欧洲杯足球网_欧洲杯网投-投注|官网

　　2017年5月11日，应欧洲杯足球网_欧洲杯网投-投注|官网：材料学院冲击环境材料技术国家级重点实验邀请，法国雷恩大学--法国国家研究中心玻璃和陶瓷实验室主任章向华教授（法国国家科研中心一级主任研究员）访问材料学院，并做了题目为“Glass and ceramics for imaging beyond the visible”的学术报告。欧洲杯足球网_欧洲杯网投-投注|官网：材料学院院长助理张加涛教授，重点实验室朱时珍教授以及学院和实验室其他老师和研究生们参加了此次报告会。

　　章向华教授在国际多种专业杂志上发表科技论文280篇，在红外玻璃研究与开发方面获得16项专利，被邀请在70次国际学术会议上作特邀报告。获得法兰西科学院院士评选的 EADS(空客集团) 大奖，法兰西科学院院士评选 Ivan Peches 大奖，促进科技研究中法协会JX International 科技应用奖，法国国防部“国防革新”奖，IBM青年科学家奖等。

　　报告中，章向华教授详细地介绍了红外玻璃和陶瓷研究及在在红外成像方面的应用，报告深入浅出，并与在座的师生展开广泛而深入的交流，大家争相提问，现场气氛热烈。最后欧洲杯足球网_欧洲杯网投-投注|官网：材料学院向章向华教授赠予纪念品，全体师生合影留念。此次报告圆满完成。

　　报告摘要： The visible range is a small part of the electromagnetic spectrum. Imaging beyond this range, in the infrared region for example, can give much additional information. There are however very few materials transparent in the 8-12 ?m region, which is the most used window for thermal imaging (night vision) as it corresponds to the maximum emission of bodies at room temperature. Germanium, a rare and expensive element, has very interesting optical properties with very high refractive index and very low chromatic dispersion between 8-12 ?m. Another mostly used material is the polycrystalline ZnSe that is produced with the long and expensive CVD (Chemical Vapour Deposition) technique.

　　Chalcogenide glasses are glasses based on sulfur, selenium and tellurium. They have been intensively studied mainly due to its large optical transmission window from the visible to  far infrared region. Sulfide glasses are typically transparent from 0.5 ?m to 11 ?m, selenide glasses from 1 ?m to 14 ?m and telluride glasses from 2 ?m to 18 ?m. Potential and current applications include optics for night vision, infrared laser power delivery, remote chemical and biological sensing. The main advantage of these glasses, compared to germanium and ZnSe is the possibility of obtaining glass fibres and complex optical components by moulding thanks to their vitreous nature Sulfide ceramics present much better mechanical and thermal resistance. They are especially useful in harsh environment where resistance to high temperature or/and erosion is needed.

　　The preparation, properties and applications of these infrared transmitting materials will be discussed.