| 摘要 |
A batch, which fires to yield ceramic cordierite as the principal phase, consists of (i) a mineral component comprising clay and talc, and (ii) 5-50 wt.% of a chemical component comprising powdered oxides, hydroxides and hydrous oxides of Mg, Al and Si. The chemical component pref. comprises Mg, Al and Si oxide cpds. in a proportion to yield cordierite as a principal phase. The batch yields at least 94% cordierite on firing and has an overall compsn. of 47-53% SiO2, 33-41% Al2O3 and 11-17% MgO and the chemical component is 25-40 wt.% of the batch, or the overall compsn. of the batch is 41-56.5% SiO2, 30-50% Al2O3 and 9-20% MgO. Clay and talc are the sole sources of SiO2 and MgO in the mineral component. |
