English
Laboratory tube furnaces are often used as external heaters and are known as "hot-wall heaters", a classic design.Depending on the operating temperature, the tubes are usually made of transparent quartz tubes, high-purity alumina ceramic tubes, and high-strength metal alloy tubes. In order to meet different thermal research requirements, tube furnaces can be designed with multiple heating zones for flexible control of the temperature gradient in the working chamber; the tubes can be operated in controlled atmospheres or in a high vacuum to suit different operating requirements.
