Crystal structure and ferroelectric properties of Ca(Cu3−xMx)Ti4O12 (M=Fe and Ni) ceramics

Autor:	Akinori Kan, Tohru Moriyama, Hirotaka Ogawa
Rok vydání:	2013
Předmět:	Materials science Mechanical Engineering Mineralogy Crystal structure Condensed Matter Physics Ferroelectricity Crystallography Octahedron Mechanics of Materials visual_art Lattice (order) visual_art.visual_art_medium General Materials Science Ceramic Solubility Single phase
Zdroj:	Materials Science and Engineering: B. 178:875-880
ISSN:	0921-5107
DOI:	10.1016/j.mseb.2013.01.023
Popis:	M-substituted Ca(Cu3−xMx)Ti4O12 (CCMTO) ceramics, where M = Fe and Ni, were synthesized and the influence of M substitutions for Cu on the crystal structure and ferroelectric properties of CCMTO ceramics were investigated in this study. From the variations in the lattice parameters of CCMTO ceramics, the solubility limit of Ni substitution for Cu in CaCu3−xNixTi4O12 (CCNTO) ceramics was x = 0.2, whereas that of CaCu3−xFexTi4O12 (CCFTO) ceramics was x = 0.05. The crystal structural analysis of CCMTO ceramics revealed that the single phase of CCMTO ceramics belongs to the I23 non-centrosymmetric space group of I23; as a result, the Pr and Ec values of CCFTO ceramics at x = 0.05 were 1.8 μC/cm2 and 40 kV/cm, respectively. The ferroelectric behavior of CCMTO ceramics by the M substitutions for Cu may be related to the displacement of a Ti4+ cation in the TiO6 octahedra and tilting of the Ti–O–Ti angle because of the non-centrosymmetric space group.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::76f42b603a46972f8d2cefd61b02eb20 https://doi.org/10.1016/j.mseb.2013.01.023 Zobrazit plný text záznamu Full Text from ScienceDirect