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 language | English |
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Pages (from-to) | 2269-2276 |
Number of pages | 8 |
Journal | Ceramics International |
Volume | 38 |
Issue number | 3 |
DOIs | |
Publication status | Published - 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