A moderate pyrochlore solid solution range of 0.00 ≤ x ≤ 0.64 was observed in the Bi_3.36Fe_2.08+xSb_2.56-xO_14.56-x (BFS) system prepared by solid-state reaction at 925 °C for 2 days. The overall charge compensation requires a one-to-one cationic replacement and oxygen vacancies, i.e. Sb⁵⁺ ↔Fe³⁺ - O^2-. BFS cubic pyrochlores showed their refined lattice parameters varying linearly in the range of 10.4284 (8)-10.4513(8), thus obeying the Vegard's rule. The measured crystallite sizes by both Scherrer and Williamson-Hall methods were found to be in the range of 46-67 nm; whilst, the larger grain sizes in the range of 0.2-2.9 μm were calculated using scanning electron microscopy (SEM) analysis. The AC impedance analysis also verified a few electrical responses of BFS pyrochlores: (i) BFS pyrochlores had moderate dielectric constants in the range of 24-35 and dielectric losses in the order of 10^-1 at room temperature and 1 MHz, (ii) BFS pyrochlores were not electrically homogeneous with bulk capacitances in the order of 10^-12 Fcm^-1, (iii) a non-Debye type and temperature-dependent relaxation process were discernible and (iv) the movement of charge carrier were either in the long-range or short-range migration subjected to time availability . In addition, BFS pyrochlore thin films had good capacitive behaviour and electrochemical reversibility, according to the cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) analyses. All these excellent properties rendered BFS pyrochlores to be a suitable material for Class 1 ceramic capacitors.

在 925 °C 下通过固态反应制备 2 天的 Bi _3.36 Fe _2.08+x Sb _2.56-x O _14.56-x (BFS) 体系中观察到中等烧绿石固溶范围为 0.00 ≤ x ≤ 0.64 。整体电荷补偿需要一对一的阳离子置换和氧空位，即 Sb ⁵⁺ ↔Fe ³⁺ - O ^2-. BFS 立方烧绿石显示其精细晶格参数在 10.4284 (8)-10.4513(8) 范围内线性变化，因此遵守 Vegard 规则。发现通过 Scherrer 和 Williamson-Hall 方法测得的微晶尺寸在 46-67 nm 范围内；同时，使用扫描电子显微镜 (SEM) 分析计算了 0.2-2.9 μm 范围内的较大晶粒尺寸。交流阻抗分析还验证了 BFS 烧绿石的一些电响应：(i) BFS 烧绿石在室温和 1 MHz 下具有 24-35 范围内的中等介电常数和大约 10 ^{-1 的}介电损耗，(ii) BFS烧绿石在电学上不均匀，体电容约为10 ^-12 Fcm ^-1, (iii) 非德拜型和依赖于温度的弛豫过程是可辨别的，并且 (iv) 电荷载流子的运动是长程或短程迁移，受时间可用性的影响。此外，根据循环伏安法 (CV) 和恒电流充放电 (GCD) 分析，BFS 烧绿石薄膜具有良好的电容行为和电化学可逆性。所有这些优异的特性使 BFS 烧绿石成为 1 类陶瓷电容器的合适材料。