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Effects of Substitutions of Titanium(IV) Ions by Iron(III) and Niobium(V) Ions on Phase Formation in Lanthanide-Containing Systems Comprising Layered Bismuth Titanate Ferrite
Russian Journal of Inorganic Chemistry ( IF 2.1 ) Pub Date : 2020-11-17 , DOI: 10.1134/s0036023620110133
A. V. Mitrofanova , E. A. Fortal’nova , M. G. Safronenko , E. D. Politova , A. V. Mosunov , N. U. Venskovskii

Abstract

Phase formation in the series of Bi3Nd2Fe1 + yTi3 – 2yNbyO15 and Bi3Tb2Fe1 + yTi3 – 2yNbyO15 (y = 0.0–0.6 and Δy = 0.2) samples is studied. When Bi3Nd2Fe1 + yTi3 – 2yNbyO15 solid solutions (ss) are doped with niobium(V) ions, the formation of Bi3Nd2FeTi3O15 layered perovskite, a member of the Aurivillius phase family of general formula Am – 1Bi2BmO3m + 3 (m = 4), is not dominant in samples where y ≥ 0.2. Bi4Ti3O12 (m = 3) and NdFeO3 phases are formed in the course of phase interaction under the chosen conditions. With higher niobium(V) amounts, a Bi2Ti2O7-base pyrochlore ss phase is formed in the Bi3Tb2Fe1 + yTi3 – 2yNbyO15 multicomponent system. Dielectric spectroscopy shows that the phases in samples of both series where y > 0.0 undergo structural alterations associated with magnetic and electric ordering.



中文翻译:

铁(III)和铌(V)离子取代钛(IV)离子对包含层状钛酸铋铁氧体的镧系元素体系中相形成的影响

摘要

Bi 3 Nd 2 Fe 1 +  y Ti 3 – 2 y Nb y O 15和Bi 3 Tb 2 Fe 1 +  y Ti 3 – 2 y Nb y O 15y = 0.0–0.6和Δy = 0.2)研究样本。当Bi 3 Nd 2 Fe 1 +  y Ti 3 – 2 y Nb y O 15固溶体(ss)掺入铌(V)离子时,会形成Bi3的Nd 2 FETI 3 ö 15层状钙钛矿,所述Aurivillius相族的通式A的一个成员 - 1的Bi 2直径:3 + 3= 4),不占优势样品,其中ý ≥0.2。在所选条件下的相变过程中会形成Bi 4 Ti 3 O 12m  = 3)和NdFeO 3相。铌(V)含量较高时,Bi 2 Ti 2 O 7Bi 3 Tb 2 Fe 1 +  y Ti 3 – 2 y Nb y O 15多组分体系中形成碱式烧绿石ss相。介电谱表明,y > 0.0的两个系列样品中的相都经历了与磁和电有序相关的结构变化。

更新日期:2020-11-17
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