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