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Leaching Behavior of Nickel from Waste Multi-Layer Ceramic Capacitor  

Kim, Eun-Young (Department of Resources Recycling, University of Science & Technology)
Kim, Byung-Su (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources(KIGAM))
Kim, Min-Seuk (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources(KIGAM))
Jeong, Jin-Ki (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources(KIGAM))
Lee, Jae-Chun (Minerals & Materials Processing Division, Korea Institute of Geoscience & Mineral Resources(KIGAM))
Publication Information
Resources Recycling / v.14, no.5, 2005 , pp. 32-39 More about this Journal
Abstract
Leaching behavior of nickel contained in waste Multi-Layer Ceramic Capacitor (MLCC) was investigated using a batch reactor. The effects of acid type, acid concentration, leaching temperature, particle size, and reaction time on the extraction of nickel metal from waste MLCC were examined. As a result, 97% of nickel contained in waste MLCC was leached out in 30 min at the temperature of $90^{\circ}C$ under the condition of $HNO_3$ concentration 1N, solid/liquid ratio 5 g/L and particle size $-300/+180{\mu}m$. It was also found that a Jander equation was useful to fit well the leaching rate data. The rate of nickel leaching is controlled by pore diffusion in $BaTiO_3$ layer and has an activation energy of 37.6 kJ/mol (9.0 kcal/mol).
Keywords
Multi-Layer Ceramic Capacitor; Nickel; $HNO_3$; leaching; Jander equation;
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