The pzc of H+-kaolins determined by titration method is nearly pH = 3. The pzc of SiO2 + Al2O3 mixtures is not additive, and depends principally on Al2O3 content in mixture. The curve pzc—t°C (t°C = temperature of treatment of kaolins) has two maxima: 4·7 after treatment at 800-900°C, and 5 after treatment at 1300°C.
No takes yet. Share an insight, caveat, or question.
Tschapek et al. (1974) studied this question.
Synapse has enriched 3 closely related papers on similar clinical questions. Consider them for comparative context: