Thermal analysis for nano powders of iron and zinc by DSC

摘要：

　　Nano powders (NPs) are common and frequently employed in industry,and the iron is mostly applied in high-performance magnetic materials and pollutants treatment for groundwater,and the zinc is widely used in brass,bronze,die casting metal,alloys,rubber,and paints,etc.Nonetheless some disasters induced by metal powders owing to lack of related safety information.In 2011,three metal iron dust flash fires occurred over a periods of five months and killed total of five workers in Hoeganaes Corp.,USA.,In fact the U.S.Chemical Safety and Hazard Investigation Board (CSB) in 2006 recommended that the Occupational Safety and Health Administration (OHSA) should issue a federal regulatory combustible dust standard for general industry,still no comprehensive OSHA standard to prevent these accidents.In this study,we first utilized differential scanning calorimetry (DSC) and applied the thermal analysis technique to evaluate thermal hazards associated with the nano iron and zinc powders,we then applied thermal analysis software to evaluate the related thermal safety information such as the exothermic onset temperature (To),peak of temperature (Tp),heat of reaction (△H),etc.The nano iron powder experimental results of To were 135-140℃,148-158℃,and 141-149℃ for 15nm,35nm,and 65nm,respectively.As for the △H were larger than 3,800 J/g,5,000 J/g,and 3,900 J/g for 15nm,35nm,and 65nm,respectively.The 100nm nano zinc powder of To was 282℃ and △H was 4,262 J/g.Such safety information can benefit relevant NPs industries for preventing the accident and strengthen its protective measures and emergency response.

关键词： Nano powders (NPs) safety information differential scanning calorimetry (DSC) thermal analysis

作者: S.T.HUANG Y.S.DUH T.Y.HSIEH Y.Y.SUN J.M.TSENG J.Z.LIN H-C.WU C.S.KAO

作者单位: Institute of Safety and Disaster Prevention Technology,Central Taiwan University of Science and Tech Department of Safety Health and Environmental Engineering,National United University,Miaoli,Taiwan,C Institute of Occupational Safety and Health,Council of Labor Affairs,Taipei,Taiwan,China

会议类型: 国际会议

会议名称: 2012 International Symposium on Safety Science and Technology (2012安全科学与技术国际会议)

会议地点: 南京

会议语种:英文

页码: 518-522

在线出版日期: 2012-10-23（万方平台首次上网日期，不代表论文的发表时间）