Aluminum phosphates and binder compositions/ceramic materials comprised thereof
US5707442A · kind A · utility
28Cited by
10References
24Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 15, 1995 |
| Grant date | Jan 13, 1998 |
| Priority date | — |
| Expiry date | Nov 15, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/447
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Novel aluminum phosphates, in particular amorphous aluminum phosphate powders having a BET specific surface no greater than 25 m.sup.2 /g, well suited as binders/hardeners or for the production of ceramic shaped articles, are prepared by reacting at least one aluminum compound, e.g., an aluminum oxide, hydroxide or oxyhydroxide, with phosphoric acid or an aluminum phosphate, e.g., an acid aluminum orthophosphate, in a liquid reaction medium devoid of inorganic acid anions other than of phosphoric acid, and then spray- or freeze-drying the suspension thus obtained.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.