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Vacuum Heat Treatment Furnace

Vacuum Sintering Furnace

Vacuum Brazing Furnace

Application of SPS Plasma Sintering Furnace

With fast sintering speed, good energy saving, and high efficiency, SPS plasma sintering furnace is one of the most advanced fast hot pressing furnace sintering systems in the world today. It is widely used in nanomaterials, functionally gradient materials, metal materials, magnetic materials, composite materials, and ceramics. And other materials.

1. Nano Materials

The old-fashioned hot pressing sintering, hot isostatic pressing and other methods to prepare nanomaterials are difficult to ensure the nanometer size of the crystal grains and meet the requirements of complete densification. The use of SPS process, because of its rapid heating and short synthesis time, can significantly inhibit the coarsening of crystal grains. Using the feature of rapid cooling of SPS to control the reaction history of the sintering process, avoid some unnecessary reactions, which may enable the defects and substructures in the powder to be retained in the sintered bulk material. In a sense, this is conducive to the synthesis of metastable materials, and is particularly conducive to the preparation of nanomaterials.

2. Functionally Gradient Materials

Functionally gradient material (FGM) is a composite material with a gradient distribution in a certain direction. The sintering temperature of each layer is different, and it is difficult to sinter it at one time using the old-fashioned sintering method. The use of CVD, PVD and other methods to prepare gradient materials is costly, and it is difficult to achieve industrial production. This difficulty can be overcome well by the SPS process.

3. Electromagnetic Materials

The SPS process can also be used to produce thermoelectric conversion elements of SiGe, PbTe, BiTe, FeSi, CoSb3 and other systems, as well as various functional materials widely used in the electronic field, such as superconducting materials, magnetic materials, targets, dielectric materials, and storage materials. Hydrogen materials, shape memory materials, solid battery materials, optical materials, etc.

4. Intermetallic Compounds

Intermetallic compounds have brittleness and high melting point at room temperature, so their preparation or production requires special processes. The use of melting methods (electric spark melting, resistance melting, induction melting, etc.) to prepare intermetallic compounds often requires high energy, vacuum systems, and requires secondary processing (forging). The SPS process is used to prepare intermetallic compounds. Because of the effective use of self-heating and surface activation between particles, low temperature and rapid sintering can be achieved, so SPS process is an effective method for preparing intermetallic compounds.

5. High-density, Fine-grained Ceramics and Cermets

In the SPS process, each powder particle in the sample and the space between each other may itself be a heat source. The heat transfer process necessary for sintering with the usual method can be ignored in the SPS process. Therefore, the sintering time can be greatly shortened, and the sintering temperature is also significantly reduced. For the preparation of high-density, fine-grained ceramics, SPS is a very advantageous sintering method.