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http://dx.doi.org/10.4191/KCERS.2009.46.2.131

The Effect of Uni-nanoadditive Manufactured Using RF Plasma Processing on Core-shell Structure in MLCC  

Song, Soon-Mo (LCR Materials Development Group, Samsung Electro-mechanics)
Kim, Hyo-Sub (LCR Materials Development Group, Samsung Electro-mechanics)
Park, Kum-Jin (LCR Materials Development Group, Samsung Electro-mechanics)
Sohn, Sung-Bum (LCR Materials Development Group, Samsung Electro-mechanics)
Kim, Young-Tae (LCR Materials Development Group, Samsung Electro-mechanics)
Hur, Kang-Heon (LCR Development Team, Samsung Electro-mechanics)
Publication Information
Journal of the Korean Ceramic Society / v.46, no.2, 2009 , pp. 131-136 More about this Journal
Abstract
Radio frequency (RF) plasma treatment is studied for the size reduction and the spheroidization of coarse particles to change them into nano-sized powders of spherical shape in MLCC fields. The uni-nanoadditives manufactured by RF plasma processing for high dispersion have been investigated for the effect on core-shell structure in dielectrics of MLCC. Microstructures have been characterized using scanning electron microscope (SEM), transmission electron microscope (TEM) and Electron Probe Micro Analyzer (EPMA). We compared the distribution of core-shell grains between specimens manufactured using uni-nanoadditive and using mixed additive. In addition, the uniformity of rare earth elements in the core-shell structured grains was analyzed. It was shown, from TEM observations, that the sintered specimen manufactured using uni-nanoadditives had more dense small grains with well-developed core-shell structure than the specimen using mixed additives, which had a homogeneous microstructure without abnormal grain growth and shows broad temperature coefficient of capacitance (TCC) curves in all temperature ranges because of well dispersed additives.
Keywords
MLCC; Core-shell structure; Uni-nanoadditive; RF plasma processing;
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