| 摘要 |
<p>Amorphous precipitated silica which may be used to form battery separators of very low specific resistance is characterized by (a) a CTAB surface area in the range of from 140 to 185 m2/g; (b) a DBP oil absorption in the range of from 210 to 310 cm3/100 g; (c) a mean ultimate particle size in the range of from 10 to 18 nm; (d) a total intruded volume in the range of from 2.6 to 4 cm3/g; and (e) an intruded volume in the range of from 0.9 to 2 cm3/g for pores having diameters in the range of from 20 to 100 nm.</p> |
