Metal heat treatment vacuum furnaces are commonly used as experimental equipment in industries such as gemstones, batteries, activated carbon, silicates, gold, metallurgy, etc. Especially in the industry of processing gemstones, the usage is very large, so the technical indicators of metal heat treatment vacuum furnaces have strict requirements. Below we will introduce how gemstones are fired in a metal heat treatment vacuum furnace.

Firstly, the sealing of the metal heat treatment vacuum furnace is relatively strict. For example, during the process of firing gemstones, in order to achieve extremely transparent color, sintering must be completed under anaerobic conditions, which is a complex process. Secondly, during the firing process, repeated vacuuming is required because other gases are generated during the firing process, but gas protection is also necessary, usually through protective gases such as nitrogen, hydrogen, argon, etc. Extracting the transparency of gemstones requires a relatively long time due to continuous compression and insulation, usually lasting for two days. Therefore, in order to extract better color, it is necessary to equip a metal heat treatment vacuum furnace with excellent sealing properties. After high-temperature treatment of color and transparency, it can be polished and shaped! So a beautiful gemstone was born!