Molten salts have been used to good effect.

The net mass of the fused atomic nuclei is smaller than the sum of the constituents.

Yotar, the molten core underneath the Earth's crust is rising to the surface.

The machine then scribbles with that molten plastic onto a flat plate to make a layer of the object that's to be build.

Another possibility is to use a phase change material as thermal storage where latent heat is used to store energy.

Use existing multilateral mechanisms, such as intelligence fusion cells, to help remove structural obstacles to enhance the timely sharing of information.

Because of the lack of impurities in the leftover regions which solidify, the boule can grow as a perfect single crystal if a seed crystal is placed at the base to initiate a chosen direction of crystal growth.