FIELD: electricity.
SUBSTANCE: invention may be used in various electrotechnical devices operating in area of high temperatures, using rubidium or rubidium-containing materials as a working substance. According to invention, a solid electrolyte comprises rubidium monoferrite with addition of multi-charge cations of V group of periodic system in amount of 0.3-1.6 at.%. Composition of solid electrolyte meets a common formula Rb2-2xFe2-x"Э"V xO4, where x=0.025-0.125.
EFFECT: reduced specific resistance of solid electrolyte at higher temperatures.
2 cl, 2 ex
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