Role of CuO-MOx in low-fire high dielectric ceramics for multilayer capacitors

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Abstract

CuO-based oxide mixtures were selected as sintering aid for (Ba,Ca)(Ti,Zr)O3 ceramics. Both microstructure and dielectric properties of were remarkably influenced by BaCO3-CuO flux type. With 1 wt% additive of BaCuO2-2.5CuO eutectic phase, (Ba,Ca)(Ti,Zr)O3 ceramics give high dielectric constant of 11000 and uniform grain size of 4 approx. 10 μm when sintered at 1130°C for 1 h. Different kinds of CuO-MOx mixtures were also used to investigate the role of MOx metal oxide in the grain growth and densification of CuO-added (Ba,Ca)(Ti,Zr)O3 ceramics. The eutectic temperature between CuO and MOx plays an important key in microstructure evolution. Both dielectric properties and microstructure can be further modified with doping secondary oxides.

Original languageEnglish
JournalFerroelectrics
Volume231
Issue number1 -4 pt 3
StatePublished - 1 Dec 1999
EventProceedings of the 1998 2nd Asian Meeting on Ferrroelectricity (AMF-2) - Singapore, Singapore
Duration: 7 Dec 199811 Dec 1998

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