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- W2031869764 abstract "The microwave dielectric properties and the microstructures of (1 − x)Zn2SiO4 − xCaTiO3 composite ceramics with Li2CO3–H3BO3 additives prepared by solid-state reaction method have been investigated. The crystalline phases were studied systematically by using the X-ray diffraction (XRD), microstructures by the scanning electron microscopy (SEM) and composition analysis by energy-dispersive spectroscopy (EDS). The τf of (1 − x)Zn2SiO4 − xCaTiO3 was found to be dependent on phase constitution, which is related to the amount of CaTiO3. When x = 0.05, the τf of (1 − x)Zn2SiO4 − xCaTiO3 was near 0 ppm/°C. The microwave dielectric properties of 0.95Zn2SiO4–0.05CaTiO3 ceramics samples with Li2CO3–H3BO3 additives sintered at 900–1000 °C were characterized, and the results indicated that the permittivity and Q × f were associated with the amount of Li2CO3–H3BO3 and the sintering temperature. The sintering temperature of ceramics was effectively reduced to 950 °C from about 1250 °C and the temperature coefficient of resonant frequency (τf) was modified to −4.5 ppm/°C with good Q × f. The addition of 4.0 wt% Li2CO3–H3BO3 in 0.95Zn2SiO4–0.05CaTiO3 ceramics sintered at 950 °C showed excellent dielectric properties of ɛr = 7.1, Q × f = 26,300 GHz (f = 7.1 GHz) and τf = −4.5 ppm/°C. Moreover, this material has a chemical compatibility with silver, making it a very promising candidate material for LTCC applications." @default.
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- W2031869764 date "2012-02-01" @default.
- W2031869764 modified "2023-09-27" @default.
- W2031869764 title "Low-temperature sintered Zn2SiO4–CaTiO3 ceramics with near-zero temperature coefficient of resonant frequency" @default.
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- W2031869764 doi "https://doi.org/10.1016/j.jallcom.2011.10.089" @default.
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