Xu Ya, Du Xiaotong, Wang Zhenhua, Liu Hua, Huang Peng, To Suet, Zhu LiMin, Zhu Zhiwei
School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu, 210094, China.
Key Laboratory for UV Emitting Materials and Technology of Ministry of Education, Northeast Normal University, 5268 Renmin Street, Changchun, 130024, China.
Adv Sci (Weinh). 2023 Dec;10(34):e2304756. doi: 10.1002/advs.202304756. Epub 2023 Oct 23.
The high hardness, brittleness, and thermal resistance impose significant challenges in the scalable manufacturing of fused silica lenses, which are widely used in numerous applications. Taking advantage of the nanocomposites by stirring silica nanopowders with photocurable resins, the newly emerged low-temperature pre-shaping technique provides a paradigm shift in fabricating transparent fused silica components. However, preparing the silica slurry and carefully evaporating the organics may significantly increase the process complexity and decrease the manufacturing efficiency for the nanocomposite-based technique. By directly pressing pure silica nanopowders against the complex-shaped metal molds in minutes, this work reports an entirely different room-temperature molding method capable of mass replication of complex-shaped silica lenses without organic additives. After sintering the replicated lenses, fully transparent fused silica lenses with spherical, arrayed, and freeform patterns are generated with nanometric surface roughness and well-reserved mold shapes, demonstrating a scalable and cost-effective route surpassing the current techniques for the manufacturing of high-quality fused silica lenses.
高硬度、脆性和耐热性给广泛应用于众多领域的熔融石英透镜的规模化制造带来了重大挑战。通过将二氧化硅纳米粉末与光固化树脂搅拌混合利用纳米复合材料，新出现的低温预成型技术为制造透明熔融石英部件提供了一种范式转变。然而，制备二氧化硅浆料并小心蒸发有机物可能会显著增加工艺复杂性并降低基于纳米复合材料技术的制造效率。通过在几分钟内将纯二氧化硅纳米粉末直接压在复杂形状的金属模具上，这项工作报道了一种完全不同的室温成型方法，该方法能够在无有机添加剂的情况下大规模复制复杂形状的二氧化硅透镜。在烧结复制的透镜后，生成了具有球形、阵列和自由形式图案的完全透明的熔融石英透镜，其具有纳米级表面粗糙度且模具形状保留良好，展示了一条超越当前技术的可扩展且经济高效的路线，用于制造高质量的熔融石英透镜。
