| abstract |
A gas-sensor element for detecting oxidizable gases and vapors such as alcohols for carbon monoxide, which is characterized by comprising a complex metal oxide having the K2MgF4-type crystal structure and represented by the general formula A2-xA'xBO4- delta , wherein A is at least one element selected from the group consisting of rare earth elements of the atomic numbers from 57 to 71, yttrium, and hafnium, A' is at least one element selected from the group consisting of alkaline earth metals and lithium, B is at least one element selected from the group consisting of transition elements of the atomic numbers from 21 to 30, 0 is oxygen, x is in the range of 0</=x</=2, and delta is a nonstoichiometric parameter. |