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化学学报
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化学学报 ›› 2012, Vol. 70 ›› Issue (9): 1135-1138.DOI: 10.6023/A1107191 上一篇    

研究简报

加速器质谱测量用NH4Hf2F9 的制备及表征

姜涛, 杨君, 杨亮, 何玉晖   

  1. 中国工程物理研究院核物理与化学研究所 绵阳 621900
  • 投稿日期:2011-07-19 修回日期:2011-12-06 发布日期:2011-12-22
  • 通讯作者: 姜涛; 何玉晖 E-mail:caepnpcjt@163.com
  • 基金资助:

    国家自然科学基金(No. 11075142)资助项目.

Preparation and Characterization of NH4Hf2F9 for Accelerator Mass Spectrometry Measurement

Jiang Tao, Yang Jun, Yang Liang, He Yuhui   

  1. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900
  • Received:2011-07-19 Revised:2011-12-06 Published:2011-12-22
  • Supported by:

    Project was supported by the National Natural Science Foundation of China (No. 11075142).

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研究了加速器质谱测量用NH4Hf2F9 的制备方法, 用XRD, SEM, XPS 和TG-DTA 表征其结构和组成. 结果表明:NH4Hf2F9 样品在573 K 热处理1 h 后物相并未变化, 而在773, 973, 1173, 1373 K 热处理1 h 后物相则都转变为HfO2.TG-DTA 的分析表明从573 K 开始NH4Hf2F9 样品逐渐开始分解, 至1073 K 时失重约78%. 样品微观形貌为不规则的固体颗粒, 颗粒的粒径分布较大, 范围在5～20 μm 之间. 粉末样品主要含有Hf, N 和F 元素, 其中Hf 主要以(+4)价存在.

关键词: 加速器质谱, HfO2, NH4F, NH4Hf2F9, 制备, 表征

The method of multiphase synthesis of NH4Hf2F9 for accelerator mass spectrometry (AMS) measurement was researched. The structure and composition of NH4Hf2F9 powder were characterized by XRD, SEM, XPS and TG-DTA. When the NH4Hf2F9 powder was heated at 573 K for 1 h, the powder phase was still NH4Hf2F9. After being heated at 773, 973, 1173 and 1373 K for 1 h, respectively, they all transformed to HfO2. When the temperature was above 573 K, NH4Hf2F9 powder began to decompose. When the temperature reached 1073 K, the weight loss of NH4Hf2F9 powder was about 78%. The powder shape was irregular, and powder size was between 5 and 20 μm in the SEM images. The XPS results show that there were Hf, N and Hf in NH4Hf2F9 powder, and Hf mainly existed in quadrivalent state (+4).

Key words: accelerator mass spectrometry, HfO2, NH4F, NH4Hf2F9, preparation, characterization