I MSEP Co.

Kyoto, Japan

I MSEP Co.

Kyoto, Japan

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Patent
Toyota Boshoku, The Doshisha, SEC CARBON Ltd and Imsep Co. | Date: 2010-05-28

Dense carbon films are deposited on a conductive substrate by placing the substrate acting as anode in a molten salt electrolyte bath containing a source of carbide ion and applying DC current across the substrate and a counter electrode acting as cathode also placed in the molten salt electrolyte bath. The carbide ions are electrochemically oxidized to deposit a carbon film on the surface of the substrate.


Patent
Toyota Boshoku, The Doshisha, SEC CARBON Ltd and Imsep Co. | Date: 2010-05-28

Dense carbon nitride films are electrochemically formed on a conductive substrate by placing the substrate acting as cathode in a molten salt electrolyte bath and applying DC current across the substrate and a counter electrode acting as anode also placed in the molten salt electrolyte bath. Carbonate ion and nitrate ion are concurrently reduced to deposit carbon nitride films on the substrate.


Patent
ROHM Semiconductor, The Doshisha and Imsep Co. | Date: 2011-08-03

To provide a method for forming a boron-containing thin film, by which a uniform boron thin film with good adhesion can be formed on the surface of a processing object, and also to provide a multilayer structure. An electrolysis apparatus includes an anode 1, a processing object 2 serving as a cathode, an electrolytic vessel 4, and a molten salt electrolytic bath 5. A variable power supply 6 is connected between the anode 1 and the processing object 2. The variable power supply 6 is configured to be capable of changing a voltage or current waveform during the electrolysis process. Current of an appropriate pulse waveform is applied in the molten salt for electrolysis to form a uniform boron thin film 3 within the processing object 2 having a complicated shape.


Tokushige M.,Doshisha University | Tsujimura H.,I MSEP Co. | Nishikiori T.,I MSEP Co. | Ito Y.,Doshisha University
Electrochimica Acta | Year: 2013

Silicon nanoparticles are formed from SiO2 particles by conducting plasma-induced cathodic discharge electrolysis. In a LiCl-KCl melt in which SiO2 particles were suspended at 450 °C, we obtained Si nanoparticles with diameters around 20 nm. During the electrolysis period, SiO2 particles are directly reduced by discharge electrons on the surface of the melt just under the discharge, and the deposited Si atom clusters form Si nanoparticles, which leave the surface of the original SiO2 particle due to free spaces caused by a molar volume difference between SiO 2 and Si. We also found that SiC nanoparticles can be obtained using carbon anode. Based on Faraday's law, the current efficiency for the formation of Si nanoparticles is 70%. © 2012 Elsevier Ltd.


Tokushige M.,Doshisha University | Nishikiori T.,IMSEP Co. | Ito Y.,Doshisha University
Russian Journal of Electrochemistry | Year: 2010

Nanoparticles of various elements such as Si, Al, and Zr were formed by plasma-induced cathodic discharge electrolysis in molten chloride electrolyte under a 1 atm Ar atmosphere. Al and Si nanoparticles with 100 nm diameters were obtained from an LiCl-KCl-CsCl melt at 300°C. Zr nanoparticles with diameters less than 50 nm were obtained from an LiCl-KCl at 450°C. Then with a newly designed and constructed "rotating disk anode type electrolytic cell", Ti nanoparticles with diameters less than 20 nm were obtained. Finally, to find more appropriate condition for obtaining finer and more uniform nanoparticles, the effects of the pulse conditions of the applied current and the rotating velocity of a disk anode on size and morphology among the obtained nanoparticles were investigated by choosing Ni nanoparticle formation as an example. The results showed that quick removal of the formed fine nanoparticles from the melt surface, where the discharge column is standing, is the most important factor to obtain smaller and more uniform nanoparticles. © Pleiades Publishing, Ltd., 2010.


Tokushige M.,Doshisha University | Matsuura A.,Doshisha University | Nishikiori T.,IMsep Company | Ito Y.,Doshisha University
Journal of the Electrochemical Society | Year: 2011

Co-Pt intermetallic compound nanoparticles were formed by plasma-induced cathodic discharge electrolysis in molten LiCl-KCl electrolytes at 400-500°C under 1 atm of Ar atmosphere. Two different approaches were adopted: the displacement reaction between an electrochemically formed Co nanoparticle and Pt(II), and the codeposition of Co and Pt. In both approaches, special attention was paid to controlling the intermetallic composition of the Co-Pt particle by the experimental condition. It was found that both the composition of the particle and its magnetic property were affected by the residence time of the nanoparticle formed in the melt after terminating the electrolysis. In the displacement reaction, the Pt-rich phase (Co Pt3) was predominantly formed at an early stage of the residence, which changed to a Co-rich phase (Co3 Pt) when the residence time became longer. The coercivity of the obtained particle was 54.1 kA m-1 at 400°C and was 64.9 kA m-1 at 500°C. In the case of the codeposition, the composition of the Co-Pt nanoparticle also changed from the Pt-rich phase to the Co-rich phase with the long residence time after terminating the electrolysis. The coercivity of the obtained particle showed a higher value (375 kA m-1) than that of the particle obtained by the displacement reaction. © 2010 The Electrochemical Society.


Tokushige M.,Doshisha University | Nishikiori T.,I MSEP Company Ltd | Ito Y.,Doshisha University
Journal of the Electrochemical Society | Year: 2010

Fine nanoparticles of Ni were formed in molten LiCl-KCl-CsCl electrolyte under 1 atm of Ar atmosphere by plasma-induced cathodic discharge electrolysis using the rotating disk anode-type electrolytic cell. The relations between the size of the formed nanoparticles and the electrolysis conditions, such as the rotation speed of the disk and the electrolysis current value, were investigated. Ni nanoparticles with diameters of less than 10 nm were obtained at a rotation speed higher than 2000 rpm. The size of the obtained Ni nanoparticles depends on the rotation speed of the disk but not on the electrolysis current value. Based on the obtained results, the particle growth process just under the discharge is discussed. © 2010 The Electrochemical Society.


Ito Y.,IMsep Co. | Nishikiori T.,IMsep Co. | Tsujimura H.,IMsep Co.
Faraday Discussions | Year: 2016

We have invented various novel molten salt electrochemical processes, that can be put to practical use in the fields of energy and materials. These processes are promising from both technological and commercial viewpoints, and they are currently under development for industrial application. To showcase current developments in work toward industrialization, we focus here on three of these processes: (1) electrolytic synthesis of ammonia from water and nitrogen under atmospheric pressure, (2) electrochemical formation of carbon film, and (3) plasma-induced discharge electrolysis to produce nanoparticles. © 2016 The Royal Society of Chemistry.


Patent
Imsep Co. | Date: 2011-10-18

Provided is a method for producing fine metal particles, wherein metal oxide powders can be used as a source of fine metal particles, and a method for producing fine metal particles can be provided avoiding the contamination of the molten salt electrolyte bath and the produced fine metal particles. A method for producing fine metal particles (112) is provided which comprises generating cathodic discharge outside and over the surface of an electrolyte bath (100) comprising metal oxide powders (110) suspended therein, whereby the metal oxide powders (110) are electrochemically reduced into the fine metal particles (112).


Patent
Imsep Co. | Date: 2013-09-27

The A liquid transport apparatus includes: a U-shaped vessel for storing the liquid; an inverse conically shaped body which is hollow and has an opening part of an upper end and an opening part of a lower end; and a rotating disk driving motor part for rotating the inverse conically shaped body on an axis extending along a substantially vertical direction. The opening part of the lower end of the inverse conically shaped body is immersed in the liquid stored in the U-shaped vessel. In the liquid transport apparatus, an overflow opening part for keeping constant a distance between the opening part of the lower end of the inverse conically shaped body and a surface of the liquid stored in the U-shaped vessel is formed.

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