Feedback Furnace for flux crystal growth

Feedbach Furnace for flux crystal growth

A high-precision measurement system directly detects ongoing crystallization during flux growth by the onset of characteristic signatures in the temperature profile of the sample. This signal is caused by the latent heat associated with the phase transition. The in-situ detection of nucleation allows to significantly reduce the relevant temperature regime and enhances the applicability of lower cooling rates than previously practical. The feedback furnace combines crystal growth with a thermal analysis of the sample material to provide a powerful instrument for the creation of heretofore poorly studied multicomponent compounds.

To run the furnace, a standard computer screen, a mouse and a keyboard are needed. A vacuum pump can be connected to the flange at the right side of the furnace. Inert gases are let in through a screwed hose connection on the right side if the casting.


 

Technical details

  • Max. temperature: 1300 °C
  • Max. crucible dimensions: d = 25 mm, h = 50 mm
  • Precise sample temperature monitoring by lock-in amplified resistivity measurements AND thermocouples
  • Automatic detection of temperature anomalies down to 10-4 abs(T)
  • Fully computer-controlled and automatable via GUI or python scripts
  • Vacuum and gas connections
  • Comfortable crucible installation due to a vertically movable furnace hood

 

 

Feedback Furnace Open