Reaction mechanism of magnesium potassium phosphate cement with high magnesium-to-phosphate ratio

Add time:08/14/2019    Source:sciencedirect.com

Understanding reaction mechanisms of magnesium potassium phosphate (MKP) cement is of significant importance, as it is closely related to the optimum design of MKP cement-based materials. In this study, reaction mechanisms of MKP cements with a high magnesium-to-phosphate (Mg/PO4) molar ratio of 8 were investigated at two different water-to-solid (w/s) ratios of 0.5 and 5. The experimental findings show that the use of this high Mg/PO4 molar ratio suppresses the formation of potassium-free magnesium phosphate hydrates. K-struvite is mainly formed with probably more phosphate than the theoretical value. Moreover, the w/s ratio plays a crucial role on governing the reaction path of MKP cements. The lower w/s ratio (w/s = 0.5) leads to higher potassium concentration and pH value, thus suppressing the formation of intermediate product, Mg2KH(PO4)2·15H2O, which is formed at the higher w/s = 5. However, it causes the formation of minor amount of brucite at 28 d, which coexists with K-struvite in the paste.

We also recommend Trading Suppliers and Manufacturers of AMMONIUM MAGNESIUM PHOSPHATE HEXAHYDRATE (cas 13478-16-5). Pls Click Website Link as below: cas 13478-16-5 suppliers

Prev:Infrared and Raman spectra of magnesium ammonium phosphate hexahydrate (struvite) and its isomorphous analogues. I. Spectra of protiated and partially deuterated magnesium potassium phosphate hexahydrate
Next:Effect of strontium substitution on the material properties and osteogenic potential of 3D powder printed magnesium phosphate scaffolds)