Affiliation:
1. Changwon National University
2. Hanyang University
Abstract
In this study, shrinkage behavior and coefficient of thermal expansion (CTE) of novel
nickel (Ni) powder with an addition of dielectric material, BaTiO3, have been investigated to reduce
the large shrinkage mismatch between Ni electrode and dielectric material and to control the thermal
and/or residual stresses created by CTE mismatch in MLCCs (multilayer ceramic capacitors). For
which two kinds of Ni powders were used. The component of Ni powders is analyzed by XRF, and the
thermal behavior is measured by TG/DTA. The Ni and BaTiO3 powders were mixed with 9:1, 8:2,
and 7:3 volume ratios. The BaTiO3-added Ni green bodies were fabricated through cold isostatic
pressing, and then sintered to 1300°C in a reduction atmosphere. The shrinkage behavior with volume
ratio was checked during sintering from 700 to 1300°C with 300°C interval. The CTE was measured
in inert (argon) atmosphere with sintered samples. It is found that the shrinkage behavior and the CTE
of Ni electrode are dependent on the volume of BaTiO3 added. The particle size of Ni powder also
affects the microstructure and its sintering density, with less effect of its component.
Publisher
Trans Tech Publications, Ltd.
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Reference7 articles.
1. Y. Sakabe: Am. Ceram. Soc. Bull. Vol. 66 (1987), pp.1338-1341.
2. J. Yamanatsu, N. Kawano, T. Arashi, A. Sato, Y. Nakano and T. Nomura: J. Power Sources Vol. 60 (1996), pp.199-203.
3. Y. Mizuno, Y. Okino, N. Kohzu, H. Chazono and H. Kishi: Jpn, J. Appl. Phys, Vol. 37 (1998), pp.5227-5231.
4. R. Ueyama, T. Ueyama, K. Koumoto, T. Yamamoto and K. Kuribayashi J. Jpn. Soc. Powder Metall. Vol. 48 (2001), pp.392-396 (in Japanese).
5. B. Rawal, R. Ladew and R. Garcia: The 37th Electronic Component Conferences, Boston, MA, 1987, pp.145-156.
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