多核錯体Nd[Fe_<0.5>Co_<0.5>(CN)_6]・4H_2Oの熱分解により作製されたNdFe_<0.5>Co_<0.5>O_3酸化物の性質

概要

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NdFe_<0.5>Co_<0.5>O_3, a trimetallic perovskite-type oxide, was prepared by thermal decomposition of a synthesized heteronuclear complex of Nd[Fe_<0.5>Co_<0.5>(CN)_6]・4H_2O. Using XRD, the perovskite-type phase was detected in the sample heated at 500℃ and the complex was completely decomposed to NdFe_<0.5>Co_<0.5>O_3 at 700℃. Distribution of the elements Nd, Fe, and Co on the surface of the complex that decomposed at 800℃ were homogeneous according to Auger electron spectroscopy(AES) analysis. For a solid-state reaction method using a mixture of single oxides(Nd_2O_3, Fe_2O_3 and CoO), a high heating temperature(>1000℃)is needed to form a single phase of the perovskite-type oxide. Fe-rich and Co-rich regions on the surface were clearly detected even in a mixture calcined at 1100℃. Surface concentration and structure of samples obtained by both methods were investigated by X-ray photoelectron spectroscopy(XPS). For both samples, XPS revealed that the(Fe+Co)/Nd ratio was less than unity.
社団法人日本セラミックス協会の論文
1998-10-01