Abstract: A sol-gel processing was used to synthesize (Ca_0.61,Nd_0.26)TiO₃ (CNT) nanoparticles doped with Li-Cu-B at low temperature. Orthorhombic perovskite structure phase with a small amount of Li₃BO₃ secondary phase was formed by calcining the xerogels at 300°C, and monodisperse CNT nano-powders with the grain size of 10−15 nm could be obtained. By using these nanocrystalline CNT powders, dense CNT ceramics could be achieved at the low sintering temperature of 1100°C due to the effect of the small size nanoparticles and liquid phase Li₃BO₃. And the dielectric properties with dielectric constant (ε_r= 89.52), quality value factors with frequency (Q£f=17148 GHz) and the temperature coefficient of resonant frequency (τ_f ) value of +239×10^-6/°C were achieved.

Key words: Sol-gel preparation, Nanomaterials, Electrical properties, Sintering