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《High Power Laser and Particle Beams》 2011-07
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Preparation of Ta_2O_5 aerogel with metal alkoxide method

Yang Jing,Ren Hongbo,Bi Yutie,Luo Xuan(Research Center of Laser Fusion,CAEP,P.O.Box 919-987,Mianyang 621900,China)  
With metal alkoxide as precursor,Ta2O5 aerogels were prepared by sol-gel technique.The sol-gel process is found to be affected by water amount,catalyst amount and concentration of Ta(OC2H5)5.The gelation can only happen in the presence of strong acid as catalyst,and with the increase of acid strength,the gelation time is obviously decreased.With the continuous increase of water,the gelation time lengthens and then tends to be constant.Additionally,the gelation time increases and the theoretical density of Ta2O5 aerogel decreases as the solvent amount increases.Through sol-gel process control along with supercritical drying technique,the Ta2O5 aerogel with a low density of 44 mg/cm3 was prepared.
【Fund】: 高温高密度等离子体国家重点实验室基金项目(9140C6806020609);; 国家高技术发展计划项目
【CateGory Index】: TQ427
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