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Negative thermal expansion liquid

Negative thermal expansion liquid

(OP)
Hello,

Is it possible to manufacture (or buy) a liquid that has negative coefficient of thermal expansion (expands while cooled) ?

Thanks,
Darek

RE: Negative thermal expansion liquid

Negative Thermal Expansion

Good luck,
Latexman

To a ChE, the glass is always full - 1/2 air and 1/2 water.

RE: Negative thermal expansion liquid

Water ( from 4 C to 0C) and after/ below 0C it definitely expands....

You need to give a bit more about what sort of temperature range you're looking at and what sort of expansion you want.

From this small piece It looks like it's a pretty limited set of substances...

https://en.wikipedia.org/wiki/Negative_thermal_exp...

Also why?

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Negative thermal expansion liquid

(OP)
I am interested to have a "container" with water mixed with this negative thermal expansion liquid (in right proportions) to obtain a mix that has 0 thermal expansion coefficient. I would like to have it in "room temperature / conditions".

Thanks

RE: Negative thermal expansion liquid

So for a limited range (+/- a few C?) near RT you want zero CTE?
And you are making the container out of something with zero CTE also? (caution, Invar rusts)
You are discovering why people do this with expansion tanks, check valves and back pressure regulators.
There is no safe, simple, stable, water based ZCTE solution.

= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube

RE: Negative thermal expansion liquid

(OP)
Yes.

The container is made of rubber (unfortunately positive CTE).

Thanks!

RE: Negative thermal expansion liquid

Would you also like an elixir of eternal life??

Think the two substances will be on the same shelf... pipe

Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Negative thermal expansion liquid

(OP)
Where could I find such shelf?

Just kidding, thanks for an answer :D

RE: Negative thermal expansion liquid

Maybe this stuff (sorry it is a Friday...)



Remember - More details = better answers
Also: If you get a response it's polite to respond to it.

RE: Negative thermal expansion liquid


Hello DarekN!

When we engineers have a problem, and then find a possible solution, and after research the solution does not work, we have to get back to start.

So what is your real problem?

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