Dielectric properties of sol-gel prepared Ni-doped CaCu_3Ti_4O_(12) ceramics

摘要

Dielectric properties of sol-gel prepared Ni-doped calcium copper titanate Ceramics (CCNTO) are investigated. For the x of CaCu_3Ni_xTi_4O_(12+x) is 0, 0.1, 0.2, 0.3 respectively. The XRD pattern shows that crystal structure of the sample without Ni is basically single-phase. The dielectric properties of CCNTO were analyzed by Agilent 4294A. The experimental results show that the sample has a better dielectric properties when x=0.2. The maximum dielectric constants is found when x=0.2. The dielectric loss decreased with the increases of Ni in the low frequency region, the high frequency region is just the opposite, the sample has lower dielectric loss in the low frequency region when x=0.2.