Tin Oxide Nano-particles By Gaseous Deflaggration(Detonation)Method And Phenetic Analysis

Nano tin oxide because of its unique nature, has been widely applied in many ways> due to preparation methods exist many drawbacks, so to find a better preparation method is extremely necessary. Gaseous detonation is a new method to synthesize nano materials by detonating gas mixture, which has the advantages of high purity, controlled particle size. This paper is mainly to research the method of nano tin dioxide synthesized by gaseous detonation, through the experimental summary of initial conditions on the influence of the law of generating nanoparticles. The main contents:1.Through the method of gaseous detonation, successfully prepared the pure rutile phase SnO2nanoparticles.2. With pressure testing and high-speed photography for experimental means, measured the two different initial pressure of detonation pressure and detonation velocity, and compared with the theoretical calculation3. Charactered the SnO2nanoparticles prepared by gaseous detonation which use hydrogen-oxygen gases mixture as the explosion source and the tin tetrachloride as the precursor. Experiments show that,when SnCL4:H2:02=1:2:1, the preparation of tin dioxide particle size, morphology are better. The particle size is about10nm, the grain is spherical and the distribution was uniformity, dispersion is good. With the initial temperature rises, the nano tin oxide particles have grown up trend. Along with the increase of concentration of precursor body,the particle size of tin dioxide particles become bigger,but agglomeration is more and more obvious. With the increase of oxygen content, the tin oxide particle morphology becomes irregular,and particle size larger, agglomeration is obvious.4.The crystal, morphology and particle size of tin oxide particles were characterized by means of a variety of materials analysis. In the case of overpressure, the prepared tin oxide particle size increases to more than lOOnm, the particles were spherical, crystal for rutile phase, crystal without defect.5. The similarity between the hypothetical stress curve and temperature curve temperature curve of the role of the Kruis model, by comparison with the experimental results, modified gas viscosity coefficient in the model were to predict the trend of the particles under different conditions.