HTM's cold wall furnaces are designed for work at highest temperatures in oxygen-free atmospheres. Depending on the material used for the heating conductor and the thermal insulation, different versions are available.
Due to the use of oxygen getters in the thermal insulation, extremely low oxygen gas atmospheres can be achieved. The usual working space volumes range from 0.5 l to 20 l.
Cold wall top loader furnace for work in oxygen-free and carbon-free atmosphere (Operation manual (German) Cold wall top loader furnace AU07-0-116) The furnace is very robust, with a large reserve capacity, and meets high safety standards. The heater and the thermal insulation consist only of high-pure alumina (C799) and molybdenum.
Tmax: 1850 °C;
Vessel: stainless steel, double-walled design, outside diameter 750 mm, height including the base feet 1100 mm, weight 750 kg;
Working space: Inside diameter of the heating basket 300 mm, height 350 mm;
Maximum weight of the material in the furnace chamber: 50 kg;
Maximum heating rate: 10 K/min;
Cooling rate near 1600 °C: 10 K/min;
Maximum heating power: 40 kVA;
2 thermocouples WRe in a ceramic protection tube;
Water cooling: flow rate 1 m3/h, maximum temperature 60 °C, pressureless outlet;
Control unit: control cabinet with separate transformer cabinet;
Connection: 3 x 400 V / 125 A;
Footprint: 16 m2.
The cold wall top loader furnace may be used for the following applications:
Sintering of oxygen-sensitive ceramics, such as AlN (aluminum nitride), Si3N4 (silicon nitride), BN (boron nitride), CeS (cerium sulfide);
Sintering of oxides, while simultaneously adjusting low oxidation states; for example MnO, TiOx, Ce2O3, UO2;
Realization of defined structures and properties in redox-stable oxides;
Thermal treatment and sintering of oxygen-sensitive metals, such as tungsten, molybdenum, tungsten-nickel-titanium alloys;
Production of metal/ceramic joints using the active metal solder technology;
Annealing of impurities, e.g. alkali / alkali oxides, from high temperature materials;
