气体吸附法测定粉体比表面积影响因素的研究  

Study about influence factors on determination of specific surface area of powders by gas adsorption

作　　者：谭立新[1] 梁泰然[1] 蔡一湘[1] 陈强[1] 丁燕[1] 

机构地区：[1]广东省工业技术研究院(广州有色金属研究院)粉冶所,广东广州510650

出　　处：《材料研究与应用》2014年第2期137-140,共4页Materials Research and Application

摘　　要：采用气体吸附法测试粉体比表面积,对脱气时间和脱气温度等进行了试验。结果表明,气体吸附法是测量粉体比表面积比较有效的分析方法,测量结果准确、稳定,但样品的脱气温度、脱气时间及样品量对分析结果均有较大影响。如果样品脱气处理不完全,测得的比表面积值偏小。在不破坏样品的情况下,适当提高脱气温度,有助于缩短除气时间,节省分析测试时间。试样量太少,易带来测量偏差;试样量太多,则会增加不必要的测试时间。The specific surface area test by gas adsorption was performed and the contrast experiments of the degassing time and degassing temperature were tested.The results show that gas adsorption is an effective analysis method for measuring specific surface area of powder.The measuring results are accurate and stable,but the degassing temperature,the degassing time and the amount of sample have great influence on the analysis results.If the degassing treatment is not complete,the value of measuring the specific surface area becomes small.Increasing the degassing temperature properly helps to reduce the analysis time without damaging the sample.Fewer samples testing will bring measurement error.Too many samples testing will waste your time.

关 键 词：比表面积 脱气温度 脱气时间 

分 类 号：TB302.1[一般工业技术—材料科学与工程]