FORMATION AND SINTERING OF LACRO3 PREPARED BY THE HYDRAZINE METHOD

Sinterable LaCrO3 powder consisting of submicron particles (approximat e to 0.2 mu m) has been obtained at low temperatures (approximate to 8 50 degrees C) by decomposition of LaCrO4, which crystallizes at 495 de grees C, from an amorphous material prepared by the hydrazine method. Powder characterization is examined. Dense LaCrO3 ceramics (93.9% of t heoretical) with small grains (approximate to 2.1 mu m) can be fabrica ted by sintering for 2 h at 1600 degrees C without any control of oxyg en pressure. They show a high electrical conductivity of 108 S.m(-1) a t 1000 degrees C. (C) 1998 Elsevier Science Ltd.