著者
梅田 純子 高田 龍一 道浦 吉貞 近藤 勝義
出版者
一般社団法人 スマートプロセス学会 (旧高温学会)
雑誌
スマートプロセス学会誌 (ISSN:2186702X)
巻号頁・発行日
vol.3, no.5, pp.323-327, 2014-09-20 (Released:2015-08-01)
参考文献数
5
被引用文献数
2

Rice husks, one of the typical agricultural wastes, consist with 70-75 mass% of organics and 15-20 mass% of amorphous silica. Silica can be obtained by combusting rice husks in air. However, silica purity is reduced by metallic impurities contained in rice husks. To extract high-purity amorphous silica from rice husks, the citric acid leaching process was developed to remove the metallic impurities from rice husks. By optimizing the citric acid solution concentration and combustion temperature of rice husks, completely amorphous silica ashes with 99.5 mass% were obtained. To establish the large-scale equipment to produce high purity amorphous rice husk silica, the process parameters in the citric acid leaching and air combustion were optimized. There was no significant difference of silica purity and the impurity contents of rice husk ashes by using between small-scale and large-scale equipment. Citric acid leached rice husk ashes were employed as the reinforcements of concrete materials. Compressive strength in use of high-purity amorphous silica revealed a higher value compared to the use of silica fume and raw rice husk ashes. The effect of citric acid leached rice husk ashes was high pozzolanic reactivity due to high-purity amorphous silica particles and the large surface area due to their porous structures.
著者
中島 英史
出版者
一般社団法人 スマートプロセス学会 (旧高温学会)
雑誌
スマートプロセス学会誌 (ISSN:2186702X)
巻号頁・発行日
vol.3, no.2, pp.108-114, 2014-03-20 (Released:2015-01-15)
参考文献数
16
被引用文献数
1 1
著者
稲垣 昌代 山西 弘城 若林 源一郎 芳原 新也 伊藤 哲夫 白坂 憲章 種坂 英次 古川 道郎
出版者
一般社団法人 スマートプロセス学会 (旧高温学会)
雑誌
スマートプロセス学会誌 (ISSN:2186702X)
巻号頁・発行日
vol.4, no.6, pp.275-279, 2015-11-20 (Released:2016-08-31)
参考文献数
8
被引用文献数
1

Large amount of radioactive cesium was emitted from the TEPCO Fukushima Dai-ichi nuclear power plant by the accident into atmospheric air, and a part of the radioactivity was brought to the ground by rain and snowfall. The Yamakiya district in Kawamata-machi, Fukushima is specified as the prepared evacuation zone. The authors collected wild mushrooms in this district as samples in 2012, 2013 and 2014. The concentration of radioactive cesium was measured by means of the hyperpure germanium semiconductor detector. The concentrations were ranged from 35 to 600,000 Bq/kg, and were different with points of sampling and kinds. The transfer coefficient of radioactive cesium to most wild mushrooms are lower than 0.5, although some mushroom species concentrate environmental radioactive cesium more than twice.
著者
上村 泰紀 清水 浩三 作山 誠樹
出版者
一般社団法人 スマートプロセス学会 (旧高温学会)
雑誌
スマートプロセス学会誌 (ISSN:2186702X)
巻号頁・発行日
vol.4, no.4, pp.172-178, 2015-07-20 (Released:2016-05-23)
参考文献数
11
被引用文献数
1

In this study, effect of Ag addition on microstructure of In-48 wt%Sn solder was investigated to improve mechanical properties. The microstructure of In-Sn-Ag solder was formed by β phase, γ phase and two different intermetallic compounds (IMCs) which are Ag2In and AgIn2. Ag2In in In-Sn-Ag solder improves the mechanical strength but deteriorates the ductility. However, AgIn2 enhances the ductility but decreases the mechanical strength. To improve the both mechanical strength and ductility, control of the amount of Ag2In and AgIn2 was found to be important, and 3 wt% Ag addition was found to improve both mechanical strength and ductility of In-48 wt%Sn solder.
著者
瀬渡 賢 青木 篤人 田代 真一 田中 学
出版者
一般社団法人 スマートプロセス学会 (旧高温学会)
雑誌
スマートプロセス学会誌 (ISSN:2186702X)
巻号頁・発行日
vol.6, no.1, pp.28-32, 2017
被引用文献数
4

In order to perform stable pure argon MIG welding, duplex current feeding MIG welding has been developed. In the previous experimental study, higher droplet temperature and deeper weld penetration were obtained in the duplex current feeding MIG welding compared with those of the conventional MIG welding. However, the similar effects are considered to be realized also by the conventional MIG welding with short wire extension through increase in welding current. In this paper, basic characteristics of the duplex current feeding MIG welding were compared with those of the conventional MIG welding with the short wire extension. Consequently, it was found that the duplex current feeding MIG welding achieved the deeper weld penetration without an undercut unlike in the case of the conventional MIG welding with the short wire extension.
著者
村田 博敏 土中 夏樹 水野 諭 サンチェス エドムンドJr. 難波 邦彦 井田 民男
出版者
一般社団法人 スマートプロセス学会 (旧高温学会)
雑誌
スマートプロセス学会誌 (ISSN:2186702X)
巻号頁・発行日
vol.3, no.5, pp.276-282, 2014-09-20 (Released:2015-08-01)
参考文献数
8
被引用文献数
4 10

In recent years, the development of bio-energy in cooperation with an ASEAN country is a very important issue for both participating countries, which would be able to build a win-win relationship. ASEAN countries have a large amount of unused biomass resources. However, raw biomass business does not seem to work well based on experience unless a new technology is introduced. The Bio-coke (referred to as BIC) is a domestic energy technology in Japan. In this study, Bio-coke made from unused resources of fruits that are imported in large quantities from ASEAN countries is being focused. The compressive strength measured for Banana peel Bio-coke was 98.4 MPa at initial moisture of 1.81 mass% while the Orange peel Bio-coke measured 167.0 MPa at initial moisture of 0.52 mass%. Meanwhile, the apparent Yang's modulus ratio based on cool compressive test for the former is about 4.0 GPa and 4.5GPa for the latter. Through hot compressive test at 973 K, 8 MPa was recorded for Banana peel Bio-coke and about 4.2 MPa for Orange peel Bio-coke.