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Naoyuki Tatsumi,Yoshihito Maeda,Hiroshi Nozawa,Shin-ichi Tamai 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.46 No.1
We have investigated the structural changes of SrBi2Ta2O9 (SBT) and Bi3:75La0:25Ti3O12 (BLT)lms under a high temperature annealing process at 800 C in a vacuum (pressure = 103 Pa),which is an extreme annealing condition. An improvement in the crystalline orientation due to the coalescence of crystalline grains was conrmed. Raman studies revealed that the deciency of Bi3in the Bi oxide layer of SBT was caused by the annealing and occurred to a greater extent than inBLT. This dierence between SBT and BLT is discussed on the basis of the dierence in stabilitybetween (TaO6) and (TiO6) octahedrons.
Shibatani, Saori,Nakanishi, Motohiro,Mizuno, Nobumi,Mishima, Fumihito,Akiyama, Yoko,Okada, Hidehiko,Hirota, Noriyuki,Matsuura, Hideki,Maeda, Tatsumi,Shigemoto, Naoya,Nishijima, Shigehiro The Korea Institute of Applied Superconductivity a 2016 한국초전도저온공학회논문지 Vol.18 No.1
A Superconducting High Gradient Magnetic Separation (HGMS) system is proposed for treatment of feed-water in thermal power plant [1]. This is a method to remove the iron scale from feed-water utilizing magnetic force. One of the issues for practical use of HGMS system is to extend continuous operation period. In this study, we designed the magnetic filters by particle trajectory simulation and HGMS experiments in order to solve this problem. As a result, the quantity of magnetite captured by each filter was equalized and filter blockage was prevented. A design method of the magnetic filter was proposed which is suitable for the long-term continuous scale removal in the feed-water system of the thermal power plant.