【作者】 唐敬友； 牟涛；

【Author】 TANG Jing-you~1,MU Tao~2 (1 Key Laboratory of Defensive Discipline on Nuclear Wastes and Environmental Safety,SWUST,Mianyang 621010, China;2 China Academy of Engineering Physics,P.O.Box 919-71,Mianyang 621900,China)

【机构】 西南科技大学核废物与环境安全国防重点学科实验室；

【摘要】 为了探索高温高压固相反应法合成Gd₂Zr₂O₇烧绿石的可能性,以Gd₂O₃和ZrO₂的混合粉体为原料,在压力为5.2GPa、温度为1473～1873K范围内进行了实验研究。通过XRD对合成样品进行了结构表征,证实了在5.2GPa和1873K的条件下保温保压30min,成功地合成出单一物相的、具有立方烧绿石结构的Gd₂Zr₂O₇化合物。这种新的合成方法对于钚及"次要"锕系核素的固化研究具有重要的科学价值和实际意义。更多还原

【Abstract】 To investigate the possibility to synthesize cubic pyrochlore Gd₂Zr₂O₇ by solid-solid reactions under high pressure and high temperature conditions,experiments were carried out at a fixed pressure of 5.2GPa and a temperature range of 1573-1873K using the mixed powders of Gd₂O₃ and ZrO₂ as starting materials.The as-synthesized samples were characterized by XRD.The results show that a single phase compound Gd₂Zr₂O₇ with a cubic pyrochlore structure was successfully synthesized at the applied pressure and 1873K temperature with 30 min holding time.The novel method has vitally scientific values and practical significance for the researches on immobilization of plutonium and ’minor’ actinides.更多还原