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Occurrence of Dielectric 1:1:4 Compound in the Ternary System BaO—Ln 2 O 3 —TiO 2 (Ln = La, Nd, and Sm): II, Reexamination of Formation of Isostructural Ternary Compounds in Identical Systems
Author(s) -
Takahashi Junichi,
Ikegami Takashi,
Kageyama Keisuke
Publication year - 1991
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1991.tb07802.x
Subject(s) - isostructural , coprecipitation , ternary operation , electron microprobe , raman spectroscopy , analytical chemistry (journal) , calcination , solid solution , crystallography , ternary compound , materials science , ternary numeral system , powder diffraction , phase (matter) , chemistry , mineralogy , crystal structure , inorganic chemistry , metallurgy , programming language , physics , organic chemistry , computer science , optics , catalysis , biochemistry , chromatography
To establish the correct composition of a ternary compound having higher TiO 2 content in the BaO—Nd 2 O 3 —TiO 2 system, the phase change of samples with variable controlled compositions, which were prepared by a modified coprecipitation method, was examined by X‐ray diffractometry and Raman spectroscopy. Identification of the phases present in the calcined samples and microstructural evidence for the fired product from electron microprobe analysis clearly indicated that the ternary compound having the composition 1:1:4 occurs in the present system. X‐ray powder diffraction data of the isostructural 1:1:4 and 1:1:3 compounds in each identical ternary system (Ln = La, Nd, and Sm) were refined and indexed. Partial subsolidus phase relations consisting of different composition triangles were also proposed for the present ternary systems.