Insertion du lithium dans les oxydes de type A3M8O21: Les composes LiBa3M3Ti5O21

High εr and low loss microwave dielectric ceramics Ba3LiNb3−xTaxTi5O21

“…Recently, some ceramics in the BaOeTiO 2 eNb 2 O 5 /Ta 2 O 5 system such as BaTi 3 [12,13], and the introduction of Li into the composition could effectively lower the sintering temperature, then it is worthwhile to investigate whether Ba 3 LiM 3 Ti 5 O 21 (M ¼ Nb, Ta) ceramic might exhibit equivalent or superior properties. More recently, a series of Ba 3Àx Sr x LiM 3 Ti 5 O 21 (M ¼ Nb and Ta, x ¼ 0e3) ceramics have been reported by Dhanya et al [14].…”