Phase evolution and thermal behaviors of the solid-state reaction between SrCO 3 and Al 2O 3 to form SrAl 2O 4 under air and CO 2-air atmospheres

Yu Lun Chang, Hsing I. Hsiang, Ming Tsai Liang, Fu Su Yen

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9 Citations (Scopus)

Abstract

The solid-state reactions between SrCO 3 and Al 2O 3 forming SrAl 2O 4 under air and CO 2-air atmospheres were investigated. The solid-state reaction between SrCO 3 and Al 2O 3 under a CO 2 atmosphere can be separated into multiple reaction stages. The first stage is attributed to the formation of SrAl 2O 4 resulting from the reaction between SrCO 3 and Al 2O 3. The diffusion of Al 2O 3 through the product layer then takes place to continue the reaction. At a higher temperature, the Sr 3Al 2O 6 formation reaction occurs due to the chemical reaction between SrCO 3 and SrAl 2O 4. The SrCO 3 is thermally finally decomposed. The resulting SrO may diffuse rapidly through the product layer, producing pure SrAl 2O 4 formation via a complicated diffusion process at a much higher temperature. These reaction stages occur at very close temperatures under an air atmosphere, leading to a complex reaction between the solids in air.

Original languageEnglish
Pages (from-to)2269-2276
Number of pages8
JournalCeramics International
Volume38
Issue number3
DOIs
Publication statusPublished - 2012 Apr 1

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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