Physico-chemical Studies on Thermal Decomposition of Alkali Tris(maleato)ferrates(III) |
| |
Authors: | Randhawa B S Sweety Kamaljeet |
| |
Institution: | (1) Department of Chemistry, G.N.D.U., Amritsar, 143005, India |
| |
Abstract: | The thermal decomposition of alkali tris(maleato)ferrates(III), M3 Fe(C2 H2 C2 O4 )3 ] (M =Li, Na, K) has been studied isothermally and non-isothermally employing simultaneous TG-DTG-DTA, XRD, Mössbauer and IR spectroscopic techniques. The anhydrous complexes decompose in the temperature range 215–300°C to yield Fe(II)maleate as an intermediate followed by demixing of the cations forming α-Fe2 O3 and alkali metal maleate/oxalate in successive stages. In the final stage of remixing of the cations (430–550°C) a solid state reaction occurs between α-Fe2 O3 and alkali metal carbonate leading to the formation of fine particles of respective ferrites. The thermal stabilities of the complexes have been compared with that of alkali tris(oxalato)ferrates(III). |
| |
Keywords: | alkali Fe(III)maleates DTA ferrites M?ssbauer spectra TG thermal decomposition |
本文献已被 SpringerLink 等数据库收录! |
|