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건조일수에 따른 CSPE의 특성에 미치는 담수침지의 영향
강명균,이정훈,이승훈,전준수,박영,박기엽,정규원,신용덕,Kang, Myeong-Kyun,Lee, Jung-Hoon,Lee, Seung-Hoon,Jeon, Jun-Soo,Park, Young,Park, Ki-Yub,Jeong, Kyu-Won,Shin, Yong-Deok 한국전기전자재료학회 2013 전기전자재료학회논문지 Vol.26 No.8
The accelerated thermal aging of a CSPE were carried out for 0, 80.82, 161.63 days at $100^{\circ}C$, which are equal to 0, 40 and 80 years of aging at $50^{\circ}C$, respectively. The volume electrical resistivities of the seawater and freshwater flooding were measured through 3-terminal circuit diagram. The volume electrical resistivities of the 0y, 40y and 80y were $2.454{\times}10^{13}{\sim}1.377{\times}10^{14}{\Omega}{\cdot}cm$, $1.121{\times}10^{13}{\sim}7.529{\times}10^{13}{\Omega}{\cdot}cm$ and $1.284{\times}10^{13}{\sim}8.974{\times}10^{13}{\Omega}{\cdot}cm$ at room temperature, respectively. The dielectric constant of the 0y, 40y and 80y were 2.922~3.431, 2.613~3.285 and 2.921~3.332 at room temperature, respectively. It is certain that the ionic ($Na^+$, $Cl^-$, $Mg^{2+}$, ${SO_4}^{2-}$, $Ca^{2+}$, $K^+$) conduction current was formed by the salinity of the seawater. The volume electrical resistivity of the cleaned CSPE via freshwater trends slightly upward with the number of dried days at room temperature. As a result, the $CH_2$ component of thermally accelerated aged CSPE decreased after seawater and freshwater flooding for 5 days respectively, whereas the atoms such as Cl, O, Pb, Al, Si, Sb, S related with the conducting ion ($Na^+$, $Cl^-$, $Mg^{2+}$, ${SO_4}^{2-}$, $Ca^{2+}$, $K^+$) component increased relatively.
컴퓨터 시뮬레이션에 의한 SPS의 몰드크기에 따른 SiC-ZrB₂ 복합체의 소결특성 연구
신용덕(Yong-Deok Shin),이정훈(Jung Hoon Lee),진범수(Beom-Soo Jin),강명균(Myeong-Kyun Kang) 대한전기학회 2012 전기학회논문지 Vol.61 No.7
The computer simulation was performed to confirm distribution of current and power density according to inner diameter of graphite mold of SPS(Spark Plasma Sintering). When the inner diameters of a graphite mold are varied 10㎜Φ, 20㎜Φ, 30㎜Φ and 40㎜Φ, the more the inner diameter of graphite mold is decreased, the more the current density of punch section is increased. Because the electrical resistivity of the SiC-ZrB₂ specimen section(7.77×10?⁴ Ωㆍ㎝) was lower than the electrical resistivity(6.00×10?³ Ωㆍ㎝) of graphite section, the current density and power density of specimen section was higher than those of graphite section. It is considered that a SiC-ZrB₂ composite is sintered by more Joule heat of specimen section than that of mold and punch section. The current and power density distribution of a SiC-ZrB₂ composite can be predicted through computer simulation when SPS is conducted, and an electrical resistivity of the SiC-ZrB₂ composite is main element of SPS.