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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >SAXS investigation of morphology changes in lead-titanate aerogels
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SAXS investigation of morphology changes in lead-titanate aerogels

机译：SAXS研究钛酸铅气凝胶的形态变化

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摘要

Highly porous lead-titanate (PT) aerogels were prepared by sol-gel-processing and drying under supercritical conditions in isopropanol. After annealing in air for one hour at seven temperatures from 110 to 600 degrees C samples were ground for SAXS-measurements. Different models were used to fit the scattering data. Nanosized structures in the PT-aerogel backbone vanish upon thermal treatment around 250 degrees C. The specific surface area decreases monotonically with annealing temperature. SAXS-data are compared to recent N-2-sorption measurements. The main finding of our investigations was that the crystallization of small amorphous spheres into big angular particles can be studied using a concept called angulosity. (C) 1998 Elsevier Science B.V. All rights reserved. [References: 7]
机译：通过溶胶-凝胶处理并在异丙醇中在超临界条件下干燥，制备高度多孔的钛酸铅（PT）气凝胶。在空气中在110至600摄氏度的七个温度下退火一小时后，将样品研磨以进行SAXS测量。使用了不同的模型来拟合散射数据。 PT-气凝胶主链中的纳米结构在250摄氏度左右的热处理后消失。比表面积随退火温度单调降低。将SAXS数据与最近的N-2-吸附测量值进行比较。我们研究的主要发现是，可以使用称为“无角性”的概念来研究将小的无定形小球结晶成大角度的颗粒。 （C）1998 Elsevier Science B.V.保留所有权利。 [参考：7]

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