Open AccessMicrostructure features of the BST/(Mg, Ln)-ceramic
Author(s) -
K. P. Andryushin,
А. В. Нагаенко,
С. В. Хасбулатов,
Л. А. Шилкина,
Е. В. Глазунова,
С. И. Дудкина,
I. N. Andryushina,
Л. А. Резниченко
Publication year - 2021
Publication title -
journal of advanced dielectrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.38
H-Index - 13
eISSN - 2010-135X
pISSN - 2010-1368
DOI - 10.1142/s2010135x21600055
Subject(s) - ceramic , microstructure , grain size , materials science , crystallite , rare earth , sintering , dopant , lanthanide , solid solution , crystallography , physics , analytical chemistry (journal) , combinatorics , mineralogy , doping , composite material , mathematics , ion , metallurgy , chemistry , quantum mechanics , chromatography , optoelectronics
Solid solutions of the composition Ba[Formula: see text](Mg, Ln)[Formula: see text][Formula: see text]TiO 3 ([Formula: see text] = 0.01; 0.025; 0.04; [Formula: see text] = 0.20; 0.50; 0.80; Ln = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tu, Yb) were prepared by two-stage solid-phase synthesis followed by sintering using conventional ceramic technology. The influence of rare-earth elements on the microstructure of the prepared ceramic samples was investigated. It was found that regardless of the type of modifiers introduced, the grain landscape of the studied solid solutions with different amounts of SrTiO 3 is refined (in the initial system, the average grain size, [Formula: see text], at [Formula: see text] = 0.20 is 6 [Formula: see text]m; at [Formula: see text] = 0.50 is 4 [Formula: see text]m; at [Formula: see text] = 0.80 is 18 [Formula: see text]m) to crystallite sizes not exceeding (2-3) [Formula: see text]m, and compacted. The using of mechanical activation procedures leads to an even greater decrease in the size and an increase in the density of ceramics. The increasing in the concentration of modifiers in each group (within the considered range of dopant variation) against the background of such a fine-grained structure has little effect on the dynamics of changes in [Formula: see text]. It is concluded that it is advisable to use the data obtained in the development of functional materials based on BST/(Mg, Ln) and devices with the participation of these compositions.