Studies on the thermal behavior of a complex mineral fertilizer of nitrophosphate type

This paper presents some studies on the thermal behavior of a complex mineral fertilizer of nitrophosphate type. The crystalline phases present in the initial fertilizer have been identified by means of X-ray diffractometry: NH4NO3, NH4H2PO4 and Ca(NH4)2(HPO4)2·H2O. The processes occurring in the fertilizer when heated, have been elucidated comparing the TG and DTG curves of the fertilizer, with those of the present components and using the X-ray diffraction patterns of the products resulting after the thermal treatment of the fertilizer at various temperatures.