"High-alumina refractories (99+ % Al₂O₃) were produced by pressing a mixture of 70% tabular alumina and 30% reactive alumina and autoclaving in saturated steam at 1.4 MPa (200 psia)/194 °C to 3.4 MPa (500 psia)/242 °C for 12 to 96 h. Autoclaving converted the reactive alumina to boehmite which acted as the bond phase. At room temperature the MOR ranged up to 37 MPa depending upon boehmite content. The hot-MOR decreased steadily with increasing temperature, but was still 8 MPa at 1400 °C which exceeds that of comparable cement-bonded or conventionally fired high-alumina refractories. The estimated autoclaving costs are lower than conventional firing costs, but the overall economics of boehmite-bonded refractories are highly dependent upon the cost of the alumina used to form boehmite"--Abstract, page 1.
Day, D. E.
Materials Science and Engineering
M.S. in Ceramic Engineering
Materials Research Center
University of Missouri--Rolla
viii, 53 pages
© 1979 Gerhard H. Schiroky, All rights reserved.
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Schiroky, Gerhard H., "Boehmite-bonded high-alumina refractories" (1979). Masters Theses. 3544.
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