铅酸电池铅膏中碱式硫酸铅的变化

Battery plate curing process of tribasic lead sulfate paste paste the change there are two types of skeleton: three basic lead sulfate ( 3BS ) and four basic lead sulfate ( 4BS ), which mainly depends on temperature and curing temperature and cream.

A. 3BS crystal combination and paste temperature of 30-60 ℃, 30-60℃curing temperature.

B. 4BS crystal combination and paste temperature 75-95 ℃, paste is consisted of 4BS crystal. This paste during the curing process is mainly the small crystals dissolve away, as well as the 4BS crystal to grow and aggregation. These processes occur in 80-95 ℃, time 10-24h or 40- 60 ℃, time 24-48h curing process.

When the preparation of paste at 50 ℃is mainly comprised of 3BS crystal phase, 3BS crystal in 80-95℃temperature and saturated water vapor conditions 24-30h or 120-180℃, time 1-4h curing can be transformed into 4BS crystal. In two of these cases is the main problem of 4BS grain nucleation rate. A fairly high rate to ensure that the 4BS crystal nucleation, throughout all paste body to form homogeneous distribution of 4BS crystal size chaos balance. In the initial paste of a certain 3BS crystal content, at the same time also orthorhombic crystal PbO PbO and affirmative, they solidified in high temperature, will achieve 3BS into 4BS, higher curing temperature had higher 4BS crystal nucleation rate.