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激光加工仿生蜂巢结构制备及其沸腾传热性能研究
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作者 帅茂 梁富业 +1 位作者 席小倩 孙亚隆 《激光杂志》 CAS 北大核心 2022年第4期157-162,共6页
池沸腾作为一种高效的能量转换方式,在提升能源系统效率及强化高功率电子设备热管理等领域具备重要作用。采用激光加工技术在铜片表面制备了仿生蜂巢结构(BHS),使用扫描电镜对BHS表面形貌进行观察,探究了不同加工参数对微结构形貌和沸... 池沸腾作为一种高效的能量转换方式,在提升能源系统效率及强化高功率电子设备热管理等领域具备重要作用。采用激光加工技术在铜片表面制备了仿生蜂巢结构(BHS),使用扫描电镜对BHS表面形貌进行观察,探究了不同加工参数对微结构形貌和沸腾传热性能的影响。结果表明,主次沟槽复合结构(BHS-C)对沸腾传热性能具有最佳强化作用。强化效果随着次级沟槽宽度先增加后减小,当次级沟槽间距为180μm时,BHS表面的极限热流密度(CHF)与沸腾换热系数(HTC)分别达到了198.48 W/cm^(2)和29.05 W/cm^(2)·℃,为光滑铜片的1.81倍和4.71倍。显著增强的沸腾传热性能主要归因于主次相间的槽道结构提升了工质的快速回流速率,沟槽内部的微纳结构大幅增加了气泡成核点位置和受热面积。 展开更多
关键词 激光加工 仿生蜂巢结构 池沸腾 极限热流密度
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Study on the growth of honeycomb-like film of basic zinc carbonate induced by bovine serum albumin LB film template
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作者 Haiwei Wang Wenbo Xiao +2 位作者 Xiuling Jia Yang Xiao Zuliang Du 《日用化学工业(中英文)》 CAS 北大核心 2024年第12期1431-1436,共6页
Honeycomb-like films of basic zinc carbonate were successfully prepared on FTO(SnO_(2):F)conductive glass using bovine serum albumin(BSA)as a template at room temperature.After low-temperature annealing,a high-specifi... Honeycomb-like films of basic zinc carbonate were successfully prepared on FTO(SnO_(2):F)conductive glass using bovine serum albumin(BSA)as a template at room temperature.After low-temperature annealing,a high-specific-surface-area porous ZnO film with excellent electron mobility was obtained.The surface morphology,crystallization performance,and photoluminescence characteristics of basic zinc carbonate thin films and annealed ZnO thin film were analyzed by scanning electron microscopy(SEM),transmission electron microscopy(TEM),X-ray diffraction(XRD),photoluminescence spectroscopy(PL)and UV-Visible spectroscopy(UV-vis).By comparing with those samples prepared without any protein,it was determined that the complexation between BSA molecules and Zn^(2+)ions was the primary factor in the synthesis of porous films of basic zinc carbonate.The experimental results showed that the ZnO thin film samples prepared with this method had high specific surface area and broadband luminescence characteristics in the near ultraviolet range. 展开更多
关键词 biomimetic mineralization basic zinc carbonate film honeycomb structure photoelectrochemical properties
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