Setting and thermal reactions of phosphate investments.
The setting reactions and thermal degradation of the phosphate binders are interpreted from the DTA and X-ray diffraction data. Setting takes place through complex formation of (NH4Mg PO4.6H2O)n, excess reactants, and water. Dehydration and thermal reactions lead to a sequence of reactions forming (NH4MgPO4.H2O)n, (Mg2P2O7)n, Mg2P2O7, and Mg3(PO4)2.
D055598:Chemical Phenomena; D002627:Chemistry, Physical; D003460:Crystallization; D003734:Dental Casting Investment; D006358:Hot Temperature; D008277:Magnesium Oxide; D010710:Phosphates; D000644:Quaternary Ammonium Compounds; D013816:Thermodynamics; D014961:X-Ray Diffraction
D003734:Dental Casting Investment; D010710:Phosphates; D000644:Quaternary Ammonium Compounds; D008277:Magnesium Oxide