Feedthrough device for high-temperature molten salt environments, use of a feedthrough device and an electrochemical sensor device

The feedthrough device with compressible graphite gaskets and ceramic spacers addresses thermal expansion and seal degradation issues, ensuring reliable electrical connections and measurements in high-temperature, corrosive molten salt systems.

WO2026087006A9PCT designated stage Publication Date: 2026-07-09COPENHAGEN ATOMICS AS
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
COPENHAGEN ATOMICS AS
Filing Date
2025-10-22
Publication Date
2026-07-09

AI Technical Summary

Technical Problem

Existing feedthrough devices face challenges in high-temperature and highly corrosive environments, such as molten salt systems, due to material thermal expansion differences, hermetic seal degradation, and unreliable electrical connections.

Method used

A feedthrough device with compressible graphite gaskets and ceramic spacers that accommodate differential thermal expansion, maintaining a hermetic seal and robust electrical connections using a sealing body with flanges and tapered feedthrough holes.

Benefits of technology

The device provides a reliable hermetic and electrically insulated connection capable of withstanding high temperatures and corrosive conditions, allowing for accurate electrochemical measurements and efficient electrical connections in molten salt environments.

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Abstract

A feedthrough device (1) for providing a hermetic and electrically insulated electrical connection between an external environment (2) and a high-temperature molten salt internal environment (3). The device comprises a sealing body (4) configured to be arranged in a wall separating the environments, at least one electrical conductor (5) extending through the sealing body, each electrical conductor having a seat (6) with an enlarged diameter, electrically insulating spacers (7) positioned on both sides of the seat along the electrical conductor, and gaskets (10) disposed hermetically between the spacers (7), the seat (6), and the sealing body (4). The gaskets (10) are compressible and provided with sliding surfaces for allowing relative movement between contacting materials with differential thermal expansion coefficient while maintaining a sealing contact.
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