Structural and transport properties of doped bismuth titanates and niobates

Synthesis and Luminescent Properties of Bismuth Titanates Bi1.6HoxTi2O7 – δ and Bi1.6Mg0.1HoxTi2O7 – δ

“…1, additional phase is indicated by asterisk), which was caused by a narrow region of the stability of the pyrochlore structure 1.46 ≤ r(A)/r(B) ≤ 1.78 ( O 6 O') [5]. According to [6][7][8][9][10][11][12][13][14], the pyrochlore structure forms in the Bi 1.6 M x Ti 2 O 7 -δ (M = Cr, Fe, Mn, Co, In, Sc, and Li) system at x ≈ 0.05-0.10.…”

Effect of Li and Li-RE co-doping on structure, stability, optical and electrical properties of bismuth magnesium niobate pyrochlore

“…Materials with the pyrochlore-type structure (A 2 B 2 O 6 O', Fd3m space group), due to their chemical and structural diversity, can possess dielectric properties [1][2][3][4][5][6][7][8] and electronic [9][10][11][12], proton [11][12][13][14][15][16][17], and oxygen [18][19][20] types of conductivity varying in a broad range. These properties, in combination with the high thermal stability of the pyrochlore materials, make them suitable for various applications such as ceramic capacitors [3][4][5][6], electrodes or electrolytes in solid oxide fuel cells (SOFC) [20][21][22][23], sensors [23,24], energy storage materials [25], etc.…”

Low‐temperature dielectric behavior of Sc‐ and In‐doped bismuth titanate pyrochlores

“…Also, the interaction between the doped BTO pyrochlores and metallic electrodes remains unclear. Previously, we experimentally obtained various doped BTO pyrochlores and analyzed the electrophysical properties at high temperatures (≥200°C) 24,36,37 . The electrical conductivity in doped BTO is stated to be strongly dependent on the nature and amount of the dopant atoms.…”

“…Previously, we experimentally obtained various doped BTO pyrochlores and analyzed the electrophysical properties at high temperatures (≥200 • C). 24,36,37 The electrical conductivity in doped BTO is stated to be strongly dependent on the nature and amount of the dopant atoms. Moreover, cation disorder, that is, the dopant distribution over the pyrochlore cation sites, is one of the crucial parameters to determine the properties of the doped pyrochlores.…”