In Mg 2 + -substituted YCrO 3 , single-phase perovskite compounds Y(Cr 1 - x Mg x )O 3 , where x=0-0.1, have been formed at low temperatures (~850 o C) by decomposition of Y(Cr 1 - x Mg x )O 4 which crystallizes at ~600 o C from amorphous materials prepared by the hydrazine method. Y(Cr 1 - x Mg x )O 3 powders consisting of submicrometer-size particles are sinterable; dense ceramics can be fabricated by sintering for 4 h at 1800 o C under atmospheric pressure. The relative densities, grain sizes, and electrical conductivity increase with increased Mg 2 + -content. Y(Cr 0 . 9 Mg 0 . 1 )O 3 ceramics show a good electrical conductivity at elevated temperatures.