Microemulsion Systems Of Nano-nickel Based Alloys And Compounds, Synthesis And Performance Research

Some studies indicate that as a surfactant in microemulsion, it is not necessary for AOT to be cosurfactant. However, the properties and the influence of the fraction of water in the new W/O microemulsion system which was prepared by Aerosol OT (AOT), n-butanol, n-heptane and water were studied at room temperature. At the same time, the phase diagrams were established for this system at room temperature. The new microemulsion region of the quaternary system was bigger than the microemulsion region ternary of AOT/n-heptane/water; furthermore the new microemulsion region of the quaternary system was divided into two parts when the fraction of water attained a value. The structure change of W/Oâ†'bi-continuous structureâ†'virgulate liquid crystalsâ†'lamellar liquid crystalsâ†'bi-continuous structureâ†'O/W was studied by conductance measurement. The structure parameters were caculated, and then the results provide an important foundation for further studies about the new microemulsion. These results will direct the following work in the new microemulsion.The precursors of Fe-Ni alloy and Ni-Co alloy were prepared by reduction of FeSO₄,NiCl₂ and NiCl₂,Co(NO₃)₂ with potassium borohydride in the microemulsion of AOT/n-butanol/n-heptane/water at 80±0.5°C,75±0.5°C , respectively. The precursors were heat-treated under different temperature; the results indicated the fabrication of the single alloy depends on the heat-treated temperature. The two phase-single alloys were formed at 400°C and 450°C. At the same time the susceptiveness and the electrochemical property of the two phase-single alloys and the samples under different heat-treated temperature were investigated.The precursor of Fe-Ni-Cu composite was prepared by reduction of FeSO₄,NiCl₂ and CuSO₄ with potassium borohydride in the microemulsion of AOT/n-butanol/n-heptane/water at 70±0.5°C. The precursor particles were heat-treated under different temperature, and then formed a series of different composites in composition and phase. At one time the susceptiveness and the electrochemical property of the series composites were investigated.