Vacuum hot pressing furnace is widely used in hard alloy, functional ceramics, powder metallurgy, etc. under high temperature and high vacuum conditions, and can be hot pressed and sintered under the condition of aeration protection.
Hot pressing has a limited field of application for such materials which do not sinter to high densities due to low diffusion coefficients or for cases where a pore-free state is required (for optimum mechanical, thermal or optical properties).
With this process only parts with simple shapes like plates, blocks, cylinders can be manufactured easily. With a highly sophisticated design of pressing dies also more complex shapes can be produced.
Available pressing force: 50kN to 9000kN at max. 2500°C, applicable for components of max. ? 700mm.
Application of hot pressing in the field of ceramics include:
1.Silicon nitride, mixed ceramics of Al2O3, TiC/TiN and sialon for cutting tools, components of heavy-duty valves, bearings, wear parts for process technology.
2.PLZT (lead-lanthan-zircon-titanate) and other high developed functional ceramic (O2atmosphere)
3.Boron carbide (B4C) for extremely wear resistant parts and armors.
4.SiC whisker reinforced Al2O3 for cutting tools
5.MMC and CMC materials, composite materials
6.Sputter targets
The furnace body is a vertical furnace shell, the inner layer of which is a cylinder made of stainless steel, and the outer layer is carbon steel. The furnace body is divided into two parts, one third of which is the furnace cover, which can be fully opened sideways manually, and two-thirds of which are fixed furnace bodies. The design is unique and easy to operate. A jacket is formed between the two layers to remove the heat transferred to the furnace shell by the cooling water, so that the temperature of the furnace wall does not exceed 60 ° C, and the upper and lower flanges are welded as a whole. In the middle, there are infrared temperature measuring holes (protective atmosphere vents), thermocouple temperature measuring holes, air venting holes and observation holes, platinum-iridium thermocouples have a temperature-automatic exit device, and infrared temperature observation holes have glass-air blowing anti-fog devices. The observation hole used by the operator is provided with a baffle.

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