Teflon coating has excellent heat and low temperature resistance. It can resist high temperature to 300℃ in a short time, and generally can be used continuously between 240-260℃. It has obvious thermal stability and can work at freezing temperature without embrittlement and melting at high temperature. You can refer to this website, which may be helpful to you, but you may not find the answer to this technical question here. You'd better ask a professional teacher or an insider.