An activated carbon with high micro and mesoporosity, as well as a high bulk density, was fabricated by activating the extrusion-molded precursor made from carbonized rice husk (RH) and beet sugar (BS) at 850℃ in CO_2. The pore structure of this RH-based activated carbon (RHAC) was analyzed in relation to the bulk density. The extrusion molding and the use of BS syrup were useful to attain those superior properties. RHAC which was first activated for 1 h was immersed again in the BS syrup and then activated in CO_2 for 2 h. This two-step activation process provided both a high bulk density (0.93 g/cm^3) and a highly textured structure (micropore volume: 0.29 cm^3/g, mesopore volume:0.19 cm^3/g, BET specific surface area: 844 m^2/g).
1 0 0 0 OA 磁気駆動アークによる鋼材熱処理装置の開発
- 著者
- 秋保 良太 杉本 尚哉 武田 紘一 野口 洋介 三浦 得太郎
- 出版者
- 一般社団法人 日本機械学会
- 雑誌
- 日本機械学会論文集C編 (ISSN:18848354)
- 巻号頁・発行日
- vol.79, no.806, pp.3979-3992, 2013 (Released:2013-10-25)
- 参考文献数
- 11
- 被引用文献数
- 2 2
Transferred arc oscillates in an alternating magnetic field imposed perpendicularly to the arc. The amplitude of oscillatory arc motion can be varied easily by adjusting the magnetic flux density. The heat flux distribution can be controlled by changing the wave form of the magnetic field. Using such magnetically driven arc, the authors developed a novel heat treatment system which consisted of a device for the generation of DC arc, that for the formation of various types of magnetic field, a mechanism for travelling the work piece and water circuit for quenching the heated material. Heat treatments for the steel material of S45C were performed using different wave forms of the magnetic field. The magnetically driven arc was able to produce various patterns of drawing on the steel surface such as a single belt with broad width, two parallel straight lines with different spacing, a series of diamond form and two parallel wavy lines. It was confirmed that Vickers hardness increased more than three times after the heat treatment.