Fabrication and process analysis of anatase type TiO₂ nanofluid by an arc spray nanofluid synthesis system

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• 作者：Ho Chang ; Min-Kun Liu
• 关键词：A1. Nanostructures ; A2. Growth from vapor ; B1. Nanomaterials ; B1. Oxides
• 刊名：Journal of Crystal Growth
• 出版年：2007
• 出版时间：1 June 2007
• 年：2007
• 卷：304
• 期：1
• 页码：244-252
• 全文大小：880 K

文摘

This research aims to analyze the process parameters of an innovative method for preparing TiO₂ nanofluids. In the arc spray nanofluid synthesis system (ASNSS), a titanium rod, deployed as an electrode in electrical discharge machining (EDM), is melted by the submerged arc and vaporized in deionized liquid under a controlled vacuum environment. The vaporized Ti particles are then rapidly quenched by the designed cooling system, thus forming nanocrystalline powders. The experimental results and analysis revealed that the critical electric current for preparing the nanofluid is 1.63 A. Parameters such as applied electric power (including current, voltage and pulse-duration) and temperature of deionized liquid are found to influence the characteristics of the generated nanoparticles. With a set of designed process parameters, the developed ASNSS can generate the TiO₂ nanofluid with an average particle diameter less than 20 nm and with an improved size distribution and high roundness.