Disadvantages of self-propagating high temperature synthesis method

The disadvantages of SHS are limited range of synthetic materials, difficult process control and compact products.

Self-propagating high temperature synthesis is a method to convert reactants into products by self-propagating combustion waves after ignition. The main advantages of this method are that the energy required for reaction synthesis is generated by itself (energy saving), the product purity is high (low boiling point impurities volatilize at high temperature), the reaction speed is fast, and the yield is high, so it is very attractive.

Brief introduction of self-propagating high temperature synthesis;

Self-propagating high temperature synthesis, also known as combustion synthesis technology, is a technology to synthesize materials by self-heating and self-conduction of high chemical reaction heat between reactants. Once the reactant is ignited, it will automatically diffuse to the unreacted area until the reaction is complete, which is a new method to prepare inorganic compound high temperature materials.

Self-propagating high temperature synthesis is mainly used to synthesize ceramics, intermetallic compounds and intermetallic compound-based composites. Atomic diffusion between solid phase and phase is usually completed at low temperature, and the growth tendency of reinforced phase is small, which is beneficial to obtain ultrafine reinforced phase, but the efficiency of this process is low. The composite process of this method includes sHS, xDTM, contact reaction, mixed salt reaction and mechanical alloying (MA).

Refer to the above? Baidu encyclopedia-self-propagating high temperature synthesis method