| Autor: |
Kuznetsov, Yu., Shmitt-Fogelevich, S. |
| Zdroj: |
Refractories; 1975, Vol. 16 Issue 5/6, p300-302, 3p |
| Abstrakt: |
In mixtures of kaolin, or semiacid clay with orthophosphoric acid a chemical reaction sets in already after drying at 100 °C. The main crystalline product of the reaction takes the form of aluminum phosphate (AlPO). After exposure to 400°C the x-ray diagrams contain no kaolinite lines which is evidence that the kaolinite is completely decomposed. This finding is also corroborated by the weight loss with an increase in the temperatures and by the presence of effects on the thermograms. The aluminum phosphate occurs mainly (up to about 1300°C) in a crystalline form similar to β-eristobalite. The amounts in which it occurs in forms similar to α-tridymite and α-quartz are small. Firing these mixtures appeared to produce neither PO and SiO compounds nor mullite. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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