Patent ID: 6375533
Filing Date: 2002-04-23
Classification: H01J

Abstract:
An electrical insertion body for a tube lamp for hermetic sealing of sealing tubes connected to an arc tube of the tube lamp, in which one upholding part of an electrode is inserted into a center opening of a respective sealing body formed of a functional gradient material which includes an electrically conductive inorganic material component and a dielectric inorganic material component and which is shaped in the form of a multilayer column such that the ratio of the electrically conductive inorganic material component and the dielectric inorganic material component changes gradually in the axial direction, comprising:a diffusion area formed in the boundary areas between the sealing body and the upholding part of the electrode, said diffusion area including a diffused combination of the electrically conductive inorganic material component which forms the sealing body, a metallic component of the upholding part of the electrode and a diffusion accelerator, the diffusion area adapted to accelerate diffusion of the electrically conductive inorganic material component which forms the sealing body and of the metallic component of the upholding part of the electrode at a sintering temperature of the functional gradient material to cause joining of the upholding part of the electrode and an inside portion of the center opening of the sealing body.