抄録
We analyzed thermal phase changes (20°-1000°C) of binary mixtures of Al2(SO4)3·16 H2O(I), CaSO4·2H2O (II) and Na2SO4 (III) with MgHPO4·3H2O (IV). Thermal differential analyses (TG, DTG, DTA), IR, WAXS and thermorentgenography revealed that above mentioned mixtures heated during one hour up to 500°C and to 1000°C changed their structures. From among these three system of binary mixtures (I-IV; II-TV, III-IV) only (Na2SO4-MgHPO4· 3H2O), when the participation share of Na2SO4 was from 80 to 30% in the binary mixture, showed the formation NaMg4(PO4)3 with coexistence Na2SO4-Mg2P2O7 in samples.
