Aluminum phosphates and binder compositions/ceramic materials co

Details Aluminum phosphates and binder compositions/ceramic materials co Aluminum phosphates and binder compositions/ceramic materials co

1994-03-17

1996-03-05

Bell, Mark L.

Chemistry of inorganic compounds

Phosphorus or compound thereof

Oxygen containing

423309, 423311, 501 1, 501127, 501153, C01B 1516, C01B 2526, C04B 3510

Patent

active

054965292

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.

REFERENCES:
patent: 3813253 (1974-05-01), Neises
patent: 3899342 (1975-08-01), Birchall et al.
patent: 3900331 (1975-08-01), Cassidy
patent: 3923534 (1975-12-01), Cassidy
patent: 3943231 (1976-03-01), Wasel-Nielen et al.
patent: 3945839 (1976-03-01), Manigault
patent: 4394174 (1983-07-01), Tomic
patent: 4833576 (1989-05-01), Mers et al.

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