Wang X.,Kyoto University |
Orikasa Y.,Kyoto University |
Takesue Y.,Chiba University |
Inoue H.,Ishifuku Metal Industry Co. |
And 4 more authors.
Journal of the American Chemical Society | Year: 2013
Lattice strain of Pt-based catalysts reflecting d-band status is the decisive factor of their catalytic activity toward oxygen reduction reaction (ORR). For the newly arisen monolayer Pt system, however, no general strategy to isolate the lattice strain has been achieved due to the short-range ordering structure of monolayer Pt shells on different facets of core nanoparticles. Herein, based on the extended X-ray absorption fine structure of monolayer Pt atoms on various single crystal facets, we propose an effective methodology for evaluating the lattice strain of monolayer Pt shells on core nanoparticles. The quantitative lattice strain establishes a direct correlation to monolayer Pt shell ORR activity. © 2013 American Chemical Society. Source
ISHIFUKU Metal Industry Co. and Denso Corporation | Date: 2013-09-30
A spark plug for use in an internal combustion engine has a center electrode, an earth electrode, and an electrode chip formed on at least one of the center electrode and the earth electrode. A spark discharge gap is formed between the center electrode and the earth electrode. The electrode chip has a base section, a chromium rich layer formed on at least a part of the base section, and a diffusion layer formed between the base section and the chromium rich layer. The base section contains chromium within a range of 5 to 45 mass %, an element X within a range of 0.5 to 25 mass %, and a remainder composed of tungsten and unavoidable impurity. The chromium rich layer is larger in content of chromium than the base section. The element X contained in the base section is comprised of at least one of molybdenum, silicon, aluminum and lead.
Uemoto M.,Tokyo Institute of Technology |
Kobayashi T.,Japan National Institute of Materials Science |
Sasaki Y.,Ishifuku Metal Industry Co. |
Shimada K.,Ishifuku Metal Industry Co. |
And 4 more authors.
Analytical Methods | Year: 2011
A collaborative determination of the major components of silver brazing filler metals (Ag-Cu-Zn-Cd, Ag-Cu-Zn-Ni, and Ag-Cu-Zn-Sn alloys) by inductively coupled plasma atomic emission spectrometry (ICP-AES) was conducted. The classical wet methods of gravimetry and titrimetry were also investigated for comparison, most of which are provided by Japanese Industrial Standards (JIS). Results of instrumental and classical analyses using a simple dissolution procedure with nitric acid showed excellent trueness and precision amongst all laboratories and for all alloys except those containing tin. The tin-containing alloy had to be dissolved, suppressing precipitation of the sparingly soluble hydrous tin(iv) oxide. Dissolution with mixtures of nitric and sulfuric acid gave the most satisfactory results without precipitation, thus enabling an accurate determination that favourably compared to the classical wet results. Finally we have evaluated the ICP-AES method and a hybrid method with gravimetry and ICP-AES according to the precision required, and found them to be suitable for standardization. © 2011 The Royal Society of Chemistry. Source
Ishifuku Metal Industry Co. and Denso Corporation | Date: 2013-08-19
A spark plug has a center electrode and an earth electrode. The center electrode is faced to the earth electrode so that a spark discharging gap is formed between the center electrode and the earth electrode. An electrode chip is formed on at least one of the center electrode and the earth electrode. The electrode chip has a composition comprised of 40 to 60 mol % of aluminum and iridium as a remainder thereof. In the composition of the electrode chip, it is possible to replace part of the iridium with 1 to 20 mol % of at least one metal selected from nickel, iron, cobalt, platinum and rhodium.
Ishifuku Metal Industry Co. | Date: 2012-12-03
This invention provides sputtering target materials having high reflectance and excellent heat resistance, which are formed of Ag base alloys formed by adding a specific, minor amount of P to Ag and alloying them.