| 摘要 |
<p>An aqueous soln (pH >=8) of at least one divalent metal salt selected from Mn, Fe, Co, Ni, Cu, Zn Mg is mixed with pure Fe(OH)3 in more than the stoichiometric amount and autoclaved at 200-300 degrees for 2-6 hrs to dissolve the Fe(OH)3. Upon cooling, the resultant fine crystals of ferrite are filtered and washed.</p> |
