Barium bismuthate

Physical properties

Barium bismuthate, BaBiO₃, has a CAS number of 12785-50-1 and a molecular weight of 394.305 g/mol. It is a bronze crystal which decomposes at 1040°C.

Uses

Barium bismuthate has found usage in industry in alkaline batteries. The incorporation of small amounts (1-5 wt%) of semiconducting BaBiO_3-xand metallic Ba_0.6K_0.4BiO₃ additives on the rechargeability of electrolytic manganese dioxide cathodes in alkaline cells in the one-electron regime has been investigated.
BaBiO₃ is a semiconducting material and shows a good negative temperature coefficient (NTC) effect. NTC thermistors are thermally sensitive resistors whose resistance decreases with increasing temperature. They are mainly used in electronics for the suppression of in-rush current, for temperature measurement and control, and for compensation for other circuit elements.