... make out phosphor gas, electrical furnace core pipe, gas combustion radiation form, thermocouple-protection tube etc.3.Electricity Field:Normally used ... in high-pressure and high-frequency insulation pipe, waveguide tube etc.4.New Light Source Field:Quartz is a great ... such as the growth of germanium, the silicon crucible, boat furnace core pipe, Bell jar etc. Some Typical Characteristics of Quartz ...