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

CREST HBCU-RISE：用于特殊应用的嵌入纳米结构的陶瓷的制备和表征在科学和技术卓越研究中心的支持下，HBCU科学和工程研究基础设施(CREST HBCU-RISE)，该项目旨在通过研究用于能源生产和节能的材料来解决能源危机。在这个项目中，将研究在压力下产生电能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光产生的高效荧光粉涂层。这将应用于制造节能和坚固耐用的照明设备。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强人们对制造效率更高的小型压电器件和发光二极管灯泡的知识，这些LED灯泡的光输出类似于白炽灯的输出。该项目涉及微晶玻璃和压电陶瓷的制备和表征。在环境空气或氢气气氛中，采用熔融猝灭技术可制备出镶嵌有Ag和R3+(R代表稀土)的多元氧化物玻璃。掺Eu和/或Sm的玻璃将被用于白光产生和光学烧孔(光学数据存储)应用。R3+掺杂玻璃将被用于光学温度传感。此外，如果银金属粒子与吸收405 nm的稀土离子之间存在共振，则玻璃的发射强度可能会增加。因此，热处理和氢气气氛将被用来诱导玻璃中的银金属颗粒。无铅化学物质(碱性Nb酸盐和金属钛酸盐)将通过丝网印刷/Doctor刀片和静电纺丝技术来制备压电陶瓷薄膜。将测量样品的铁电、压电和热释电系数来表征它们。通过在样品中嵌入纳米结构，样品的特性和品质因数将得到改善。这些样品将被研究用于能源生产、生物传感和其他应用。这一CREST HBCU Rise项目将通过改善物理系的研究设施，并在未来培养更多的少数民族博士生，进入STEM学科，从而改善大学的能力建设。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研究生的成功培养，特别是那些来自HBCUSTEM中代表性不足的群体的博士生。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。

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.