CERAMIC CAPACITOR MATERIAL Russian patent published in 2025 - IPC C04B35/462 H01G4/12 

FIELD: chemistry.

SUBSTANCE: invention relates to the technology of producing ceramic materials for use in radio electronic devices of various types and can be implemented in the production of ceramic capacitors. Set task is solved by the fact that ceramic material for making capacitors, including hollandite-like solid solution of composition K_xFe_yTi_8-yO₁₆, where x = 1.4–1.6, y = 1.4–1.6, according to the proposed technical solution, additionally contains aluminium oxide Al₂O₃, or chromium oxide Cr₂O₃, or a combination thereof, niobium oxide Nb₂O₅ and lithium fluoride LiF in the following ratio of components, wt.%: Al₂O₃ and Cr₂O₃ in total 1; Nb₂O₅ 0.5–1.5; LiF 0.3–1.0; K_xFe_yTi_8-yO₁₆ is the rest. Optimum is composition in which hollandite-like solid solution of composition K_1.6Fe_1.6Ti_6.4O₁₆, as well as additives in an amount, wt.%: Al₂O₃ 0.5, Cr₂O₃ 0.5, Nb₂O₅ 1.2, LiF 0.8.

EFFECT: obtaining ceramic capacitor material based on hollandite-like solid solution K_xFe_yTi_8-yO₁₆, with low sintering temperature, less than 1000 °C, having in the medium-frequency range (f ≈ 1 kHz) with high dielectric constant (ε > 6000) at low dielectric losses (tgδ < 0.05).

2 cl, 1 tbl