What is the highest temperature for a quartz tube furnace?

The maximum temperature of a quartz tube furnace can usually reach 1200 ℃, which is its ultimate temperature resistance value under atmospheric conditions. In a vacuum environment, due to increased risks of deformation and failure, its temperature resistance limit will drop to 1000 ℃. The following is a detailed analysis of its temperature resistance performance:

Temperature resistance under atmospheric conditions:
Quartz tubes can withstand temperatures up to 1200 ℃ under atmospheric conditions.
This characteristic makes quartz tube furnaces suitable for applications that require temperatures up to 1200 ℃, such as semiconductor processing, material synthesis, and heat treatment.

Temperature resistance under vacuum conditions:
Under vacuum conditions, the temperature resistance limit of quartz tubes drops to 1000 ℃.
This is because in a vacuum environment, quartz tubes are more prone to deformation and failure.

Continuous operating temperature:
The continuous working temperature of a quartz tube furnace is usually 1100 ℃.
This means that during long-term operation, the furnace temperature should be kept below 1100 ℃ to ensure the stability and lifespan of the quartz tube.

Short term usage temperature:
Quartz tubes can withstand higher temperatures in a short period of time, such as 1450 ℃ (but it should be noted that this is not a long-term operating temperature).
However, in practical applications, frequent exposure of quartz tubes to extreme high temperatures should be avoided to reduce the risk of cracking caused by thermal stress.

Other features:
Quartz tubes have a very small coefficient of thermal expansion and can withstand drastic temperature changes.
For example, heating quartz glass to around 1100 ℃ and placing it in room temperature water will not cause it to explode.
Quartz tubes also have good chemical stability, and apart from HF, they hardly react chemically with other acidic substances.