Daido Bunseki Research Inc.

Nagoya, Japan

Daido Bunseki Research Inc.

Nagoya, Japan
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Nagasaka T.,Japan National Institute for Fusion Science | Tanaka T.,Japan National Institute for Fusion Science | Sagara A.,Japan National Institute for Fusion Science | Muroga T.,Japan National Institute for Fusion Science | And 6 more authors.
Plasma and Fusion Research | Year: 2012

Hydrogen recovery unit is developed for the molten salt loop Orosh2i-1. Pure Ni was selected as hydrogen permeation material due to its industrial maturity of fabrication technology and good compatibility with molten salt in fusion reactor condition. No significant degradation of hydrogen permeability of the pure Ni during the fabrication process. Advanced hydrogen permeation materials, such as Pd, V, Nb, and Ta, maintaining higher hydrogen permeability are also discussed to develop more compact hydrogen recovery systems. © 2012 The Japan Society of Plasma Science and Nuclear Fusion Research.

Tanaka K.,Daido Bunseki Research Inc. | Kato S.,Diado 2 Steel Co. | Kitaura M.,Daido Bunseki Research Inc. | Ueda K.,Toyota Technological Institute
Materials Transactions | Year: 2010

The two-dimensional distribution of hydrogen on Ti-6A1-4V gives very important information on the environmental embrittlement mechanism. The scanning-electron-stimulated desorption ion microscope, the so-called hydrogen microscope, can be used to visualize hydrogen on solid surfaces. In this study, we attempt to visualize hydrogen on Ti-6A1-4V alloy using a hydrogen microscope. As a result, the hydrogen distribution on the Ti-6A surface was clearly observed.© 2010 The Japan Institute of Metals .

Suzuki S.,Toyota Technological Institute | Kiyosumi K.,Toyota Technological Institute | Nagamori T.,Toyota Technological Institute | Tanaka K.,Daido Bunseki Research Inc. | Yoshimura M.,Toyota Technological Institute
e-Journal of Surface Science and Nanotechnology | Year: 2015

Chemical vapor deposition (CVD) is a promising method to produce large-size single-crystal graphene, and further increase in domain size is desirable for electro/optic applications. Here we studied the effect of low amount of air introduction by intentional leak on graphene growth in atmospheric pressure CVD. The air introduction at the heating process resulted in roughening of Cu surface induced by oxygen, while air introduction at the annealing under H2 ambient drastically decreased graphene density due to reduction of active sites for graphene nucleation both by surface oxidation and enlargement of Cu domain. Although air introduction only at the growth stage was ineffective for graphene nucleation, air introduction for both annealing and growth provided great enhancement of domain growth without increasing the density of graphene, which is an optimized condition to obtain a large single-crystal. This controlled introduction of air in atmospheric pressure CVD provided ∼ 2.5 mm hexagonal single layer graphene with high quality. © 2015 The Surface Science Society of Japan.

Tanaka K.,Daido Bunseki Research Inc. | Narita M.,Daido Bunseki Research Inc. | Watanabe K.,Daido Bunseki Research Inc.
Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan | Year: 2014

Quantitative analysis of free-lime (CaO) in the slag by X-ray diffraction (XRD) method was considered experimentally. CaO included in the slag was not pure CaO because X-ray diffraction peaks of CaO in the slag shifted from that of reagent CaO. The standard addition method was applied for quantitative analysis by XRD. In order to evaluate suitability, quantitative values obtained from XRD were compared with chemical analysis values obtained from ethylene glycol extraction method. Both values showed good relation. It was proved that a linear relation between XRD values and chemical analysis values by Pearson product-moment correlation coefficient.

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