| 主权项 |
1. A feed-through element for harsh environments, comprising:
a support body with an access opening; at least one functional element is arranged in the access opening; and an electrically insulating fixing material securing the at least one functional element in the access opening and electrically insulating the at least one functional element from the support body, wherein the electrically insulating fixing material contains a glass or a glass ceramics and the glass or glass ceramics comprises in mole % on oxide basis: SiO2 25-55, B2O3 0.1-15, Al2O3 0-15, MO 20-50, and M2O 0-<2, wherein MO is selected from the group consisting of MgO, CaO, SrO, BaO, and any combinations thereof, wherein M2O is selected from the group consisting of Li2O, Na2O, K2O, and any combinations thereof, wherein the electrically insulating fixing material has a CTE that is smaller than a CTE of the support body, whereby at least at room temperature the support body exerts an additional holding pressure to the electrically insulating fixing material, and wherein the electrically insulating fixing material has an electrical insulation resistivity of at least 500 MΩ at an operation temperature of 260° C. |
