Patent ID: 7431755
Filing Date: 2008-10-07
Classification: B03C

Abstract:
1. A dust-collecting electrode having two or more of unit electrodes facing each other, wherein at least one unit electrode of the unit electrodes facing each other comprises: a ceramic dielectric body composed of ceramic, a surface conductor disposed so as to cover at least a part of the surface of the ceramic dielectric body on the side where the one unit electrode and the other unit electrode face each other, and an internal conductive layer disposed inside the ceramic dielectric body and being electrically independent of the surface conductor, the dust-collecting electrode being capable of generating an electric field and silent discharge between the unit electrodes facing each other by applying voltage between the surface conductor of the one unit electrode and the other unit electrode facing the one unit electrode on the side where the surface conductor is disposed and generating creeping discharge on the surface of the one unit electrode and a creeping discharge region between the unit electrodes by applying voltage between the surface conductor of the unit electrode and the internal conductive layer via the ceramic dielectric body, said dust-collecting electrode having a passage for gas containing dust located between the unit electrodes, wherein the dust contained in the gas is electrostatically collected by the electric field in the creeping discharge region.