Acta Chimica Sinica ›› 2012, Vol. 70 ›› Issue (9): 1135-1138.DOI: 10.6023/A1107191 Previous Articles    


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
  • 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).

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