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学术报告:耐高温的无机纤维

报告题目:耐高温的无机纤维

主  讲  人:Professor Dr. Toshihiro ISHIKAWA

时  间:2015年12月18日上午10:00开始

地  点:大学城校园工学二号馆机电工程学院205会议室

摘要:

     Up to now, many types of inorganic fibers have been developed. The main purposeis to develop composite materials with lightweight and high fracture toughness. Of these, carbon fiberhas already established a very big market. By the way, representative oxide fibers (alumina/silica-based fibers)showheat-resistance’s limitation at around 1200oC. In order to improve the heat-resistance, some types of eutectic oxide-fibers have been studied. On the other hand, SiC-based fibers with both heat-resistance and oxidation-resistance were developed over 30 years ago. After that, lots of improvements have been performed, and finally several types of excellent heat-resistant SiC-polycrystalline fibers, which can be used up to about 1800oC, were developed from polycarbosilane. Using these fibers,lots of applications have been considered in the fields of aerospace, nuclear system, and so on. Furthermore, making the best use of the aforementioned production process, several types of functional ceramic fibers with functional surface layers also have been developed. In this paper, historical view point on ceramic fibers will be also presented.

报告人简历:

  Dr. Toshihiro Ishikawa has conducted unique and innovative works on multifunctional engineering ceramics and composites during the past thirty years and has made extraordinary and outstanding contributions to science and technology in this field.

  He first was engaged in the development of new type SiC-based fibers, which resulted in a crystalline SiC fiber, so called Tyranno SA-fiber, capable of withstanding high temperatures up to 2000oC.  This remarkable success has been published in Nature, Feb. 1998 and known to ceramic communities all over the world.  Dr. Ishikawa also developed a new type of tough, thermally conductive material (SA-Tyrannohex); it has a highly ordered, close-packed structure of very fine hexagonal columnar SiC fibers with thin boundaries of carbon, and maintains high strength up to 1600oC in air. This innovative ceramic composite has been world widely introduced through an article in Science, Nov. 1998.  Furthermore, Dr. Ishikawa succeeded in developing the world’s first high-strength titania/silica fiber with a gradient surface layer of titania nanocrystals, which effectively decomposes many types of organic chemicals and bacteria into CO2 and water by irradiation with UV light. This outstanding achievement has been published in the March 2002 issue of “Nature”. The concept proposed here by Dr. Ishikawa, which is applicable to a variety of materials, components and systems including catalysts, composites and environmental barrier coatings, has caused significant influence onto current status of ceramic materials development in the world.

  Due to his innovative achievements in basic research as well as in commercialization, Dr. Ishikawa has received a number of awards and prizes including GSC Award(2004), Award from the Minister for Environment (2004), Yamazaki Teiichi Prize, Japan (2003), Award from the Society of Chemical Engineers, Japan (2003), and Award from the Society of Polymer Science, Japan (1992).  Among them, Yamazaki Teiichi Prize is a prestigious one given to the most notable researcher who has made significant achievements in basic research and has succeeded in applying them into industry.  Dr. Ishikawa is the grade of "Fellow" of the American Ceramic Society and "Advisory Board Member" of “World Academy of Ceramics”.

  He has authored or co-authored more than 100 technical papers and has 180 patents.  He has delivered key-note and invited lectures and has served as organizer in many international conferences.  In addition, Dr. Ishikawa had been an associate editor of the International Journal of Applied Ceramic Technology (the American Ceramic Society) for many years, and has made a great contribution to advancements of ceramic application technologies in the international ceramic community.

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