抄録
Two methods of heat insulation in High Temperature Vacuum Furnace is discussed. One is metal reflector system and another is powder insulation method. In some cases, they are used in single and or in complex method according to the purpose.
On application of heat insulation for large vacuum furnace of industrial scale, it is very important to select the best suitable materials to economize the operation costs.
It is advisable to use the metal reflector in tempereture below 1500°C. However, over the temperature 2000°C the powder insulation method is more effective and economical.
Experiment have been carried out on sevral industrial vaccuum furnace regarding the properties of the graphite as an insulator in high temperature, artificial graphite for electrodes, as well as the heat shield effect of metal reflector.
