SHS Equipment for Powder Synthesis

The first installation for nitride powder production was a universal SHS equipment including three various hermetic reactors SHS-30 (301 capacity), SHS-20 (201 capacity), and SHS-8.0 (81 capacity). The SHS-30 reactor is equipped with an automated lock. The reactors can be equipped with the systems controlling the combustion rate and temperature, with personal computer (PC) supervising the parameter changes. They are made of corrosion-resistant refractory steel and can withstand up to 30 MPa. Within carbide or nitride production, this steel is neither carbonized nor nitrided. The temperature on the reactor walls does not exceed 300-500 °C. For laboratory experiments, a reactor of 2.51 (SHS-2.5) is mainly used. 

Development of the universal installation appeared to be an important stage in the development of the technology as it allowed us to synthesize a wide range of refractory compounds and demonstrate a high yield of the technology simultaneously. 

The SHS Filtration Combustion (FC) reactor was manufactured for obtaining nitrides under the mode of infiltration combustion. It is distinguished by the oriented gas flow [30], that is, forced infiltration of reactive or impurity gases. Such reactors are equipped with pressure gages and thermal couples, and have pressure-release valves. A grade-up example of the SHS FC reactor is an SHS 

For preliminary preparation of raw materials and final processing of the target products, conventional equipment of powder metallurgy (ball mills, attritors, grinders, and dry kilns) is used. It is desirable to apply up-to-date secondary machinery in order to maintain the technology efficiency and the synthesized product purity [65]. 

Synthesis of SHS-CeramIcs Based on Silicon and Aluminum Nitrides and SiAION Powders 

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