'syntactic' means 'putting together'. A composite material synthesized by putting a metal or polymer or a ceramic matrix with hollow spheres (microballoons). This composite material known as syntactic foam. It is used in the field where weight is a constrain as well as it is used for the purpose of energy absorption and for the purpose of heat resistant. Submarines, aircrafts where weight is constrained but also energy absorption capability of the material is a necessity factor. Microballoons have a drawback of lo…