Can we use metal sulfates instead of metal chlorides for the preparation of synthesis of crystal MFe2O4 (M = Mg, Cu, Ni) microspheres?
Almost certainly not. Decomposition of the sulfate in such systems will produce the sulfide and not the ferrite (oxide).
Sulfates are mostly thermodynamically more stable at high temperatures in air than chlorides. When chlorides of iron, nickel, magnesium and copper oxidize in air when heated (350-600°C) to oxides, the sulphates remain unaffected. Sulfates in air are simply melted (iron sulfate and magnesium sulfate) or melt with decomposition:
Fe2(SO4)3 at 480°C without decomposition
NiSO4 at 840°C with decomposition
CuSO4 at 560°C with decomposition
MgSO4 at 1127°C without decomposition
Thank you, professor, Alan F Rawle and Vadim VerlotskiVadim Verlotski for sharing useful information·
- Please give more detalis about the scheme that you want to use. Then I will be able to give more detailed answers.
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