Ceramic preforms comprising monocrystalline hexagonal platelets

Details Ceramic preforms comprising monocrystalline hexagonal platelets Ceramic preforms comprising monocrystalline hexagonal platelets

1995-06-05

1998-10-06

Marcantoni, Paul

Compositions: ceramic

Ceramic compositions

Refractory

501153, C04B 3510

Patent

active

058175881

ABSTRACT:
Ceramic preforms comprising monocrystalline hexagonal platelets of .alpha.-alumina, well adopted for conversion into refractory bricks or ceramic composites, are prepared by crystallizing a settled fine powder of amorphous alumina, transition alumina or alumina hydrate, advantageously in the presence of a fluoro-compound flux, into a coherent mass of such hexagonal platelets of .alpha.-alumina.

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