Abstract
Dielectric properties of Ca 1− x (Li 1/2Nd 1/2) x TiO 3 (0.0≤ x≤0.6, CLNT) and [Ca 0.6(Li 1/2Nd 1/2) 0.4] 1− y Zn y TiO 3 (0.5≤ y≤1.0, CLNZT) ceramics were investigated at 4–10 GHz. For the CLNT system, a single perovskite phase was detected in the entire composition range. The dielectric constants ( K), and the temperature coefficients of the resonant frequency (TCF) were dependent on the B-site bond valence. Qf value decreases with the increase in (Li 1/2Nd 1/2)TiO 3 content ( x) due to a decrease in grain size. For the CLNZT system, Qf value and TCF were improved with Zn content ( y) due to the formation of Zn 2TiO 4. Typically, K of 47, Qf of 13 000 GHz, TCF of 14 ppm per °C were obtained for [Ca 0.6(Li 1/2Nd 1/2) 0.4] 0.4Zn 0.6TiO 3 sintered at 1150 °C for 4 h.
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