Phenomenological model of grain boundary behaviour under a bias field in Nb-doped CaCu3Ti4O12 ceramics

Dielectric relaxation and giant dielectr

Dielectric relaxation and giant dielectric constant of Nb-doped CaCu3Ti4O12ceramics under dc bias voltage

✍ Liu, Peng ;He, Ying ;Zhou, Jian-ping ;Mu, Chun-hong ;Zhang, Huai-wu 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 582 KB

## Abstract CaCu~3~Ti~4–__x__~ Nb__~x~__ O~12~ (__x__ = 0, 0.01, 0.08, 0.2) ceramics were fabricated by a conventional solid‐state reaction method. The ceramics showed the body‐centered cubic structure without any foreign phases and the grain size decreases with Nb doping. Two Debye‐type relaxation