Deepa, M; Prabhakar Rao, P; Radhakrishnan, A N; Sibi, K S; Peter Koshy
(Elsevier, 2009-07-01)
A new series of pyrochlore type ceramic semiconducting oxides in Ca–Ce–Ti–M–O (M = Nb or Ta) system has been synthesized by the conventional ceramic route. The electrical conductivity measurements show that these oxides ...