Oxide solid solutions derived from homogeneous carbonate precursors

The CaO-MnO solid solution

K. R. Poeppelmeier, H. S. Horowitz, J. M. Longo

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Thermal decomposition of the mixed carbonate solid solution Ca1 - x-Mnx CO3 (0.0 ≤ x ≤ 1.0) at 1273 K in hydrogen results in the respective oxide solid solutions Ca1 - xMnxO. Thermolysis at temperatures less than 1173 K of the homogeneous carbonate phase, Ca1 - xMnxCO3 (x = 0.5) results in incomplete solid solution and a calcium and manganese oxiderich mixture. The miscibility gap extends from 25 to 85 mol% MnO at 873 K. The decomposition reactions were conducted in a hydrogen atmosphere in order to maintain manganese in the divalent state. These results are compared with earlier decomposition studies conducted at reduced pressures of carbon dioxide and in vacuo. The important role of the decomposition mechanism in the application of the solid solution precursor method to solid state reactions is emphasized.

Original languageEnglish
Pages (from-to)219-227
Number of pages9
JournalJournal of the Less-Common Metals
Volume116
Issue number1
DOIs
Publication statusPublished - Feb 1 1986

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Carbonates
Oxides
Solid solutions
Manganese
Decomposition
Hydrogen
Thermolysis
Solid state reactions
Carbon Dioxide
Calcium
Carbon dioxide
Pyrolysis
Solubility
Temperature

ASJC Scopus subject areas

  • Engineering(all)

Cite this

Oxide solid solutions derived from homogeneous carbonate precursors : The CaO-MnO solid solution. / Poeppelmeier, K. R.; Horowitz, H. S.; Longo, J. M.

In: Journal of the Less-Common Metals, Vol. 116, No. 1, 01.02.1986, p. 219-227.

Research output: Contribution to journalArticle

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