I currently have 100 grams of lithium hydride powder that needs to be held in a solid form. Initially, I was considering using cement, however, the moisture require converts the lithium hydride to lithium hydroxide. What would another moisture-free agent be that I could use for this task?

If it helps, the lithium hydride and the solidifying agent are to be used for neutron moderation.

  • 1
    $\begingroup$ How strong does the solid have to be, and what elements would be compatible, in terms of neutron cross-section?Paraffin wax has just H and C, but is not very strong. Seal it in polyethylene or polypropylene? $\endgroup$ – DrMoishe Pippik Jan 27 at 23:12
  • $\begingroup$ From what I remember, molten $\ce{LiH}$ is just poured under inert atmosphere into a container of the appropriate form, which is sealed later (or used in bulk – in aerospace industry). But it seems like you need some sort of a homogeneous solid matrix to keep $\ce{LiH}$ intact under ambient conditions, is it true? $\endgroup$ – andselisk Jan 27 at 23:20
  • $\begingroup$ Yes, you are correct. $\endgroup$ – Super Nerds Team Jan 27 at 23:26

If the LiH needs to be exposed to ambient conditions, it should be enclosed is a moisture-impermeable container, e.g., a glass ampoule which is closed off. Glass can be blown quite thin - but then you need to be quite careful. As DrMoishe suggested, PE or PP would be good, but I'm thinking of it as a closed tube, not as a binder.


Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.