SrSmAlO4 microwave dielectric ceramics were modified by Sr/Ti cosubstitution for Sm/Al. The effects of radius difference of A-site ions on the microwave dielectric characteristics were investigated together with the structure. Sr1 xSm1 xAl1 xTi xO4 ( x=0, ...
As Pm3+is a radioactive element and cannot be used for electrolyte applications, a co-doping scheme with Sm3+and Nd3+as co-dopants was suggested. The hypothesis was experimentally tested by keeping the molar ratio 1:1 between the co-dopants such that an average effective ionic radius is ...
The Ba2RE2Si4O13 series is further subdivided into two polymorphs, also showing a dependence on rare earth ionic radius (space group for La3+-Nd3+, and space group C2/ c for Sm3+-Ho3+). Two of the structure types identified are based on dinuclear rare earth units that differ in ...
SrSmAlO4 microwave dielectric ceramics were modified by Sr/Ti cosubstitution for Sm/Al. The effects of radius difference of A-site ions on the microwave dielectric characteristics were investigated together with the structure. Sr1+xSm1xAl1xTixO4 (x=0, 0.05, 0.10, and 0.15) ceramics were ...
The choice of strategy affects the variation in oxygen vacancy concentration, [VO], and average cation radius. Initial studies by Lane et al. [10] and Kim et al. [12] considered strontium co-doping as a method to reduce the deleterious effects of silicon impurities on the conductivity of ...
For aliovalently doped ceria, the ionic radius of the dopant is widely found to be one of the most important factors in determining ionic conductivity, with ionic conductivity passing through a maximum value at the optimal value. This optimal value is linked to the theoretical value, rc, ...