Density of a material of course changes with temperature. I am planning to run a numerical simulation which involves melting of phase change material. I need density data at certain points to input the numerical model to get more exact results.
Hakeem, please read my answer relevant to your question about measuring coefficients of thermal expansion. In the present case, you’ll have to find around the same TMA instrument furnished with a dilatometer attachment. Then the density measurement, and the thermal dependence thereof is straightforward.
Dear Hakeem,
Actually you need equation state of solid materials. With these type of equation you can relate volume to temperature in constant pressure (1 atm). Then by using variable volume you can predict density because your mass is constant.
The most famous Equations of state are:
- Rose–Vinet equation of state
- Murnaghan equation of state
- Birch–Murnaghan equation of state
- Johnson–Holmquist equation of state
- Mie-Gruneisen equation of state
Hakeem, please read my answer relevant to your question about measuring coefficients of thermal expansion. In the present case, you’ll have to find around the same TMA instrument furnished with a dilatometer attachment. Then the density measurement, and the thermal dependence thereof is straightforward.
again (as for the thermal expansion) it depends if you want the value for the material (intrinsic property) or for a given specimen.
If you want the intrinsic properties the only way is to use X-ray diffraction (XRD): it is non contact, non destructive and the accuracy can go down to the order of 10^-5 A. Actually powder XRD should work well. Actually you can follow the material from liquid helium up to well above the melting point and you can even get information about the atomic distribution there.
If you are interested in the properties of a given specimen then you can also consider dilatometry (or a TMA). However, unless you have a single crystal, you will get average values (crystallographic average weighed over the orientation distribution function of the material) in which the grain boundaries and the voids can also play a role.
It depends on the applications: metallurgists are more interested in the dilatometric (let's call them engineering) values, physicists on the intrinsic ones.
From my knowledge...Density of inorganic salts will not change with change in Temp...It happens only in the case of Solvents and Liquid inorganic salts.........So Pls cross check before further proceeding.....
Matteo Leoni got it right! NDE XRD all the way from liquid He to above melting point of the inorganic compound with potentially Femtometer precision in real time. Observe the Nano structure in real time with XRD Microscopy! Refer to: http://www.flickr.com/photos/85210325@N04/10515372183/
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