Specifics of Obtaining a Vacuum-Tight Weakly Conductive Ceramics Based on Barium Aluminate

Abstract

Barium aluminate ceramics with iron (III) oxide and lithium hydroxide additives was obtained by solid-phase synthesis. It has been established that high-temperature treatment in an oxidizing environment contributes to the production of vacuum-tight samples that meet the “absolutely impermeable” tightness criterion, while having a density of 3.75 g/cm³, compressive strength of 597.1 MPa, and electrical conductivity ranging from 1.50·10 ^{– 7} to 1.05 × 10^–4 S/cm (at 90 – 300°C).