Thermal analysis of the interaction of phosphorite with condensed phosphates of calcium
1976; Volume: 10; Issue: 2 Linguagem: Inglês
10.1007/bf01909681
ISSN0368-4466
AutoresM. Pyldme, É. Buzágh‐Gere, J. Pyldme, Mihkel Veiderma,
Tópico(s)Chemical Synthesis and Characterization
ResumoThe thermal reactions between Maardu (Estonia) phosphorite and acidic phosphates were investigated. TG, DTG and DTA of mixtures with H3PO4, Ca(H2PO4)2 · H2O, Ca2P2O7 and [Ca(PO3)2]n in different molar ratios showed a maximum mass loss when the CaO ∶ P2O5 value was 2. The main temperature ranges of the mass losses were determined. The probable reactions relating to the mass losses are given on the basis of the thermal curves and IR spectra.
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