Significant improvements on sintering characteristic and electrical performance of traditional interconnect La0.7Ca0.3CrO3-delta were presented in this paper. For a composite interconnecting ceramic La0.7Ca0.3CrO3-delta/Ce0.8Nd0.2O1.9, it was found that the addition of Ce0.8Nd0.2O1.9 significantly increased the electrical conductivity of La0.7Ca0.3CrO3-delta both in air and in hydrogen. Among all the investigated specimens. La0.7Ca0.3CrO3-delta with 5 wt% Ce0.8Nd0.2O1.9 possessed the maximal electrical conductivity. In air and hydrogen, the maximal electrical conductivity at 800 C were 55.4 S cm (1) and 5.0 S cm (1), respectively, which increased significantly as compared with La0.7Ca0.3CrO3-delta under the same conditions. With the increase of Ce0.8Nd0.2O1.9 content the relative density increased, reaching 97.1% from 93.9% of La0.7Ca0.3CrO3-delta. This indicated that Ce0.8Nd0.2O1.9 functioned as all effective sintering aid in enhancing the sinterability of the powders. The average coefficient of thermal expansion 30-1000 C in air increased with Ce0.8Nd0.2O1.9 content. Most coefficients of thermal expansion of specimens are compatible with other cell components. The oxygen permeation measurement illustrated a negligible oxygen ionic conduction, indicating it is still in electronically conducting ceramic. Results indicate that this composite is suitable to be used as a high-performance interconnect for intermediate temperature solid oxide fuel cells. (C) 2009 Elsevier B.V. All rights reserved.