The air-sintering characteristics and thermal expansion behaviors in the La1-xSrxCr0.9Ti0.1-yCoyO3 (0.15 less than or equal to x less than or equal to 0.20 and 0 less than or equal to y less than or equal to 0.02) and La0.8Sr0.2Cr1-xTi0.1MxO3 (M = V and Ni; 0 less than or equal to x less than or equal to 0.05) systems have been investigated as an interconnect material in high-temperature solid oxide fuel cells (SOFCs). With the exception of La0.8Sr0.2Cr0.85Ti0.1V0.05O3, all samples showed a single perovskite phase with the hexagonal symmetry. La0.8Sr0.2Cr0.85Ti0.1V0.05O3 contained a very small amount of Sr-3(VO4)(2). The V, Co, and Ni doping in the La0.8Sr0.2Cr0.9Ti0.1O3-based perovskite enhanced their air-sintering characteristics, and in particular, the V-doped samples with a V content of 0.02 less than or equal to x less than or equal to 0.05 reached greater than or equal to90% relative density after treatment at 1600degreesC for 20 h. It was found that the V doping in the perovskites had a tendency to decrease an isothermal expansion under a H-2 atmosphere. Thus, La0.8Sr0.2Cr0.9xTi0.1VxO3 perovskites (0.02 less than or equal to x less than or equal to 0.05) is a promising candidate for interconnect in high-temperature solid oxide fuel cells.