Microwave Chemical Co-precipitation Prepared By Zao Nanopowder

ZnO film is a direct compound semiconductor with wide band gap energy of 3.37eV and a exciton binding energy 60meV at room temperature. It is of great interest in photonic,optical,chemical,and electrical application,which enable they are widely used as dope,rubber,photocatalyst and so on.ZAO(Zinc Aluminum Oxide) thin film is used widely and effectively in the fields of surface acoustic wave devices,solar cell,gas sensors,varistors and so on because of its excellent piezoelectrical performance.It also has the tremendous potential applications for ultraviolet detectors,LED,LD.In this paper,the ZAO nanometer powers were prepared with ZnSO4·7H2O and Al2(SO4)3·18H2O as raw materials by Microwave Co-precipitation Method.The influence factors on average diameter of ZAO powers,such as pH, reaction time,reaction temperature,Zn2+concentration and so on.It was characterized by TG-DSC,XRD, UV,FT-IR,TEM. Under the optimal condition of pH value of 9,reacting temperature of 40℃, reacting time is 20-30mins and Zn2+concentration is lmol/L,the ZAO powders with cublic structure, well distribution, finer dispersing in matrix.Under the best condition,the size well-distributed powder was prepared with the average grain size of 20nm and specific area is 67.6m2/g.In this paper, optical and electronic properties of ZnO doped by Al were studied based on DFT theory. For the exchange-correction energy, we employed GGA in the form of PW91 and ultra-soft pseudo potential (USPP).The elements doped by replacement and inside of ZnO were calculated. The lattice and optical properties of these structures are calculated and compared with the experiments and previous theoretical works. By analyzing the results, the z axis was constricted after geometry optimization. By-doping, the conductivities for both of the models were increased and the ratio of Al and ZriO atom was an important effect for the ability of conductivity. The calculated optical properties of absorption coefficient presented a peak in ultraviolet range and this was according with the experiment. The Im (epsilon) of dielectric function was unequal to zero, and the results of replacement model were agreement to the experiment. In the word,a saving-energy high efficient comprehensive environmental-friendly new style process of preparation of ultra-fine power has been developed.Therefore,the research of this experiment was innovative scientifically as well as the research of this experiment was of importance in the practical research of this experiment was of importance in the practical research value of application.In particular,this method of research was of significance in research in developing zinc product with high value for our country being rich in resource of zinc.