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Volume 36 Issue 2
Jul.  2019
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Article Navigation >  Nuclear Physics Review  > 2019  >  36(2): 224-229

YE Cheng, ZHANG Jian, FU Shangchao, ZHU Ruihua, WU Caiyu. Amorphization of Ca8LnNa(PO4)6F2(Ln=La, Nd and Sm) Apatite Ceramics Induced by Kr Ion Irradiation[J]. Nuclear Physics Review, 2019, 36(2): 224-229. doi: 10.11804/NuclPhysRev.36.02.224
Citation: YE Cheng, ZHANG Jian, FU Shangchao, ZHU Ruihua, WU Caiyu. Amorphization of Ca8LnNa(PO4)6F2(Ln=La, Nd and Sm) Apatite Ceramics Induced by Kr Ion Irradiation[J]. Nuclear Physics Review, 2019, 36(2): 224-229. doi: 10.11804/NuclPhysRev.36.02.224
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Amorphization of Ca8LnNa(PO4)6F2(Ln=La, Nd and Sm) Apatite Ceramics Induced by Kr Ion Irradiation

doi: 10.11804/NuclPhysRev.36.02.224

  • College of Energe, Xiamen University, Xiamen 361102, Fujian, China

Funds:  Fujian Provincial Natural Science Foundation(2017J01007)
  • Received Date: 2018-09-19
  • Rev Recd Date: 2019-03-13
  • Publish Date: 2019-06-20
  • The apatite structure material Ca8LnNa(PO4)6F2(Ln=La, Nd and Sm) were successfully synthesized by the solid state reaction method, and the single phase was confirmed by normal X-ray diffraction(XRD). Three kinds of samples were irradiated with 800 keV Kr2+ at room temperature, then the irradiated samples were characterized by grazing incidence X-ray diffraction(GIXRD) to identify the structures of irradiation layer. Crystalline to amorphization phase transition was observed in these three kinds of samples within the irradiation dose (1.0×1014~7.0×1014 cm-2). However, the abilities to resist amorphization of the three samples are different, the relationship of the ability to resist amorphization is Ca8LaNa(PO4)6F2 > Ca8NdNa(PO4)6F2 > Ca8SmNa(PO4)6F2. The ion radius of the lanthanide nuclides in Ca8LnNa(PO4)6F2 are more smaller, more lanthanide nuclides will occupy the Ca(2) positions and form ionic bonds with F. Meanwhile, the ionic bonding between lanthanide nuclides and Ca are weaker than Ca-F. Therefore, the ion radius of the lanthanide nuclides are more smaller, the more point defects will remain under irradiation, and the crystalline to amorphous phase transition is more likely to occur.
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Amorphization of Ca8LnNa(PO4)6F2(Ln=La, Nd and Sm) Apatite Ceramics Induced by Kr Ion Irradiation

doi: 10.11804/NuclPhysRev.36.02.224
  • College of Energe, Xiamen University, Xiamen 361102, Fujian, China
Funds:  Fujian Provincial Natural Science Foundation(2017J01007)
  • Received Date: 2018-09-19
  • Rev Recd Date: 2019-03-13
  • Publish Date: 2019-06-20

Abstract: The apatite structure material Ca8LnNa(PO4)6F2(Ln=La, Nd and Sm) were successfully synthesized by the solid state reaction method, and the single phase was confirmed by normal X-ray diffraction(XRD). Three kinds of samples were irradiated with 800 keV Kr2+ at room temperature, then the irradiated samples were characterized by grazing incidence X-ray diffraction(GIXRD) to identify the structures of irradiation layer. Crystalline to amorphization phase transition was observed in these three kinds of samples within the irradiation dose (1.0×1014~7.0×1014 cm-2). However, the abilities to resist amorphization of the three samples are different, the relationship of the ability to resist amorphization is Ca8LaNa(PO4)6F2 > Ca8NdNa(PO4)6F2 > Ca8SmNa(PO4)6F2. The ion radius of the lanthanide nuclides in Ca8LnNa(PO4)6F2 are more smaller, more lanthanide nuclides will occupy the Ca(2) positions and form ionic bonds with F. Meanwhile, the ionic bonding between lanthanide nuclides and Ca are weaker than Ca-F. Therefore, the ion radius of the lanthanide nuclides are more smaller, the more point defects will remain under irradiation, and the crystalline to amorphous phase transition is more likely to occur.

YE Cheng, ZHANG Jian, FU Shangchao, ZHU Ruihua, WU Caiyu. Amorphization of Ca8LnNa(PO4)6F2(Ln=La, Nd and Sm) Apatite Ceramics Induced by Kr Ion Irradiation[J]. Nuclear Physics Review, 2019, 36(2): 224-229. doi: 10.11804/NuclPhysRev.36.02.224
Citation: YE Cheng, ZHANG Jian, FU Shangchao, ZHU Ruihua, WU Caiyu. Amorphization of Ca8LnNa(PO4)6F2(Ln=La, Nd and Sm) Apatite Ceramics Induced by Kr Ion Irradiation[J]. Nuclear Physics Review, 2019, 36(2): 224-229. doi: 10.11804/NuclPhysRev.36.02.224
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