Faculty Profiles - OGAWA Jun

MISC - OGAWA Jun

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Evaluation of AC Loss Characteristics in HTS Coil by Numerical Analysis and Measurements Using Power Meter and Boil-off Methods

FUKUI Satoshi, SHIBAYAMA Makoto, OGAWA Jun, SATO Takao

2012 ( 1 ) 77 - 81 2012.6

超伝導バルク磁石を使った無電解ニッケルめっき廃液からのニッケルの回収

深澤晴信, 岡徹雄, 三村大樹, 福井聡, 小川純, 佐藤孝雄, 大泉学, 横山和哉, 辻村盛夫, 寺澤俊久

電気学会全国大会講演論文集 2012 ( 5 ) 159 2012.3

高温超伝導バルク磁石の静磁場を用いた希土類永久磁石への着磁実験及び数値解析

川崎信隆, 上原翔, 福井聡, 小川純, 佐藤孝雄, 岡徹雄, 寺沢俊久, 伊藤佳孝, 横山和哉

電気学会全国大会講演論文集 2012 ( 5 ) 156 2012.3

Magnetic Separation of Nickel from Electroless Plating Waste Fluid using a HTS Bulk Magnet

OKA Tetsuo, KIMURA Takafumi, MIMURA Daiki, FUKAZAWA Harunobu, FUKUI Satoshi, OGAWA Jun, SATO Takao, OOIZUMI Manabu, TERASAWA Toshihisa, TSUJIMURA Morio, YOKOYAMA Kazuya

TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) 46 ( 11 ) 655 - 660 2011.11

Language：Japanese Publisher：CRYOGENICS AND SUPERCONDUCTIVITY SOCIETY OF JAPAN

A magnetic separation experiment to recycle nickel from the waste fluid of electroless plating processes was conducted using the open-gradient magnetic separation technique and a HTS bulk magnet system. A magnetic pole containing Gd123-based bulk superconductors was activated to 3.44 T at 34.9 K using a 5 T superconducting solenoid and the field cooling method. The coarse precipitates of nickel sulfate are composed of phosphite ions, which are yielded during the plating reaction by controlling the temperature and pH. Next, the open-gradient magnetic separation technique was employed, with use of water channels to separate the nickel-sulfate crystals from the mixture of the nickel sulfate and phosphite compounds based on the difference in magnetic properties. From the concentrations of each precipitate attracted to the magnetic pole, we succeeded in collecting nickel-sulfate crystals preferentially to the phosphite ions soon after crystal growth began.

DOI： 10.2221/jcsj.46.655

Dy123系超伝導バルク磁石のパルス着磁における磁場侵入挙動

石塚大地, 大塚智文, 小川純, 福井聡, 佐藤孝雄, 岡徹雄, 横山和哉, 村上明

低温工学・超電導学会講演概要集 85th 189 2011.11

22nd International Conference on Magnet Technology [MT-22]

野村新一, 高橋良和, 辺見努, 濱田一弥, 今川信作, 荻津透, 小黒英俊, 柁川一弘, 植田浩史, 中村武恒, 富田優, 三島史人, 岡徹雄, 小川純, 竹内孝夫, 東川甲平

Journal of the Cryogenics and Superconductivity Society of Japan 46 ( 10 ) 592 - 601 2011.10

高温超電導バルク磁石を用いた希土類磁石への着磁に関する数値解析

川崎信隆, 小川純, 福井聡, 佐藤孝雄, 岡徹雄, 伊藤佳孝, 寺沢俊久

低温工学・超電導学会講演概要集 84th 28 2011.5

スターリング冷凍機の高効率化に関する研究

大塚智文, 小林亮介, 小川純, 福井聡, 佐藤孝雄, 三ツ橋翔, 岡徹雄

低温工学・超電導学会講演概要集 84th 169 2011.5

Dy系高温超伝導バルク磁石のパルス着磁特性と捕捉磁場性能

岡徹雄, 関啓孝, 石塚大地, 小川純, 福井聡, 佐藤孝雄, 横山和哉, 村上明

低温工学・超電導学会講演概要集 84th 116 2011.5

Magnetizing of Permanent Magnet Using HTS Bulk Magnet

OKA Tetsuo, MURAYA Tomoki, KAWASAKI Nobutaka, FUKUI Satoshi, OGAWA Jun, SATO Takao, TERASAWA Toshihisa

TEION KOGAKU (Journal of Cryogenics and Superconductivity Society of Japan) 46 ( 3 ) 111 - 117 2011.3

Language：Japanese Publisher：CRYOGENICS AND SUPERCONDUCTIVITY SOCIETY OF JAPAN

A demagnetized Nd-Fe-B permanent magnet was scanned just above the magnetic pole containing the HTS bulk magnet, generating a magnetic field of 3.27 T. The magnet sample was subsequently found to be fully magnetized in the open space of the static magnetic fields. We examined the magnetic field distributions when the magnetic poles were scanned twice to activate the magnetic plates inversely with various overlap distances between the tracks of the HTS bulk magnet. The magnetic field of the "rewritten" magnet reached the values of the magnetically saturated region of the material, showing steep gradients at the border of each magnetic pole. As a replacement for conventional pulse field magnetizing methods, this technique is proposed to expand the degree of freedom in the design of electromagnetic devices, and is proposed as a novel practical method for magnetizing rare-earth magnets, which have excellent magnetic performance and require intense fields of more than 3 T to be activated.

DOI： 10.2221/jcsj.46.111

超伝導バルク磁石を使ったメッキ廃液からのNi沈殿の磁気分離

岡徹雄, 木村貴史, 三村大樹, 福井聡, 小川純, 佐藤孝雄, 大泉学, 小野恭史, 横山和哉, 辻村盛夫, 寺澤俊久

電気学会全国大会講演論文集 2011 ( 2 ) 189 2011.3