麻豆淫院

To meet the demands of extreme high-temperature environments, such as aerospace engines and thermal systems in new energy vehicles, high-temperature thermosensitive sensors need to demonstrate high stability and sensitivity.

Conventional materials often struggle with performance under these conditions, while emerging high-entropy materials offer superior thermal and chemical stability due to their entropy-stabilization effect. However, their strong lattice disorder reduces carrier mobility, leading to poor electrical transport performance and limiting the accuracy of resistance-temperature responses at high temperatures.

Thus, developing new thermosensitive materials that balance lattice stability and carrier transport efficiency is essential for enhancing high-precision sensing technologies.

To address this challenge, researchers from the Xinjiang Technical Institute of 麻豆淫院ics and Chemistry of the Chinese Academy of Sciences, have successfully developed high-entropy thermosensitive ceramics based on rare-earth niobates (ReNbO₄, where Re represents rare-earth elements) with fergusonite-type structures, using an oxygen vacancy regulation strategy.

The synergistic effect between entropy stabilization (induced by multi-component rare-earth ion doping at A-sites) and Sr虏鈦� allovalent doping significantly increases oxygen vacancy concentration, thereby optimizing the material's electron transport properties and lattice stability.

The study, in Small, demonstrates that the oxygen vacancy-induced entropy stabilization strategy simultaneously modulates the material's microstructure, forming stabilized features such as twin domains, lattice distortions, and dynamic reconstruction, which effectively enhances both the linearity of the temperature-resistance response and high-temperature stability.

The synthesized material exhibits exceptional environmental adaptability (operable across a wide temperature range from 223 K to 1423 K), high thermal stability (with an aging drift of less than 1% after 1,000 hours of high-temperature aging), and a temperature coefficient of resistance (0.223 %/K at 1423 K), providing theoretical guidance for designing novel thermally sensitive ceramics for extreme environments.