Calcium-doped yttrium chromite was additionally doped with various transition metals on B-site to improve the sintering, thermal behavior, and electrical properties for use as an interconnect material in solid oxide fuel cells. With 10% B-site addition of Co, Cu, Ni, Fe, and Mn, the orthorhombic perovskite structure remained stable over a wide range of oxygen partial pressures. The substitution of Cu for chromium remarkably improved the sinterability and the substitution of Co and Ni significantly improved the electrical conductivity. Fe substitution slightly improved sinterability and electrical conductivity, and Mn doping had a negative effect on those properties. (C) 2010 The Electrochemical Society. [DOI: 10.1149/1.3456525] All rights reserved.