It’s not that complicated! The general heat pipe is filled with high-purity water! ! "The heat pipes used in PC radiators are normal-temperature heat pipes with mature technology. The working substance in the heat pipe is high-purity water. ..." The "high-temperature heat pipe" you mentioned containing low-temperature alloy metal powder is basically impossible to use in a computer. Used... It seems that you are not a student of materials or chemistry, so I will show my shame and say a few more words: metal powder thermal conductive heat pipe, the powder requirement is 1. Low melting point (it must be solid at room temperature, otherwise we will just use mercury) 4. It also needs to be easy to liquefy and vaporize, that is, the heat of vaporization is not too high. This is in line with the basic requirement of "evaporates when exposed to heat and condenses when exposed to cold". There are almost no pure metals that meet the above requirements! So it's usually an alloy. As for the material composition, I can tell you responsibly. It's a trade secret and I can't tell you. It seems you are the only one.