Glycine-nitrate combustion synthesis of oxide ceramic powders

L. A. Chick, L. R. Pederson, G. D. Maupin, J. L. Bates, L. E. Thomas, G. J. Exarhos

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Abstract

A new combustion synthesis method, the glycine-nitrate process, has been used to prepare oxide ceramic powders, including substituted chromite and manganite powders of high quality. A precursor was prepared by combining glycine with metal nitrates in their appropriate stoichiometric ratios in an aqueous solution. The precursor was heated to evaporate excess water, yielding a viscous liquid. Further heating to about 180°C caused the precursor liquid to autoignite. Combustion was rapid and self-sustaining, with flame temperatures ranging from 1100 to 1450°C. The chromite product was compositionally homogeneous with a specific surface area of 32 m2/g, while the manganite product was composed of two distinct phases with a 23 m2/g surface area after calcination. When compared to similar compositions made using the amorphous citrate process, glycine-nitrate-produced powders had greater compositional uniformity, lower residual carbon levels and smaller particle sizes.

Original languageEnglish
Pages (from-to)6-12
Number of pages7
JournalMaterials Letters
Volume10
Issue number1-2
DOIs
Publication statusPublished - 1990
Externally publishedYes

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ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Chick, L. A., Pederson, L. R., Maupin, G. D., Bates, J. L., Thomas, L. E., & Exarhos, G. J. (1990). Glycine-nitrate combustion synthesis of oxide ceramic powders. Materials Letters, 10(1-2), 6-12. https://doi.org/10.1016/0167-577X(90)90003-5