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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 >Homogeneous Si-Ti and Si-Ti-Zr polymeric systems obtained from monomeric precursors
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Homogeneous Si-Ti and Si-Ti-Zr polymeric systems obtained from monomeric precursors

机译：由单体前体获得的均相Si-Ti和Si-Ti-Zr聚合物体系

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摘要

A new chemical strategy for the preparation of a homogeneous Si-Ti-Zr sol was developed. The procedure is based on strategies developed for the Si-Ti and Si-Zr. Sols were characterized by Fourier transform infrared spectroscopy (FTIR). Assignments of the simultaneous formation of the Si-O-Ti and Si-O-Zr bonds were made. The xerogels and oxides were also analyzed by Si-29 CP MAS NMR, X-ray diffraction (XRD), transmission electron microscopy (TEM) and electron paramagnetic resonance. Zr inhibits condensation of the siloxane species in the xerogels. All the solid samples, including those calcined at 900 degrees C were amorphous. EPR results indicate that the Ti(III) symmetry is octahedrally distorted. (C) 1997 Elsevier Science B.V.
机译：开发了制备均相Si-Ti-Zr溶胶的新化学策略。该程序基于为Si-Ti和Si-Zr开发的策略。溶胶通过傅里叶变换红外光谱（FTIR）进行表征。指定了同时形成Si-O-Ti和Si-O-Zr键的方法。还通过Si-29 CP MAS NMR，X射线衍射（XRD），透射电子显微镜（TEM）和电子顺磁共振分析了干凝胶和氧化物。 Zr抑制干凝胶中硅氧烷物质的缩合。包括在900摄氏度下煅烧的所有固体样品都是无定形的。 EPR结果表明Ti（III）的对称性是八面体变形的。 （C）1997年Elsevier Science B.V.

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