Effect of Nb5+ ion substitution on the dielectric property of BaTi2O5–Ba6Ti17O40 eutectic prepared by a floating zone method

Ti4+ ions of the materials solidified from the BaTi2O5–Ba6Ti17O40 (BT2–B6T17) eutectic melt were substituted with 0–1.0 at% Nb5+ ions (CNb = 0–1.0 at%) by a floating zone method, and the effects of CNb on the microstructure, permittivity and Curie temperature of the BT2–B6T17 eutectics were studied....

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Bibliographic Details
Published inMaterials today : proceedings Vol. 16; pp. 191 - 195
Main Authors Shiga, Keiji, Wollstadt, Stephan, Katsui, Hirokazu, Goto, Takashi
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 2019
Subjects
BaTi2O5
Eutectic
Ferroelectric
Floating zone method
Ferroelectric
Floating zone method
BaTi2O5
Eutectic
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Summary:Ti4+ ions of the materials solidified from the BaTi2O5–Ba6Ti17O40 (BT2–B6T17) eutectic melt were substituted with 0–1.0 at% Nb5+ ions (CNb = 0–1.0 at%) by a floating zone method, and the effects of CNb on the microstructure, permittivity and Curie temperature of the BT2–B6T17 eutectics were studied. The BT2–B6T17 eutectics at CNb = 0–1.0 at% consisted of BaTi2O5 and Ba6Ti17O40. b- and a-axes of BaTi2O5 and Ba6Ti17O40, respectively, were parallel to the growth directions of the BT2–B6T17 eutectic. Ba6Ti17O40 in the BT2–B6T17 eutectic had the rod-like structure parallel to the growth direction in the matrix of BaTi2O5. As CNb increased from 0 to 1.0 at%, the permittivity at room temperature increased from 70 to 214 and the Curie temperature decreased from 748 to 679 K.
ISSN:2214-7853
2214-7853
DOI:10.1016/j.matpr.2019.05.290