Negative thermal expansion liquid

[DarekN]

Hello,

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

Thanks,
Darek

 

[Latexman]

Negative Thermal Expansion

Good luck,
Latexman

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

 

[LittleInch]

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_expansion

Also why?

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

 

[DarekN]

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

 

[EdStainless]

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

 

[DarekN]

Yes.

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

Thanks!

 

[LittleInch]

Would you also like an elixir of eternal life??

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

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

 

[DarekN]

Where could I find such shelf?

Just kidding, thanks for an answer

 

[LittleInch]

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.

 

[gerhardl]

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?