Patent Number: 
Section: claims

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; andan 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 with a volume resistivity of greater than 1.0×1010 Ωcm at the temperature of 350° C. and said glass or glass ceramics comprises in mole % on oxide basis:SiO2 25-55,B2O30.1-15,Al2O3  0-15,MO 20-50, andM2O  0-<2,wherein MO is selected from the group consisting of MgO, CaO, SrO, BaO, and any combinations thereof, andwherein M2O is selected from the group consisting of Li2O, Na2O, K2O, and any combinations thereof. 2. The feed-through element according to claim 1, wherein the electrically insulating fixing material has an electrical insulation resistivity of at least 500 MΩ at an operation temperature of 260° C. 3. The feed-through element according to claim 1, wherein the at least one functional element is selected from the group consisting of an electrical conductor, a waveguide, a cooling-fluid line, a housing of a thermo element, and a hollow element which carries further functional elements. 4. The feed-through element according to claim 1, wherein the electrically insulating fixing material fixes the at least one functional element within the access opening to withstand pressures in excess of 42000 psi at an operational temperature of 260° C. 5. The feed-through element according to claim 1, wherein the electrically insulating fixing material hermetically seals the access opening. 6. The feed-through element according to claim 1, wherein the electrically insulating fixing material has a CTE that matches a CTE of the support body. 7. The feed-through element according to claim 1, 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. 8. The feed-through element according to claim 1, wherein the support body is made from a ceramic selected from the group consisting of Al2O3 ceramics, stabilized ZrO2 ceramics, Mica, and any combinations thereof. 9. The feed-through element according to claim 1, wherein the support body is made from a metal selected from the group consisting of stainless steel SAE 304 SS, stainless steel SAE 316 SS, Inconel, and alloys or combinations thereof. 10. The feed-through element according to claim 1, wherein the functional element comprises a metal material selected from the group consisting of Beryllium Copper, Nickel-Iron Alloy, Kovar, Inconel and alloys or combinations thereof. 11. The feed-through element according to claim 1, wherein the functional element consists essentially of Beryllium Copper and the support body consists essentially of stainless steel SAE 304 SS or stainless steel SAE 316 SS. 12. The feed-through element according to claim 1, wherein the functional element consists essentially of Nickel-Iron Alloy and the support body consists essentially of 304 SS or Inconel. 13. The feed-through element according to claim 1, further comprising a connector element consisting essentially of Kovar, wherein the support body consists essentially of Inconel. 14. The feed-through element according to claim 1, further comprising a connector element consisting essentially of Inconel, wherein the support body consists essentially of Inconel. 15. The feed-through element according to claim 1, wherein the glass or glass ceramic comprises in mole % on oxide basis:SiO235-50,B2O3 5-15,Al2O3 0-5,MO30-50, andM2O 0-<1. 16. The feed-through element according to claim 1, wherein the glass or glass ceramic comprises in mole % on oxide basis:SiO235-50,B2O3 5-15,Al2O3 0-<2,MO30-50, andM2O 0-<1. 17. The feed-through element according to claim 1, wherein the glass or glass ceramic is essentially free of materials selected from the group consisting of M2O, PbO, fluorines, and any combinations thereof. 18. The feed-through element according to claim 1, wherein the glass or glass ceramic additionally comprises in mole % on oxide basis:ZrO20-10,Y2O30-10, andLa2O30-10. 19. The feed-through element according to claim 1, wherein the glass or glass ceramic comprises up to 30% of volume of fillers. 20. The feed-through element according to claim 19, wherein the fillers are selected from the group consisting of ZrO2, Al2O3, MgO, and any combinations thereof. 21. The feed-through element according to claim 1, wherein the access opening has an inner access opening wall with a structure that prevent movement of the electrically insulating fixing material in relation to the support body. 22. The feed-through element according to claim 1, wherein the access opening has at least a region with a cylindrical or truncated profile. 23. The feed-through element according to claim 1, further comprising a connector element having a structure that prevents movement of the connector element in relation to the electrically insulating fixing material and the support body when pressure is exerted on the feed-through element. 24. A downhole oil and/or gas drilling or exploration device comprising the feed-through element according to claim 1. 25. A containment of an energy generation or energy storage device comprising the feed-through element according to claim 1. 26. A containment of a reactor or storage device of toxic and/or harmful matter comprising the feed-through element according to claim 1. 27. A spacecraft or space rover vehicle comprising the feed-through element according to claim 1. 28. A sensor or actuator being encapsulated within a housing comprising the feed-through element according to claim 1.