Preparation Of Nano-Sized Tin Oxide By Polymer-Network Method

SnO₂ has the widespread use in the industry , is the important electron, the ceramics and the chemical material. SnCl₄ is used as starting material, acryl amide and N,N'-methylenediacrylamide are used as monomer and lattice reagent, This article uses the polymer- network method prepares the SnO₂ nano-sized powder, with XRD. TEM, FT- IR and DTA-TG the method carries on the performance attribute, The results showed:Uses the polymer-network method may prepare particle size is smaller than the 50nm SnO₂ nano-sized powder, moreover the powder average grain diameter is small, the disperser is even, the specific surface area is bigger, reunites few. In the experimental process, monomer and lattice reagent allocated proportion as well as the agglutinates temperature is bigger influence to particle size.Through infrared analyzes determines agglutinates the temperature, the allocated proportion is 5 : 1 , the elevation of temperature the spectrogram basic other impurity peaks which to 500 ℃ nano-sized SnO₂ powder, the crystal water has been basic except that, explains agglutinates completely. When the temperature elevates, the particle crystal lattice changes slightly, the crystallization tends to completely, causes it the absorption peak intensity increase which corresponds with 666cm^-1. But the allocated proportion is 5 : 1, the elevation of temperature the spectrogram which to 400℃ nano-sized SnO₂ powder has one independent absorption peak in 1612cm^-1 place, this peak for free water H-O-H peak. This is because in agglutinates in the process has the part of crystal water bedding bag in the crystal lattice, has not been agglutinated. This also explained best agglutinated the temperature is 500℃.May know through the TEM analysis, When the monomer and the lattice reagent preparation allocated proportion is 4 : 1 or 6 : 1, makes the powder although the particle size is small, but the dispersivity is not good, has the reunion phenomenon occurrence. But the monomer and the lattice reagent preparation allocated proportion is 5:1 , the granule disperser is even, also the particle size is smaller, distributes narrowly, equally is 25-35nm, the SnO₂ specific surface area approximately is 28-38m²/g. Thus the monomer and the lattice reagent preparation best allocated proportion is 5 : 1.