VOLTA FURNACE > Products > Tube Furnaces > Gradient Tube Furnaces
two or three zone Tube FURNACE
- Max temp: 1200, 1400, 1700 °C
- Heated length(s): 600, 900, 1200 mm
- Furnace Ø: 40 – 150 mm
- Number of heated zones: 2, 3, more
- Orientation: horizontal / vertical
CVD Tube FURNACE
- Max temp: 1200 °C
- Heated length(s): 300 mm
- Furnace Ø: 25 – 150 mm
- Orientation: horizontal
pecvd Tube FURNACE
- Max temp: 1200 °C
- Heated length(s): 300,440 mm
- Furnace Ø: 25 – 150 mm
- Orientation: horizontal
GRADIENT TUBE FURNACES – FAQ
WHAT EXACTLY IS A GRADIENT TUBE FURNACE?
It is a kind of split tube furnace featuring multiple heated zones and equipped with zone barriers. These barriers are essentially pieces of insulation that fit between each heating element module to minimize heat transfer between heated zones.
HOW DO YOU CONTROL THE GRADIENTS IN A GRADIENT TUBE FURNACE?
Each heated zone has its own independent temperature controller. This allows setting different temperatures in each zone. The zone barriers help lessen the heat transfer between zones, enhancing overall control and making it possible for the operator to create a temperature gradient along the heated length, like 500°C in zone 1, 450°C in zone 2, and 400°C in zone 3.
WHEN WOULD YOU NEED A GRADIENT TUBE FURNACE?
There are various applications for it. One example is chemical vapour deposition (CVD). In this process, a substance is vaporised in the hottest zone, transported along a work tube via a carrier gas, and then condensed on a substrate in the coolest zone. Gradient tube furnaces are perfect for this, as each end of the furnace can operate at different temperatures, allowing a temperature gradient between them.