[ ] is usually added as shifters in order to move the of to lower temperatures because it is well established that the of decreases linearly with a solid solution of in place of . It is not fully understood yet, however, how influences on the peak value of the dielectric constant at the of . This research reports the effect of addition on εmax at the of ceramics. Based on the chemical composition and the grain size dependence of the dielectric property of ceramics, functionally graded composites were designed and fabricated. Multi-layered composites with a compositional gradient of exhibited a low temperature coefficient and high dielectric constant in a wide temperature range.

• Jeon
• Jae-Ho