SANS of ZrO2·SiO2 gels
作者： F.M.A Margaça , I.M Miranda Salvado , J Teixeira
DOI: 10.1016/S0022-3093(96)00550-9
关键词:
摘要: Abstract Small angle neutron scattering (SANS) measurements have been performed to investigate the nanoscale structure of materials system xZrO2·SiO2 with x≤10 mol%, at different processing stages. The were prepared by sol–gel using alkoxides method, in strong acidic conditions. Samples studied as xerogels heat-treated 120° C and 850° C; wet gels gel point; after 4 h aging 60° C. samples showed extended linear chains ca. 10 nm long point. aged has a mass fractal dimension 1.8. 120°C xerogel shows homogeneous oxide regions 16 average diameter nature. For 850°C reduced about 13 presented sharp smooth surface, obeying Porod law.
elsevier.com
sci-hub.se 参考文章(11)
I. M. Miranda Salvado, F. M. A. Marga�a, J. Teixeira, SANS study of the aging of x TiO 2 -SiO 2 gels Journal of Sol-Gel Science and Technology. ,vol. 2, pp. 289- 294 ,(1994) , 10.1007/BF00486258
Glatter O, Kratky O, Pilz I, Small Angle X-Ray Scattering ,(1982)
I.M. Miranda Salvado, C.J. Serna, J.M. Fernandez Navarro, ZrO2-SiO2 materials prepared by sol-gel Journal of Non-crystalline Solids. ,vol. 100, pp. 330- 338 ,(1988) , 10.1016/0022-3093(88)90042-7
I.M. Miranda Salvado, J.M. Fernandez Navarro, TiO2SiO2 glasses prepared by the alkoxide route Journal of Non-crystalline Solids. pp. 256- 261 ,(1992) , 10.1016/S0022-3093(05)80626-X
J. Teixeira, Small‐angle scattering by fractal systems Journal of Applied Crystallography. ,vol. 21, pp. 781- 785 ,(1988) , 10.1107/S0021889888000263
B. Himmel, Th. Gerber, H. Bürger, X-ray diffraction investigations of silica gel structures Journal of Non-crystalline Solids. ,vol. 91, pp. 122- 136 ,(1987) , 10.1016/S0022-3093(87)80089-3
A. Dauger, A. Lecomte, H. Vesteghem, R. Guinebretiere, D. Fargeot, Small‐angle X‐ray scattering study of cordierite sol–gel synthesis Journal of Applied Crystallography. ,vol. 24, pp. 765- 770 ,(1991) , 10.1107/S0021889891001103
Larry L. Hench, Jon K. West, The sol-gel process Chemical Reviews. ,vol. 90, pp. 33- 72 ,(1990) , 10.1021/CR00099A003
I.M. Miranda Salvado, F.M.A. Margaça, J. Teixeira, A SANS study of xTiO2SiO2 gels with low titania content Journal of Non-crystalline Solids. ,vol. 163, pp. 115- 124 ,(1993) , 10.1016/0022-3093(93)90760-U
P. W. J. G. Wijnen, T. P. M. Beelen, K. P. J. Rummens, H. C. P. L. Saeijs, R. A. van Santen, Silica gel from water glass: a SAXS study of the formation and ageing of fractal aggregates Journal of Applied Crystallography. ,vol. 24, pp. 759- 764 ,(1991) , 10.1107/S0021889891000924