“…The temperature-sensitive layer is mainly made of metals [11,12,14,16,18], metal compounds [2,[13][14][15] and nonmetallic compounds [17], and the flexible substrate of Polydimethylsiloxane (PDMS) [18], polyimide [2,[12][13][14][15] and other polymer materials [16,17]. However, not only the [2,12,13,15,16,18]. flexible thermocouple temperature sensor, but the other kinds of flexible temperature sensor also do not have the ability to detect high-temperature, because flexible substrates are mainly polymers with low melting points (generally lower than 400 • C), which become brittle after high-temperature carbonization [19].…”