Abstract
AbstractThe decomposition of Al4O4C in the presence of C at 1 473–1 873 K in vacuum was researched using the condensation products with high content of Al4O4C, formed in the carbothermal reduction of Al2O3, as the raw materials. The results showed that Al4O4C decomposed into gaseous products at 1 573–1 873 K in vacuum. It was speculated that Al4O4C decomposed into Al-containing gaseous species, CO and O2, and then the O2 reacted with C to form CO. The reaction of the O2 with C made the decomposition of Al4O4C take place more easily. With the decrease in temperature, the Al-containing gaseous species and CO formed condensates mainly consisting of Al4O4C, Al4C3 and Al2O3, and also containing Al at experimental temperatures of 1 773 K and 1 873 K.
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