High-T gas-mixing furnace with in situ measurement of oxygen fugacity

The one bar gas-mixing furnace allows material studies and synthesis under fixed oxygen fugacity up to temperatures of 1500°C. The oxygen fugacity, which is controlled by mixing various C-O-H-(Ar) gases, is measured in situ by an oxygen-specific solid electrolyte. The equipment is particularly suited for studies of materials containing transition elements, redox phase equilibria, micro-scale transport and reaction processes, petrophysical measurements at fixed oxygen fugacity.

 

Furnace Type:

Horizontal Carbolite TZF 15/610 tube type

Vertical Gero Furnace Alsint tube type

 

Temperature:

Heating by siliciumcarbide elements. Maximum temperature 1500 °C

Horizontal furnace: temperature is controlled independently in three zones providing a long central zone of constant T

Vertical furnace: temperature is controlled by one thermo-couple; temperature is monitored at the sample, the O2-electrolyte and one further point

 

Gas flow:

Mixes of CO2-H2-(Ar) or CO-CO2(Ar) are used

Gas flow is regulated by digital Brooks mass flow controllers

 

Samples:

Samples are held in open containers of ceramics or noble metals

Horizontal: sample diameters of several cm and lengths up to 10 cm are possible

Vertical: sample diameters of ca. 1 cm are possible; rapid quenching in controlled gas atmosphere is possible

 

O2-electrolyte:

Yttrium-stabilized zirconia electrolyte (SIRO2) manufactured by

Ceramic Oxide Fabricators Pty. Ltd (Victoria, Australia)

Contact

Mr. Reiner Schulz
Chemistry and Physics of Earth Materials

Telegrafenberg
Building D, room 328
14473 Potsdam
tel. +49 331 288-1409