Russian and Chinese scientists have, for the first time in the world, synthesized a new material based on the mineral sodalite that does not change its structure even at extremely low and extremely high temperatures, and can be used in space optics, laser systems, and power installations.

For the first time, a material with zero thermal expansion has been obtained that does not change its structure or dimensions across a wide temperature range, from minus 262.15 degrees Celsius, 11 kelvin, to plus 826.85 degrees, 893 kelvin, noted Maxim Molokeev, senior researcher at the International Research Center for Spectroscopy and Quantum Chemistry of Siberian Federal University.

Such a wide temperature range is unique for materials with zero thermal expansion.

The practical significance of the work is enormous. CASO is an ideal candidate for creating ultrastable optical devices operating in extreme conditions: high-precision laser systems, optical frequency combs, astronomical instruments, satellite navigation systems, and advanced lithography systems. The unique combination of properties in the resulting material opens the way to developing next-generation devices that are practically insensitive to temperature fluctuations.

The scientists’ plans include creating a material that works in practically any conditions known to humanity. Their efforts may be directed toward expanding the temperature range to even higher or lower temperatures.