Investigating the structural and physical properties for al-7000 series prepared on different temperatures and pressures

Thermoelectricity is referred to convert from waste heat generated from many sources such as radiation, automobile exhaust gases to electricity. Via conversion of waste heat to electricity by TEP(Thermoelectric Power) of solids without generating greenhouse gas emissions , thermoelectric generators could be significant role and also TE coolers are used to make refrigerators and other cooling systems. The main aim of this study is to investigate the structural and thermoelectric properties of Alumix 431 (Al-5.5Zn-2.5Mg-1.5Cu) material which is the Al7xxx series alloy and prepared utilizing the traditional press and sintering process in various pressure and temperatures. Due to the goal, the structural properties of materials were investigated on the optical, SEM figures and hardness testing measurement results; the thermoelectric properties were measured on the PPMS (Physical Property Measurement System) Machine at temperature range 5-300K. The obtained experimental results show that at temperature range of 285-295 K, the maximum electrical resistivity and electrical conductivity were acquired 0.161Ωm and 24.96W/Km respectively, and the Seebeck Coefficient values changed mostly negative sign to positive sign due to dominate from carriers. Also, it was determined as 5.65×10-6 of the maximum figure of merit at 300K temperature.