An Overview on Research Activities in Transparent Ceramics, Nanocomposites and Nanosized Oxides
讲座名称：
An Overview on Research Activities in Transparent Ceramics, Nanocomposites and Nanosized Oxides
讲座时间：
2014-06-27
讲座人：
Kong Ling Bing
形式：
校区：
兴庆校区
实践学分：
讲座内容：
报告题目：An Overview on Research Activities in Transparent Ceramics, Nanocomposites and Nanosized Oxides
报 告 人：Kong Ling Bing 新加坡南洋理工大学
报告时间：2014年6月27日(星期五) 上午10:00-11:00
报告地点：曲江校区西六楼409会议室
报告摘要：
Transparent ceramics have important applications as solid-state lasers in various fields. Processing of transparent ceramics with high transmittance requires special carefulness. Our recent results on relationships between processing and optical properties of selected transparent ceramics, including slurry concentration, sintering temperature, heating rate and sintering aid concentration, will be presented and discussed.
Renewable energy has become a hot research topic all around world. One important aspect is the storage of renewable energy with high efficiency. Flexible energy storage devices have attracted special attention recently. The performances of such devices are heavily dependent on the properties of flexible conductive electrodes. Most conductive electrodes are nanocomposites with nanocarbon materials as conductive components, such as carbon nanotubes (CNTs), carbon nanofibers (CNFs), and grapheme. High quality suspension is a key to fabrication of nanocarbon based nanocomposites. Different from those widely reported in the open literature, Chinese ink has been used as dispersant to produce suspensions of CNTs and CNFs, to produce flexible conductive nanocomposites. Interrelationship among composition, processing, microstructure and properties will be discussed.
Nanosized oxides, especially transitional metal oxides, have various interesting properties, making them useful for various applications, such as gas sensing, catalysts and energy storage. Wet chemical methods have been heavily developed to synthesize nanosized oxides. These methods encountered several disadvantages, including complicated processing, use of expensive precursors, time consuming and low productivity. In contrast, a simple oxidation method has been used to synthesize nanosized oxides, from metallic precursor powder activated by using high-energy ball milling. The low temperature oxidation caused no significant grain growth and made it possible to incorporate with nano-carbon materials, forming nanocomposite or nanohybrid particles, with potential applications in energy storages. Preliminary results in this study will be summarized and possible future works will be discussed.
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