Chemical Forums

Specialty Chemistry Forums => Materials and Nanochemistry forum => Topic started by: DarekN on September 28, 2017, 07:59:47 AM

Title: Negative thermal expansion liquid
Post by: DarekN 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
Title: Re: Negative thermal expansion liquid
Post by: Arkcon 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.
Title: Re: Negative thermal expansion liquid
Post by: DarekN 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
Title: Re: Negative thermal expansion liquid
Post by: billnotgatez on September 29, 2017, 11:41:06 AM: @DarekN
What did your GOOGLE search turn up for
Quote
zero thermal expansion liquid
Title: Re: Negative thermal expansion liquid
Post by: Enthalpy 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.