热分析图 不知道怎么分析 请教大家！！

应助达人

纯镍的话，是有点怪异，样品以前做有这情况吗？
From Wikipedia, the free encyclopedia:
Nickel is a silvery-white metal with a slight golden tinge that takes a high polish. It is one of only four elements that are magnetic at or near room temperature. Its Curie temperature is 355 °C.
Melting point 1728 K, 1455 °C, 2651 °F
Boiling point 3186 K, 2913 °C, 5275 °F