| 加速器质谱测量用NH4Hf2F9的制备及表征 |
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| 引用本文： | 姜涛,杨君,杨亮,何玉晖.加速器质谱测量用NH4Hf2F9的制备及表征[J].化学学报,2012,70(9):1135-1138. |
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| 作者姓名： | 姜涛 杨君 杨亮 何玉晖 |
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| 作者单位： | 中国工程物理研究院核物理与化学研究所,绵阳,621900 |
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| 摘 要： | 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5～20μm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.
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| 关 键 词： | 加速器质谱 HfO2 NH4F NH4Hf2F9 制备 表征 |
Preparation and Characterization of NH4Hf2F9 for Accelerator Mass Spectrometry Measurement |
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| Institution: | Jiang,Tao Yang,Jun Yang,Liang He,Yuhui(Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Mianyang 621900) |
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| Abstract: | 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 NH4Hf2F9powder 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,NH4Hf2F9powder 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 NH4Hf2F9powder,and Hf mainly existed in quadrivalent state(+4). |
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| Keywords: | accelerator mass spectrometry HfO2 NH4F NH4Hf2F9 preparation characterization |
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