A new ‘golden’ age for electronics?

Science Daily  June 25, 2019
One way that heat damages electronic equipment is by making components expand at different rates, resulting in forces that cause micro-cracking and distortion. The valence fluctuations of Sm in samarium monosulfide (SmS) are known to induce possible large isotropic negative thermal expansion (NTE). Researchers in Japan prepared Ce-doped and Nd-doped SmS polycrystalline samples using a simpler method with much lower reaction temperature than the existing method. Typically, Sm0.80Ce0.20S exhibits giant NTE with total volume change of 2.6% in the wide temperature range from 330 K to 100 K, the lowest covered here. This research opens a new paradigm of thermal-expansion control that will make electronic devices more resilient to temperature changes…read more. TECHNICAL ARTICLE