中文摘要：

为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5．2GPa压力、1473～1873K温度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，结果证实，在5．2GPa和1873K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开展武器级多余钚和含钚高放废物固化具有重要的科学价值和实际意义。

英文摘要：

In order to investigate the possibility to synthesize cubic pyrochlore Gd2Zr2O7 by solid-solid reactions under high pressure and high temperature conditions, the synthesis experiments were carried out at a fixed pressure of 5.2 GPa and a temperature range of 1473-1 873 K 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 is successfully synthesized at 5.2 GPa pressure and 1 873 K temperature with 30min holding time. The novel method has vitally scientific values and practical significance for immobilization of surplus weapon level plutonium and containing plutonium high level wastes.