SRM772a 镍球标准品测量

SRM772a是美国国家标准与技术研究院（NIST）推出的磁矩标准镍球，核心用途为校准振动样品磁力计等测量材料磁性能的仪器，为磁性检测提供可溯源的标准依据。该标准品在材料科学、磁学检测等领域具有不可替代的校准价值。

SRM772a 镍球标准品产品采用纯度99.999%的退火镍丝制备，经研磨加工为球体，直径精准控制在2.383mm，质量为63.16mg。制备过程中，球体先后经丙酮、甲醇超声清洗，再于1220K干燥氢气氛围中退火2小时，最终形成平均晶粒尺寸约100μm的等轴微观结构，保障磁性能稳定性。

SRM772a 镍球标准品其核心认证值明确：298K、398kA/m（5000Oe）条件下，磁矩认证值为3.47mA•m²±0.01mA•m²（3.47emu±0.01emu），不确定度基于ISO及NIST指南计算，覆盖因子k=2，对应95%置信水平。在293K-303K、318kA/m-478kA/m范围内，温度与磁场校正对不确定度影响微弱，扩展范围后不确定性约加倍。

使用时需用非磁性镊子操作，避免划伤、污染或变形，储存于专用容器中，远离腐蚀性环境与高温。SRM772a 镍球标准品作为权l威磁矩标准，它不仅是磁力计日常校准的基准，也为新型磁性材料检测设备的研发与验证提供了精准参照。

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东莞市百顺生物科技有限公司专业提供SRM772a 镍球标准品，欢迎咨询定购。