Ceramics based on beta-CaSiO3 wollastonite with additives of perovskite and sintering aluminum-copper-lithium additive were obtained. The effect of a sintering additive on ceramic and dielectric properties in the CaCiO3/Al2O3–CuO–Li2CO3 and CaCiO3/CaCiO3–Al2O3–CuO–Li2CO3 systems is described. The thermal conductivity ? of the obtained samples is in the range of 0.43...0.65 W/(m?K), which is typical for wollastonite ceramics. The dielectric constant was ?r = 4.9...8.0, the tangent of the dielectric loss angle – tg? = (15.3...17.9)·10–3 at a frequency of f = 1 MHz, and the average density is ?ср = 2.44...2.63 g/cm3. Sintering of the samples was carried out at temperatures of 875...950 ?С. The properties of the resulting ceramics, combined with low thermal conductivity, meet the requirements for heat-resistant ceramic cases and plates for microelectronics applications using LTCC technology.
Denis S. Voloschuk – postgraduate student of the Department of Chemical Technology of Ceramics and Refractories, Mendeleev University of Chemical Technology of Russia (MUCTR), Moscow, Russia
Nikolay A. Makarov – Doctor of Technical Sciences, Professor, head of the Department of Chemical Technology of Ceramics and Refractories, Mendeleev University of Chemical Technology of Russia (MUCTR), Moscow, Russia
Valery V. Anisimov – Candidate of Technical Sciences, Associate Professor of the Department of Chemical Technology of Ceramics and Refractories, Mendeleev University of Chemical Technology of Russia (MUCTR), Moscow, Russia
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DOI: 10.14489/glc.2025.07.pp.020-027
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