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Topic: Negative thermal expansion liquid  (Read 4461 times)

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Offline DarekN

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Negative thermal expansion liquid
« on: September 28, 2017, 07:59:47 AM »
Hello,

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

Thanks,
Darek

Offline Arkcon

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Re: Negative thermal expansion liquid
« Reply #1 on: September 28, 2017, 08:55:21 AM »
Yes.  Much of the planet Earth contains water, which is available at a reasonable price in most areas.  Water expands between the temperature of 3.98 °C down until 0 °C, when it freezes. https://en.wikipedia.org/wiki/Water#States

I'm going to assume you already knew about water.  But I bring it up because you didn't trouble yourself to mention: how much expansion, and over what temperature range do you mean.  The alloy called Wood's metal also expands when cooled.  And a number of other composite solids as well.  https://en.wikipedia.org/wiki/Negative_thermal_expansion#Materials

If water and these materials aren't what you're looking for, you have to tell us why.
Hey, I'm not judging.  I just like to shoot straight.  I'm a man of science.

Offline DarekN

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Re: Negative thermal expansion liquid
« Reply #2 on: September 28, 2017, 09:09:44 AM »
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 (and still be a liquid). I would like to have it in "room temperature / conditions".

Is now everything okay? :D

Offline billnotgatez

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Re: Negative thermal expansion liquid
« Reply #3 on: September 29, 2017, 11:41:06 AM »
@DarekN
What did your GOOGLE search turn up for
Quote
zero thermal expansion liquid

Offline Enthalpy

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Re: Negative thermal expansion liquid
« Reply #4 on: October 10, 2017, 07:46:21 AM »
If you have such a solid, you can make a suspension of it in a liquid. Maybe the suspension fulfils your wishes?

And what if the expansion of the container matches that of the liquid? Solid polymers tend to expand much.

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