvorov, D. (2006), High-Q Microwave Dielectric Materials Based on the Spinel Mg2TiO4. Journal of the American Ceramic Society, 89: 3441–3445. doi: 10.1111/j.1551-2916.2006.01271.x
P. Davies—contributing editor
- Issue published online: 12 SEP 2006
- Article first published online: 30 AUG 2006
- Manuscript No. 21552. Received March 6, 2006; approved June 27, 2006.
Composite ceramics based on the spinel Mg2TiO4 were prepared by a conventional mixed-oxide route. To achieve the temperature stabilization of the dielectric constant, each of the composites was added with 7 mol% CaTiO3. The effect of the substitution of isovalent Co for Mg on the microstructure and the microwave dielectric properties of the composite ceramics was also investigated. A maximum Q×f value of around 150–160 THz was obtained for the undoped Mg2TiO4, whereas a reduced Q×f value was observed for an increase in the Co concentration in the system (1−x)Mg2TiO4−xCo2TiO4. Upon doping with 7 mol% CaTiO3, the Q×f value passed through a maximum with increasing Co concentration. Adding ZnO–B2O3 to the composite system based on Co-doped Mg2TiO4 resulted in a reduction of the sintering temperature by 150°–200°C without any significant degradation in the Q×f value.