The furnace system acts as the control, heating and monitoring unit of the Hesse Instruments heating microscope. It incorporates the EPA furnace control unit and a tube furnace with the corresponding furnace transformer. The furnace system forms an integral part of the EM301 heating microscope and can be used in modernisations of existing heating microscopes from Leitz/Leica.
The EPA furnace control unit acts as the interface between the furnace, the cooling system and the measuring station computer running the EMI III heating microscope software. As the robust control and monitoring unit of the heating microscope, it performs three basic functions:
The tube furnaces from Hesse Instruments have been designed specially for use in the heating microscope. Their design and advanced materials allow high heating rates, constant measuring conditions and easy operation.
All tube furnaces exhibit a constant temperature profile in the area of the specimen within the measuring cell. In combination with precise specimen positioning, the repeatability of measurements is better than that of larger furnaces and than that stipulated in the corresponding standards.
The heating elements of our furnaces are made of molybdenum disilicide (MoSi2), which is resistant to thermal shocks and corrosion. During operation, a protective layer of SiO2 forms on the surface, protecting against corrosion and thereby extending the service life of the heating element considerably. This allows very high heating rates of up to 80 K/min at maximum furnace temperatures of up to 1700°C.
The working tube of the tube furnaces is replaceable and can be changed easily without the need for tools when the measuring cell becomes contaminated.