CREST HBCU-RISE: Preparation and Characterization of Ceramics Embedded with Nanostructures for Specialized Applications

顶部HBCU-上升：在HBCU科学与工程研究基础设施（CREST HBCU-RISE）的科学与技术卓越研究中心的支持下，该项目旨在通过研究能源生产和节能材料来解决能源危机。本项目将研究在受到应力时发电的压电材料和无铅陶瓷。该项目旨在开发用于二极管泵浦白色光产生的高效磷光体涂层。这将应用于构建节能和鲁棒的照明设备。节能材料的设计是一项持续的全球努力。该项目的成果可能会增加知识，以建立更好的效率和LED灯泡的光输出类似于白炽灯泡产生的小规模压电装置。该项目涉及玻璃陶瓷和压电陶瓷的制备和表征。在大气或氢气气氛中，采用熔体淬冷技术制备了Ag和R ~（3+）（R为稀土）离子嵌入的多元氧化物玻璃。将研究铕和/或钐掺杂的玻璃用于白色光产生和光学烧孔（光学数据存储）应用。R3+掺杂的玻璃将被研究用于温度的光学传感。此外，如果在Ag金属颗粒和吸收405 nm的稀土离子之间存在共振，则玻璃发射强度可以增加。因此，热处理以及氢气氛将用于诱导玻璃中的银金属颗粒。压电陶瓷薄膜将由无铅化学品（碱金属钛酸盐和金属钛酸盐）通过丝网印刷/刮刀和静电纺丝技术制成。测量样品的铁电、压电和热释电系数来表征它们。通过将纳米结构嵌入样品，将改善样品的特性及其品质因数。这些样品将用于能源生产、生物传感和其他应用。这个CREST HBCU RISE项目将通过改善物理系的研究设施和培养更多的少数民族博士生来提高大学的能力建设，进入STEM学科。HBCU科学与工程研究基础设施（CREST HBCU-RISE）计划支持机构研究能力的扩展以及博士生的成功培训，特别是那些来自HBCUs的STEM代表性不足的团体。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的智力价值和更广泛的影响审查标准。

CREST HBCU-RISE: Preparation and Characterization of Ceramics Embedded with Nanostructures for Specialized Applications With support from the Centers of Research Excellence in Science and Technology HBCU Research Infrastructure for Science and Engineering (CREST HBCU-RISE), this project aims to address energy crisis by investigating materials for energy production and energy conservation. Piezoelectric materials that generate electricity when subjected to stress, and lead-free ceramics will be investigated for this project. The project aims to develop efficient phosphor coatings for diode pumped white light generation. This will have applications to build energy efficient and robust lighting devices. The design of energy efficient materials is an ongoing global effort. The project outcomes may enhance the knowledge to build small scale piezoelectric devices with better efficiency and LED bulbs with light output similar to that produced by incandescent lightbulbs. The project deals with preparation and characterization of glass ceramics and piezoelectric ceramics. Multi-element oxide glasses embedded with Ag and R3+ (R for rare-earth) ions will be made by the melt-quenching technique in ambient air or hydrogen atmosphere. Europium and/or Samarium doped glasses will be investigated for white light generation and optical hole burning (optical data storage) applications. R3+ -doped glasses will be investigated for optical sensing of temperature. Moreover, glass emission intensity may increase if resonance exists between Ag metallic particles and rare-earth ions which absorb 405 nm. Hence, heat treatment as well as hydrogen atmosphere will be used to induce silver metallic particles in glasses. The piezoelectric ceramic films will be fabricated from lead-free chemicals (alkali niobates and metallic titanates) by screen printing/Doctor Blading and electrospinning techniques. Ferroelectric, piezoelectric and pyroelectric coefficients of the samples will be measured to characterize them. Sample characteristics and their figures of merit will be improved by embedding them with nanostructures. These samples will be investigated for energy production, biosensing and other applications. This CREST HBCU RISE project will improve the capacity building of the university by improving the research facilities of the Physics Department and training many more minority PhD students in future, into STEM disciplines. The Centers of Research Excellence in Science and Technology HBCU Research Infrastructure for Science and Engineering (CREST HBCU-RISE) program supports the expansion of institutional research capacity as well as the successful training of doctoral students, especially those from groups underrepresented in STEM at HBCUs.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.