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A Novel Co-Precipitation Route for the Synthesis of Fine Mixed-Oxide Powders

Published online by Cambridge University Press:  25 February 2011

Amita Pathak  and
P Pramanik
Amita Pathak
Affiliation:
Department of chemistry, Indian Institute of Technology, Kharagpur 721 302, INDIA
P Pramanik
Affiliation:
Department of chemistry, Indian Institute of Technology, Kharagpur 721 302, INDIA
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Abstract

A new co-precipitation technique for the preparation of fine ceramic mixed-oxide povders using a mixture of (NH4)HCO3, triethylamine and formaline in presence of soluble polymers, like polyvinyl alcohol (PVA). The mixture is chemically equivalent to one mole of triethylamnroniumcarbonate (TEAC). The mixed-oxide ccmpositions synthesized and characterized are - MN2O4 [Spinels; where M = Ni(II), Cu(II), Zn(II), Co(II) and N = Fe(III), tr(III)]; M3Fe5O12 [Garnets; where M = Y(III), Gd(III)] and RBa2Cu3O7+δ [Ceramic superconductors; where R = rare-earths]. The final product is characterized by X-ray diffraction (XRD), energy dispersive X-ray spectroscopy for microanalysis (EDX) and scanning electron microscopy (SEM).

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 249: Symposium Q – Synthesis and Processing of Ceramics: Scientific Issues , 1991 , 171
Copyright
Copyright © Materials Research Society 1992

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References

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