NDLI: Formation of Core-Shell Structure of BaTiO3 Grains in MLCC

Content Provider	IEEE Xplore Digital Library
Author	Chang-Hoon Kim Kum-Jin Park Yeo-Joo Yoon Jeong-Oh Hong Dong-Sook Sinn Kang-Heon Hur
Copyright Year	2007
Description	Author affiliation: Samsung Electro-Mech., Suwon (Chang-Hoon Kim; Kum-Jin Park; Jeong-Oh Hong; Dong-Sook Sinn)
Abstract	To understand the formation of core-shell structure in $BaTiO_{3}$ (BT) grains in multilayer ceramic capacitors, specimens were prepared with BT powders mixed with Y and Mg, and their microstructures were investigated in terms of scanning electron microscopy, x-ray diffractometry, and transmission electron microscopy. Compared to BT without Y and Mg, the addition of additives inhibited growth of the BT grains. Microstructural investigation showed that Y dissolved easily in BT lattice to a certain depth inside of the grain whereas Mg tended to stay at grain boundaries rather than to be incorporated into BT. It was considered that in case of Y and Mg addition in a proper ratio, Y could play a dominant role in the formation of shell leading to a slight dissolution of Mg in the shell. Next, the effects of ball-milling condition on the core-shell formation were studied. As the ball-milling period increased, the milled powders did not show a significant change in size distribution but an increase of residual strain which was attributed to the milling damage. The increase in milling damage facilitated the shell formation leading to the increased shell portion in the core-shell grain and, in turn, the deteriorating dielectric property.
Starting Page	543
Ending Page	546
File Size	2722037
Page Count	4
File Format	PDF
ISBN	9781424413331
ISSN	10994734
DOI	10.1109/ISAF.2007.4393324
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-05-27
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Powders Scanning electron microscopy Transmission electron microscopy Milling Nonhomogeneous media Ceramics Capacitors Microstructure X-ray diffraction Lattices
Content Type	Text
Resource Type	Article

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