The isometric pyrochlore structure type A₂B₂O₇ possesses a wide range of technological applications such as electrolytes in solid oxide fuel cell, thermal barrier coating, and nuclear waste form for actinides incorporation. Pyrochlore series Gd₂Ti_2-yZr_yO₇ with y = 0.0, 0.4, 0.8, 1.2, 1.6, and 2.0 was prepared using standard solid-state method. X-ray diffraction along with SEM studies was carried out to investigate the effect of Zr content on microstructure and the swift heavy ion irradiation-induced effects on the structural integrity of Gd₂Ti_2-yZr_yO₇ pyrochlore family. Rietveld refinement showed a systematic increase in the lattice parameter on increasing the value of y in Gd₂Ti_2-yZr_yO₇ and an abrupt enhancement in the value of the O_48f positional parameter at y ≥ 1.6. The intensity of superstructure peaks gradually decreases in the X-ray diffraction pattern on increasing the Zr content, which indicates the transformation from the ordered pyrochlore structure to disordered anion-deficient fluorite structure. On irradiation with swift heavy ion (120 MeV Au⁺⁹), the compositions with y = 0.0 and 0.4 were completely amorphized and the composition with y = 0.8 and 1.2 partially amorphized whereas no sign of amorphization was observed in the Zr rich (y = 1.6 and 2.0) compositions. The composition with y ≥ 1.6 retains its crystallinity even at higher ion fluence of 1 × 10¹⁴ ions/cm². These results are explained on the basis of the ratio of cationic radii r_A/r_B and in turn the ‘x’ parameter of 48f oxygen.

等距烧绿石结构类型A ₂ B ₂ O ₇具有广泛的技术应用，例如固体氧化物燃料电池中的电解质，热障涂层和掺入act系元素的核废料形式。使用标准固态方法制备y = 0.0、0.4、0.8、1.2、1.6和2.0的烧绿石系列Gd ₂ Ti _2-y Zr _y O ₇。通过X射线衍射和SEM研究，研究了Zr含量对显微组织的影响以及快速重离子辐照对Gd ₂ Ti _2-y Zr _y O ₇的结构完整性的影响。烧绿石家族。Rietveld精炼显示，随着Gd ₂ Ti _2-y Zr _y O ₇中y值的增加，晶格参数有系统地增加，并且当y≥1.6时，O _48f位置参数的值突然增加。随着Zr含量的增加，上层结构峰的强度在X射线衍射图中逐渐降低，这表明从有序的烧绿石结构转变为无序的缺乏阴离子的萤石结构。快速重离子（120 MeV Au ⁺⁹），y = 0.0和0.4的成分被完全非晶化，而y = 0.8和1.2的成分被部分非晶化，而在富含Zr（y = 1.6和2.0）的成分中没有观察到非晶化的迹象。y≥1.6的组合物即使在1×10 ¹⁴离子/ cm ^2的较高离子通量下也保持其结晶度。这些结果是根据阳离子半径r _A / r _B的比例以及48f氧的'x'参数来解释的。