Thermal behavior of SrSO{sub 4}-SrCO{sub 3} and SrSO{sub 4}-SrCO{sub 3}-Al{sub 2}O{sub 3} mixtures

Journal Article · Mon Oct 15 04:00:00 EDT 2007 · Materials Characterization

DOI:https://doi.org/10.1016/j.matchar.2006.08.005· OSTI ID:21062154

Almanza R, J; Flores V, A; Herrera T, M ^[1]

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1. CINVESTAV-Unidad Saltillo Carretera Saltillo-Monterrey Km 13, A. P. 663. 25000, Saltillo, Coahuila (Mexico)

The high temperature behavior of SrSO{sub 4}, SrCO{sub 3} and Al{sub 2}O{sub 3} mixtures was studied. A mixture of 1:1 mole of SrSO{sub 4} and mechanically activated SrCO{sub 3} was mixed and characterized using thermal gravimetric analysis. Some samples were uniaxially pressed and sintered at 1100, 1200 and 1300 deg. C for 8 h and then analyzed using X-ray diffraction and scanning electron microscopy. Additionally, a mixture of SrSO{sub 4}:SrCO{sub 3}:Al{sub 2}O{sub 3} was uniaxially pressed and sintered at 1500 deg. C. The decomposition temperature of SrCO{sub 3} was decreased 18 deg. by milling for 180 min. Samples sintered at 1300 deg. C showed a microstructure free of porosity. X-ray diffraction analysis showed the presence of SrO and SrSO{sub 4} after sintering at 1100, 1200 and 1300 deg. C. The mixture containing alumina showed the formation of a strontium aluminum oxide sulfate compound in addition to strontium aluminate.

• OSTI ID: 21062154
• Journal Information: Materials Characterization, Journal Name: Materials Characterization Journal Issue: 10 Vol. 58; ISSN 1044-5803; ISSN MACHEX
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINATES
ALUMINIUM OXIDES
DECOMPOSITION
MICROSTRUCTURE
MIXTURES
POROSITY
SCANNING ELECTRON MICROSCOPY
SINTERING
STRONTIUM CARBONATES
STRONTIUM OXIDES
STRONTIUM SULFATES
TEMPERATURE RANGE 1000-4000 K
THERMAL GRAVIMETRIC ANALYSIS
X-RAY DIFFRACTION