Pore-forming agent´s influence on properties of Al-Fe sound-absorbing materials synthesized by self-propagation high-temperature synthesizing (SHS)

In this article, we will discuss the influence of NaCl and anhydrous K2CO3 Pore-forming agent on the porosity properties of Al-Fe absorption materials synthesized by SHS; The research results show that: (1)Under the conditions of the same frequency, with the NaCl and anhydrous K2CO3 volume content increased, the specimen porosity gradually increases, and the absorption coefficient increased linearly; (2) under the same experiment conditions, using NaCl as Pore-forming agent for Al-Fe absorption materials synthesized by SHS, its sound absorption properties is significantly higher than that using anhydrous K2CO3 as the Pore-forming agent.