Patent ID: 6481264
Filing Date: 2002-11-19
Classification: C01G,C01P,G01N

Abstract:
A method comprising exposing a solid-state composition to a gas, wherein the composition is:(1) a ternary oxide of the formula Cr2âˆ’x(M1zM21âˆ’z)xO3 with M1=Fe or Mn, M2=Fe, Mn or Al, 0.005&lE;x&lE;1.95 and 0.005&lE;z&lE;0.995; or (2) a ternary oxide of the formula Cr2âˆ’x(M1zM21âˆ’z)xO3 with M1=Fe or Mn, M2=Ti and 0.005&lE;x&lE;1.95, 0.005&lE;z&lE;0.45; or (3) a quaternary or quinternary oxide of the formula Cr2âˆ’x((M1aM2bM3c)zM41âˆ’z)xO3 with M1=Fe, M2=Mn, M3=Al and M4=Ti,and 0&lE;a,b,c&lE;1, 0.005&lE;x&lE;1.95, and 0.005&lE;z&lE;0.45; and sensing an electrical response of said composition to said gas.