Effects of La content on the densification, microstructure, and conductivity of doped La_10−xGe₆O_26±δ electrolytes

Abstract

In this study, the influence of La content on the characteristics of Nb‐, Mo‐, and W‐doped LaxGe6O26±δ electrolytes was investigated through sintering study, X‐ray diffraction, scanning electron microscopy, and conductivity measurement. The densification of LaxGe5.5Nb0.5O26±δ and LaxGe5.5W0.5O26±δ was retarded as the x reached 9.75, while that of LaxGe5.5Mo0.5O26±δ improved with increasing La content. The average grain size slightly increased and weight loss due to evaporation of GeO2 significantly reduced with increasing La content, ranging from 1.39% to 0.26%. Among the systems studied, La9.33Ge5.5Nb0.5O26.245, La9.33Ge5.5Mo0.5O26.045, and La9.50Ge5.5W0.5O26.75 electrolytes revealed great potential for use in SOFC applications.

Evaluation of electrodeposited Mn‐Co protective coatings on Crofer 22 APU steel

“…Different deposition methods result in different microstructures and often require an additional processing step for debinding or sintering. For large scale interconnects with complex shape, electrodeposition seems an interesting route, as it results in metallic coatings that can be converted into their respective oxides forming dense coatings at relatively low temperatures …”