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Abstract
Microwave dielectric properties of (Pb0.4Ca0.6)((Fe0.5Nb0.5)1−xTix)O3 system have been investigated as a function of the amount of Ti+4 substitution (0.01 ≤ X ≤ 0.15). The dielectric constant was increased with increase of Ti content and the Qf showed a maximum value 8200 GHz at x = 0.1, then decreased with Ti content. The temperature coefficient of resonant frequency (TCF) can be adjusted from negative value of-14 ppm/°C to positive value of +21 ppm/°C with Ti content. This change could be explained by the change of tolerance factor with increasing Ti content. Typical value of K = 91, Qf=8100GHz and TCF = +7ppm/°C were obtained for X = 0.1.