Grey oxide(lead sub-oxide)

These oxides of Gray to greenish Grey colour are a mixture of free lead and lead monoxide.

The Grey Oxide is produced in ball mill plant. The chemical formula of Lead suboxide is (2PbO.Pb). The Lead suboxide is used extensively in preparation of plates in Lead Acid Batteries.

The general chemical / physical parameters for grey sub-oxide are indicated as follows.

Lead monoxide % 75-65
Free lead % 25-35
Acid absorption mg/gm 160-240
Apparent density 1.35-1.50
Fineness (+240 mesh Retention) 1-2%
Acid absorption mg/gm 160-200
Water Absorption mg/gm 110-120
Color Blackish to Greenish Grey
Water Absorption mg/gm 110-120