| Highly viscous mono-aluminium phosphate and aluminiumchromium
phosphate were prepared from out of standard
chemicals for the purpose of studying the relative advantages
when employed for bonding inert aggregates of
fused alumina.
These were incorporated in a mix composed essentially
of fused grains of bauxite, constituting the relatively inert
matrix with a view to developing some suitable ramming
masses which might meet the severe conditions of applications
at high temperatures. The cold crushing strengths
of such bodies and also hot mechanical strength, as determined
from refractoriness under load, and compressional
torsional creep measurements revealed that aluminium
chromium phosphate was superior to mono-aluminium
phosphate in spite of its lower P 20 5 content. The enhancement
of strength is ascribed to greater thermal stability of
aluminium-chromium phosphate. |
