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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Synthesis, characterization and sintering of nanocrystalline titania powders produced by chemical vapour synthesis
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Synthesis, characterization and sintering of nanocrystalline titania powders produced by chemical vapour synthesis

机译：化学气相合成法制备纳米晶二氧化钛粉体的合成，表征和烧结

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摘要

The chemical vapour synthesis (CVS) route is a versatile process that can be used for the synthesis of nanocrystalline ceramics with very small crystallite sizes having a narrow particle size distribution. In this study, a CVS technique was used to prepare nanocrystalline titania from tetraisopropyl orthotitanate at a processing temperature of 1273 K (1000 degrees C). High resolution transmission electron microscopy, x-ray diffraction and nitrogen adsorption techniques were used for the characterization of the as-synthesized powders. Green bodies were produced by a combination of uniaxial and cold isostatic pressing, which were then sintered. A simple pressureless sintering route was established that led to the production of a dense titania ceramic with a uniform microstructure and an average grain size well in the nanophase regime.
机译：化学气相合成（CVS）路线是一种通用的方法，可用于合成具有非常窄的晶粒尺寸分布，具有非常小的晶粒尺寸的纳米晶体陶瓷。在这项研究中，使用CVS技术以原钛酸四异丙酯在1273 K（1000摄氏度）的加工温度下制备纳米晶二氧化钛。高分辨率透射电子显微镜，X射线衍射和氮吸附技术用于表征合成后的粉末。通过单轴和冷等静压的组合生产生坯，然后将其烧结。建立了一种简单的无压烧结路线，该路线导致了在纳米相状态下具有均匀的微观结构和平均晶粒尺寸的致密二氧化钛陶瓷的生产。

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