Study Of The Electrical Conductivity Of Multi-Gallium Based Liquid Metals

Gallium-based liquid metals offer numerous advantages and significant applications due to their high electrical and thermal conductivity as metals and their excellent liquid-like fluidity.However,due to the uniqueness of the gallium element and the wide range of applications of gallium-based alloys,their microstructure is still not well known and some of the rich physical properties of gallium-based liquid metals,such as electrical conductivity,melting point and viscosity,still deserve to be investigated in depth.Currently,More research has been carried out on the thermal properties of low-component alloys such as Ga In and Galinstan,and more mature liquid metal products are also focused on low-component alloys,with less research reported on ternary and above multi-component alloys.Therefore,in order to solve the above problems,this study aims to investigate the electrical conductivity of multifaceted liquid alloys and to analyse the effects of different elements on the physical properties such as electrical conductivity and melting point of gallium-based alloys in order to develop multifaceted alloy systems with excellent overall performance.The main research elements include:Constructing an experimental platform suitable for testing the conductivity of gallium-based liquid metals and analysing the effects of different pretreatment methods and different shapes of conductivity cells on the conductivity determination results in order to establish effective standards.Subsequently,the Ga_74.88In_13.97Sn_8.15Zn₃ quaternary eutectic master with better overall performance was selected by comparing parameters such as conductivity performance and melting information of Ga-In-Sn-Zn quaternary alloys.The trends of the conductivity parameters of the binary gallium-based alloys after the doping of eutectic and non-eutectic elements with gallium were investigated,as well as the relationships between the conductivity properties and the temperature and composition ratios,and the intrinsic relationship between the alloy conductivity and liquid structure parameters（such as structure factor and atomic coordination number）were analysed.At the same time,the coordination properties of different elements with the main element gallium were analysed with the aid of information such as DSC heat flow curves,providing a reference basis for the introduction of elemental ratios in subsequent multi-alloy systems.Based on Ga_74.88In_13.97Sn_8.15Zn₃ quaternary eutectic matrix,different elements were introduced to form a gallium-based multi alloy system,and the electrical conductivity and melting behaviour of the system were investigated.Finally,through the element introduction method of equal proportional multi-element micro-addition,a multi alloy system such as Ga_74.88In_13.97Sn_8.15Zn₃+1%Mg₅₀Cd₅₀ with a melting point below 6.5°C and conductivity above 3.65×10⁶S/m（300K）with good overall performance was developed.