【摘要】 金刚砂标准物质用于校正粉末流动性测定仪的漏斗，以保证粉末流动性测量的准确性。该标准物质化学性能稳定、耐磨、无磁、均匀、试验的重现性好，各项指标均符合ＩＳＯ４４９０的规定更多还原

【Abstract】 A standard emery grit for determination of flowability of powders has been developed which shall be used for calibrating of the funnel of the apparatus. We tested many materials, finally a sort of natural mineral was chose as to make emery grit. The emery grit has had success though dressing and sieving. The reference material. has good wear resistace, chemical stability, homogeneity and is free of magnetic particles. All technical specifications of the emery grit accord with the demands of ISO4490.更多还原