Publications by authors named "M N Yashima"

Proton conductors have potential applications such as fuel cells, electrolysis cells, and sensors. These applications require new materials with high proton conductivity and high chemical stability at intermediate temperatures. Herein we report a series of new hexagonal perovskite-related oxides, BaAlSnO ( = Gd, Dy, Ho, Y, Er, Tm, and Yb).

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Oxide ion conductors are attractive materials because of their wide range of applications, such as solid oxide fuel cells. Oxide ion conduction in oxyhalides (compounds containing both oxide ions and halide ions) is rare. In the present work, we found that Sillén oxychlorides, BiTeLuOCl ( = 0, 0.

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A new sodium tellurate has been hydrothermally synthesized and comprehensively analysed using spectroscopic and thermogravimetric techniques, resulting in the determination of its composition as NaTeO(OH). The analysis of synchrotron X-ray and neutron diffraction data indicates that NaTeO(OH) has a crystal structure similar to that of the previously reported tellurate, KTeO(OH), with the space group 2/ (No. 14).

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Article Synopsis
  • The study successfully synthesized a new compound, γ-LiScCl, under high pressure, marking the first time this has been achieved for this family of ionic conductors.
  • Structural analysis revealed that γ-LiScCl exhibits a unique hexagonal close-packed (hcp) arrangement of anions, unlike its previously known cubic closed-packed (ccp) forms.
  • The research highlights that the ratio of cation to anion radii is crucial for determining the structural formation and that γ-LiScCl demonstrates enhanced electrochemical stability, suggesting potential advancements in the design of lithium solid electrolytes.
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Computer diagnosis of electrocardiograms is widely used to provide useful information in clinical practice and medical checkups. However, it is common for users to be confused by the inappropriate diagnosis. We illustrate some examples of inappropriate automatic diagnoses and discuss the actual situation of inappropriate automatic processing and its problems.

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