Abstract
Several sintering aids were tested to lower the CaZrO3 ceramic sintering temperature. Numerous additions are shown to lower the densification temperature and to promote the dielectric properties with a QF product, an insulating resistivity and a permittivity enhancement, and a lowering of the temperature coefficient τε. A combination of dopants was tested and optimised, resulting in a low temperature sintering ceramic based on CaZrO3, LiNO3, SiO2 and TiO2. The samples sintered at 1000°C in oxidising or reducing atmosphere exhibit very attractive properties, with a QF product of nearly 15, ε ∼ 28, a near zero τε and ρi ∼ 1012 Ω · cm. The sintering mechanisms of this ceramic are also debated.
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Pollet, M., Marinel, S. Copper electrodes multilayer ceramic capacitors Part I The dielectric composition. Journal of Materials Science 39, 1943–1958 (2004). https://doi.org/10.1023/B:JMSC.0000017756.82942.2f
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DOI: https://doi.org/10.1023/B:JMSC.0000017756.82942.2f