Structural and Electrochemical Characterization of Columnar-Structured Mn-Doped Bi26Mo10O69-d Electrolytes

Year: 2016 Volume: 10 Issue: 2 206 - 210 Pages

• Authors:
• Maria V. Morozova
• Zoya A. Mikhaylovskaya
• Elena S. Buyanova
• Sofia A. Petrova
• Ksenia V. Arishina
• Robert G. Zaharov

Abstract: The present work is devoted to the investigation of two series of doped bismuth molybdates: Bi26-2xMn2xMo10O69-d and Bi26Mo10-2yMn2yO69-d. Complex oxides were synthesized by conventional solid state technology and by co-precipitation method. The products were identified by powder diffraction. The powders and ceramic samples were examined by means of densitometry, laser diffraction, and electron microscopic methods. Porosity of the ceramic materials was estimated using the hydrostatic method. The electrical conductivity measurements were carried out using impedance spectroscopy method.

• Keywords:
• Bismuth molybdate
• columnar structures
• impedance spectroscopy
• oxygen ionic conductors.

Synthesis, Structure and Functional Characteristics of Solid Electrolytes Based on Lanthanum Niobates

Year: 2016 Volume: 10 Issue: 2 201 - 205 Pages

• Authors:
• Maria V. Morozova
• Yulia V. Emelyanova
• Anastasia A. Levina
• Elena S. Buyanova
• Zoya A. Mikhaylovskaya
• Sofia A. Petrova

Abstract: The solid solutions of lanthanum niobates substituted by yttrium, bismuth and tungsten were synthesized. The structure of the solid solutions is either LaNbO4-based monoclinic or BiNbO4-based triclinic. The series where niobium is substituted by tungsten on B site reveals phase-modulated structure. The values of cell parameters decrease with increasing the dopant concentration for all samples except the tungsten series although the latter show higher total conductivity.

• Keywords:
• Impedance spectroscopy
• LaNbO4
• lanthanum ortho-niobates.