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題名 | 在粉體填裝過程中奈米粉體的特性對空氣逸散的影響=The Effect of Characteristics of Nanopowders on Airborne Emission in the Powder-Filling Process |
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作者 | 李書安; 柯偉祥; 廖千驊; 陳春萬; 蔡春進; Lee, Shu-an; Ko, Wei-hsiang; Liao, Chien-hua; Chen, Chun-wan; Tsai, Chun-jian; |
期刊 | 勞工安全衛生研究季刊 |
出版日期 | 20121200 |
卷期 | 20:4 2012.12[民101.12] |
頁次 | 頁452-462 |
分類號 | 440.34 |
語文 | chi |
關鍵詞 | 奈米粉體; 逸散; 螺旋式下料桿填充系統; 有效密度; Nanopowder; Emission; Auger-type filling system; Apparent density; |
中文摘要 | 本研究主要是探討在粉體填裝過程中,奈米粉體的特性(例如:種類、大小、形狀與有效密度)對粉體逸散至空氣中的影響。實驗於20m3之通風換氣室中進行奈米粉體填裝過程的逸散試驗。奈米粉體以螺旋式下料桿填充系統(auger-type filling system)進行下料,再以ElectricalLow Pressure Impactor (ELPI)即時量測奈米粉體在填裝過程逸散至空氣中的情形。結果發現8~10 μm的二氧化矽粉體為受試粉體中逸散至空氣的濃度最高。10~30 nm的奈米氧化鋁逸散至空氣中的濃度較微米以及次微米的粉體高。球狀奈米氧化鋅比針狀奈米氧化鋅在空氣中微粒的逸散濃度高。不論粉體的形狀與大小,粉體的逸散量與粉體的有效密度呈現負相關。另外,奈米粉體、次微米粉體以及微米粉體,多以微米以及次微米的形式存在於空氣中。因此,要控制奈米粉體在填裝過程中的逸散,必須從奈米粉體種類、粒徑大小、形狀以及密度去做規範。 |
英文摘要 | This study is to investigate the effect of the characteristics of nanopowders (such as type, size, shape and density) on airborne emission of nanopowders in the powder-filling (PF) process. The experiment was conducted in a 20 m3 ventilation chamber to investigate the fugitive particles in the PF process. Nanopowders were unloaded using an auger-type filling system and then measured timely for airborne emission in the PF process using an electrical low pressure impactor (ELPI). The results show that the airborne concentrations of 8~10 μm SiO2 powders were found to be the greatest among all the tested powders. The airborne concentrations of fugitive particles were found to be higher for 10~30 nm Al2O3 nanopowders than those for micro- and submicro- powders. The airborne concentrations of fugitive particles were higher for ball-shape ZnO nanopowders than those for needle-shape ones. Regardless of shape and size, the airborne emission of powders was negatively associated with the apparent density of powders. In addition, the airborne emission of nano-, submicro- and micropowders were mostly presented in the micro- and submicro- size range. Therefore, in order to control fugitive particles in the PF process, it is necessary to regulate the type, size, shape and density of nanopowders. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。