Microwave‐Assisted Production of Amorphous Calcium Magnesium Phosphate: Study From Co‐Precipitation to Sintered Products

Under microwave irradiation, agglomerates of nanospherical amorphous calcium magnesium phosphate ( ACMP ) particles were precipitated from a source solution with Ca ²⁺ , Mg ²⁺ , and PO ₄ ³⁻ . These precipitates were achieved when Mg ²⁺ was added no less than three times concentrated of Ca ²⁺ . Otherwise, the as‐precipitated powder would only be a mixture of brushite ( DCPD ) and calcium sodium phosphate ( CNP ) with poor Mg ²⁺ substitution. As compared to the mixture of DCPD and CNP , the as‐formed ACMP presented great densification during sintering. Moreover, the as‐sintered products were bioactive with final composition of magnesium pyrophosphate ( MPP ), β‐tricalcium phosphate (β‐ TCP ), and calcium pyrophosphate ( CPP ).