激光粒度仪测量上限用毫米级粒度标准物质  

Millimeter-scale particle size standard reference materials for measuring upper limit of laser particle size analyzers

作　　者：陈胜利[1] 朱秀芹 CHEN Shengli;ZHU Xiuqin(College of Chemical Engineering and Environment,China University of Petroleum(Beijing),Beijing 102249,China;Beijing Nanowize Standard Materials Co.,Ltd.,Beijing 102200,China)

机构地区：[1]中国石油大学(北京)化学工程与环境学院,北京102249 [2]北京纳微标物科技有限公司,北京102200

出　　处：《中国粉体技术》2025年第1期110-117,共8页China Powder Science and Technology

基　　金：国家重点研发计划资助项目,编号:2021YFA1501203。

摘　　要：【目的】解决我国激光粒度仪测量上限现状不清楚的问题,研制用于判断激光粒度仪测量上限的毫米级颗粒粒度标准物质。【方法】利用悬浮聚合再筛分法制备标称粒径分别为0.6、0.8、1.0、1.1 mm的聚苯乙烯微珠粒度标准物质;利用经NIST SRM2800测微尺校准的光学显微镜对制得的标准物质进行定值。【结果】制得的4种粒度标准物质的体积中位粒径分别为(0.553±0.007)、(0.749±0.008)、(0.925±0.008)、(1.07±0.01)mm;利用制得的粒度标准物质检验了国内外6个公司生产的7种型号激光粒度仪的测量上限,发现只有部分型号的粒度仪能准确测量毫米级粒度标准物质。【结论】制得的毫米级粒度标准物质样品均匀、稳定,粒径定值结果溯源至He-Ne激光波长,准确可靠,使得我国粒度标准物质体系更完善;激光粒度仪测量上限不仅取决于光探测器最内侧单元的半径,还取决于其使用光源的激光质量。Objective To address the unclear measurement upper limits of laser particle size analyzers in China,the study develops millimeter-scale particle size standard materials to evaluate performance of these devices,filling a significant gap in this field.Methods Polystyrene(PS)microbeads with nominal diameters of 0.6,0.8,1.0,and 1.1 mm were prepared using suspension polymerization-partial sulfonation-sieving method.These microbeads were designed to serve as particle size standard materials.An optical microscope calibrated with an NIST SRM2800 micrometer was employed to measure the particle sizes of these four standard materials.Their homogeneity and stability were evaluated,and the measurement results were traceable to the wavelength of He-Ne lasers.These millimeter-scale particle size standards were subsequently used to assess several commonly used laser particle size analyzers available on the Chinese market.Results and Discussion The polystyrene microbeads exhibited excellent sphericity,a narrow particle size distribution,and outstanding homogeneity and stability.The volume median diameters of these samples were(0.553±0.007),(0.749±0.008),(0.925±0.008),and(1.07±0.01)mm,respectively.These measured diameters were accurate,reliable,and traceable to the He-Ne laser wavelength.When tested,only certain particle size analyzers were capable of accurately measuring all four types of millimeter-scale standard materials.Some analyzers could only measure 1-2 sample types accurately,while others failed to measure millimeter-scale particle size standards at all.Analyzers with the smallest measurement deviations were produced by three companies and used He-Ne laser sources,whereas those with larger deviations used more affordable semiconductor laser sources.Conclusion The four types of millimeter-scale particle size standard materials fill a critical gap in millimeter-scale particle size standards in China and enhance the country’s overall particle size standard system.To evaluate the measurement upper limits of laser parti

关 键 词：颗粒粒度 标准物质 聚苯乙烯微珠 激光粒度仪 测量上限 

分 类 号：TQ577.7[化学工程—精细化工] TB44[一般工业技术]