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김기호(Kiho Kim) 한국표면공학회 2014 한국표면공학회지 Vol.47 No.1
Electric conductivities of LaCl₃-KCl binary melts have been measured by the Kohlausch bridge method over the range from their liquidus temperatures to about 1280 K. The electric conductivity increased with the content of KCl for all over the composition range of binary melts. The composition dependence of the electric conductivity and molar conductivity for the binary melt showed a non-linear relation from the additivity line, and the deviation showed a maximum value at about 60 mol.% KCl. The deviation implies the existence of complex ion of LaCl<SUP>4?</SUP> in the melt. Activation energy for electric conductivity of the binary melts decreased monotonously with increasing content of KCl.
김기호(Kiho Kim),송호영(Hoyoung Song),정충섭(Choongsub Jung),조강래(Kangrae Cho) 한국자동차공학회 2011 한국자동차공학회 부문종합 학술대회 Vol.2011 No.5
Particulate Matter from decrepit diesel vehicles has been magnified as social issues. The government legislated to improve air-environment as attaching diesel particulate filter to running diesel vehicles. But the number of diesel particulate filters early taken off on diesel vehicles has increased because of cancellation of vehicle registration as disuse or export. So the government amended relevant laws to recycle many filters early taken off on vehicles and to replace expired diesel particulate filters. In this study, we intend to draw a conclusion on correlation of PM and smoke from diesel particulate filters and to offer basic datum that enable to make a decision whether recycle unattached filter, for diesel particulate filter early taken off.
LaCl<SUB>3</SUB>- CsCl 2성분계 용융염의 점도
김기호(Kiho Kim) 한국표면공학회 2013 한국표면공학회지 Vol.46 No.2
Viscosities of LaCl3-CsCl binary melts were measured by the capillary method over the range of their liquidus temperatures to about 1200 K. The cell constant were determined by using pure water. The results obtained are summerized as follows: Viscosities of melted LaCl3 were decreased with the content of CsCl for all over the composition range of binary melts. Composition versus viscosity relation for the binary melt showed a non-linear relationship from the additivity line and the deviations showed a maximum value at about 60 mol% CsCl. This suggest the existence of the complex ion of LaCl4<SUP>?</SUP> in the melt. Activation energy for the viscous flow of the binary melts decreased monotonously with the increasing content of CsCl after a few increasement till 40 mol% CsCl. All of these results were the resemble with the viscosities of LaCl3<SUP>-</SUP> NaCl binary melts.
수은 음극 상 전착에 의한 니켈 아말감의 제조와 그 물성
김기호(Kiho Kim) 한국표면공학회 2005 한국표면공학회지 Vol.38 No.5
Nickel amalgam was prepared by the electro-deposition with mercury cathode in a modified Watts bath. Homogeneous nickel amalgam was obtained. The fluidity of the amalgam decreased gradually with increased nickel quantity and become solid finally. Nickel powders of sub-micron size were obtained by a distillation of mercury from the amalgam. The characterization of the nickel amalgam was studied by SEM and x-ray diffractometry.
태양전지 전력을 이용한 316L강의 전해연마 폐액 중 중금속 성분의 회수
김기호(Kiho Kim),장정목(Jungmok Jang) 한국표면공학회 2009 한국표면공학회지 Vol.42 No.1
Recovery of heavy-metallic component from a waste solution of factory was undertaken by the solar cell electricity. The solution was obtained from an electrolytic etching process of 316L stainless steel. The electrolysis of the solution for recovery of heavy metallic components was made with platinum plated titanium mesh anode and copper plate cathode. Analysis for the solution and electro-winned materials were made by EDS, XRD and SEM. Iron, chromium, and sulfur components were recovered on the cathode from the solution. Result of EDS analysis for the electro-winned materials revealed that some metal oxide were contained in the recovered material. The recovered materials were expected to have metallic form only by the electrolysis, but metal compounds were contained because of weak solar cell power. Nickel and manganese component in the solution doesn't recovered by this electrolysis process, but they made a sludge with phosphoric acid in the solution.