Copper-Coated E‑Glass\nFiber-Based Strain Sensors\nfor High Temperatures

Flexible conducting ceramics offer\nexciting potential\nfor advanced\nhigh-temperature electronic and thermal management applications, but\nchallenges remain in achieving both flexibility and high electrical\nconductivity without compromising the material’s structural\nintegrity. In this study, we present a flexible metallized E-glass\nfiber network formed via mixing copper molecular ink with ceramic\nfibers (copper-coated aluminum borosilicate) to enable strain sensing\nunder harsh conditions, exhibiting a gauge factor of 1.34 and a response\ntime of 100 ms at room temperature. A silicon carbide preceramic precursor\nwas further coated to achieve a synergistic combination of high-temperature\noxidation resistance. The flexible sensor functions effectively at\ntemperatures of up to 400 °C, making it suitable for high-temperature\nenvironments, with a gauge factor of 0.181. Additionally, incorporating\na printed dipole antenna allows for a self-powered system that can\nwirelessly respond to real-time applied strains.