PREPARATION OF CAPACITIVE-TYPE CO2GAS-SENSITIVE ELEMENT USING NANOMETER POWDERS
(Department of Metallurgy,Central South University of Technology, Changsha 410083, P. R. China)
Abstract: Nanometer BaTiO3and CuO powders were prepared by means of mechanophysical solid phase effects and powder metallurgy technology. A capacitive-type gas-sensitive element was made from those two powders, the results of gas-sensitive characteristics indicate that the element has good sensitivity to CO2 gas. XRD and SEM analyses show that the element is just a homogeneous functional composite which is made from two phases by simply mechanical mixing.
Key words: nanometer powder CuO-BaTiO3capacitive element gas-sensitive characteristic