Printing highly sensitive strain gauges with polymer-derived ceramics and In2O3 composites for high-temperature applications

Abstract

The development of high-temperature thick film strain gauges (TFSGs) that offer both durability and a high gauge factor (GF) remains a formidable challenge. This study integrates polymer-derived ceramic technology with filler techniques to introduce the SiCNO/In₂O₃ TFSG. The proposed TFSG demonstrates a stable strain response and exceptional thermal stability, enabling its application at temperatures up to 1100 °C. Notably, the SiCNO/In₂O₃ TFSG exhibits minimal resistance drift of 0.31 %/h at 1100 °C, and an impressive GF of 10.94 at 1000 °C. These advancements underscore its significant potential for applications requiring precise strain monitoring under harsh thermal conditions, such as propulsion systems and industrial processes.