Discussion Overview
The discussion revolves around the feasibility of using JB Weld epoxy for constructing high voltage vacuum feedthroughs made from alumina. Participants explore the electrical properties of JB Weld in relation to vacuum applications and high voltage requirements.
Discussion Character
- Exploratory
- Technical explanation
- Debate/contested
Main Points Raised
- One participant proposes using JB Weld to epoxy alumina pieces together for high voltage feedthroughs, citing reports of its effectiveness in vacuum applications.
- Another participant requests a drawing of the feedthrough design and inquires about the specific vacuum level being maintained.
- A participant clarifies that the vacuum level is 10-4 torr and emphasizes the concern about whether the voltage could bridge through the epoxy to the vacuum chamber or nearby objects.
- One participant shares a link to JB Weld's technical data sheets, suggesting that specifications may be relevant.
- Another participant advises caution, stating that without knowing the dielectric strength of JB Weld or testing it at higher voltages, it may not be advisable to use it. They also question the necessity of building a custom feedthrough when commercially available options exist.
Areas of Agreement / Disagreement
Participants express differing views on the suitability of JB Weld for high voltage applications, with some advocating for its use based on anecdotal evidence while others emphasize the need for caution and testing. The discussion remains unresolved regarding the appropriateness of JB Weld in this context.
Contextual Notes
There is uncertainty regarding the dielectric strength of JB Weld and its performance under high voltage conditions. The discussion does not resolve whether the epoxy can safely insulate against the specified voltages.