Destruction phenomena in ferroactive materials

• Published in: Journal of advanced dielectrics 2020-08, Vol.10 (4), p.2050012-2050012-9
• Main Authors: Khasbulatov, Sidek, Cherpakov, Aleksander, Parinov, Ivan, Andryushin, Konstantin, Shilkina, Lidiya, Aleshin, Vladimir, Andryushina, Inna, Mardaliev, Balabek, Gordienko, David, Verbenko, Iliya, Reznichenko, Larisa
• Format: Article
• Language: English
• Subjects: Bismuth ferrite; Crystal structure; Destruction; Erbium; Grain structure; microstructure; multiferroics; Rare earth elements; Solid phase synthesis; Solid phases; Solid solutions; Structural members; structure; Ytterbium
• ISSN: 2010-135X; 2010-1368
• DOI: 10.1142/S2010135X20500125

The results of a comprehensive study of the crystal structure, grain structure, and strength properties of ceramic bismuth ferrite with rare earth elements (REE) obtained by two-stage solid-phase synthesis followed by sintering using conventional ceramic technology are presented. The reasons for the formation of low mechanical strength and the development of destruction phenomena in solid solutions with small REE ( R ̄ < 0 . 9 4 Å) are considered: Tb, Dy, Ho, Er, Tm, Yb, Lu. The causes of the observed phenomena associated with the composite-like structure of the studied media and, as a consequence, the occurrence of local stresses of structural elements that provoke crack formation are established. A source of the latter are also the structural features of the grain landscape. The conclusion is made about the appropriateness of taking into account the information obtained when developing devices based on BiFeO3/REE multiferroics.