| abstract |
A METHOD OF PREPARING FLEXIBLE, REFRACTORY INORGANIC FIBERS. A REFRACTORY INORGANIC OXIDE SOL, E.G., AN ALUMINA SOL, IS ADMIXED A SOLUBLE ORGANIC AMINE, SUITABLY HEXAMETHYLENETETRAMINE, AND DRAWN INTO FIBERS. THE FIBERS ARE THEREAFTER CALCINED AT 300-1000*C. TO PRODUCE POROUS FLEXIBLE FIBERS OF HIGH SURFACE AREA. THE HEXAMETHYLENETETRAMINE HAS THE EFFECT OF INHIBITING CRYSTALS GROWTH OF THE GAMMA-ALUMINA DURING THE FIBER CALCINING STEP. |