Refractory composition and process for forming article therefrom
a technology of phosphoric acid and composition, which is applied in the direction of immunoglobulins, solid waste management, peptides, etc., can solve the problems of reducing the strength properties of cement formed with extra phosphoric acid relative to cast precured, mechanical failure, and limiting the high temperature limit of operation of the resulting material, etc., to achieve the effect of improving the handling characteristics and the strength of the articl
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example 1
[0024]5% aluminum metaphosphate was mixed into bauxite aggregate along with 4½ total weight percent water and 0.1% polyethylene glycol having a molecular weight of more than 300 grams per mole. Upon drying and firing at 800° Celsius. for 5 hours, a ceramic was obtained having a crystalline aluminum orthophosphate continuous binder matrix phase as determined by x-ray powder diffraction.
example 2
[0025]The slurry of Example 1 was modified to include 5% by slurry weight calcium aluminate cement with comparable results.
example 3
[0026]To the slurry of Example 2, dry sodium silicate was added to 0.015 total percent. An increase in green strength is noted and faster setting time that facilitated ease of demolding and also produced a crystalline aluminum orthophosphate matrix phase.
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