Reply to ’Comment on ’’A systematic experimental and theoretical investigation of the grain-boundary resistivities of n-doped BaTiO3 ceramics’’ ’

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Abstract
The recently published conclusion that Heywang’s model sufficiently describes the electrical resistivities and current‐voltage characteristics of a set of equally prepared PTC‐type BaTiO3 ceramics was called in question by Hoffmann. In his criticism, Hoffmann also discussed why he considers his PTC model, which includes intergranular second‐phase layers, to be the more adequate interpretation. In the following, we answer his objections and strengthen our own conclusions. Furthermore, the reasons for our disagreement with the experimental interpretations and the theoretical assumptions underlying the intergranular second‐phase layer model are briefly discussed.