Hydrothermal Synthesis And Characterization Of Tin And Antimony-doped Indium Oxide IATO

Abstract:Transparent insulation materials can let the light through selectively,ensure transparency by letting visible light through and ensure insulation effect by barrier infrared light.So it can be used on window glass,which attracted widespread attention.Tin-doped indium oxide ITO is an ideal transparent insulation material,which has been widely used.Indium in ITO is a kind of expensive rare metal,so the study on how to improve the performance of ITO in order to get better use of the valuable Indium resources is very worthy of study.ATO is also a kind of good transparent insulation materials,if the advantages of both can be integrated,it would became a better transparent insulation material.ATO is antimony-doped tin oxide,this paper studied the preparation of tin and antimony doped indium oxide.A simple hydrothermal-calcination method,which use water as a solvent and urea as the precipitating agent,is choosed.Using XRD,FTIR,TG-DSC,SEM,TEM and Spectrophotometer,the effects of hydrothermal reaction temperature,hydrothermal reaction time,the amount of urea,cation concentration and calcination temperature on phase,microstructure and optical properties of the product in the process of doped cubic indium oxide preparation is studied. The reaction temperature is found to be the main factor,pure indium hydroxide cubic phase can be generated at160℃.The less amount of urea, the smaller grain size.The effect of cation concentration are not significant.Adding appropriate amount of PVP during the reaction can inhibit the growth of the particles,which guarantees the preparation of neat morphology cubic indium hydroxide with narrow particle size distribution.Indium oxide phase with the original appearance can be obtained by calcinating the indium hydroxide.Eventually come optimum conditions:Cation concentration of0.14mol/L, the reaction amount part of urea to be15times of the theoretical amount, adding appropriate amount of PVP, hydrothermal reaction in160℃for18hours to obtain a precursor, calcining the precursor in600℃to obtain oxide.The infrared absorption band and the optical bandgap change when antimony is doped into ITO. The feasibility of controling the reaction to produce corundum structure InOOH and cubic structure In(OH)3by adjusting the type and amount of adding acid is also studied.By study the situation of nitric acid, acetic acid, citric acid and tartaric acid,it is found that adding a large amount of citric acid can completely make the reaction to generate InOOH,while it only takes a small amount of tartaric acid to achieve this goal. So it is able to control the hydrothermal products by adding tartaric acid or not.The InOOH obtained can transform into corundum structure indium oxide by calcining in600℃.