Temperature history and microstructure of alumina Page: 5 of 127
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the samples. Generalization of two-step wintering to more systems is needed for practical
applications.
For 250 ppm MgO-doped A1203 ceramics, homogenization of powder compacts
at 800 C for 50 hours produces a sintered body with a grain size of about 0.80 ;im. The
refinement of grain size is more pronounced as a result of MgO-doping. It is explained
that not only MgO doping inhibits the grain growth kinetics of A1203 but also the
homogenization heat treatment improves the pore structure of the A1203 powder
compacts. This improvement is based on the explanation that the distribution of MgO
becomes more uniform during the homogenization heat treatment, which enhances the
effectiveness of MgO doping.
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Lin, Jiang Tsair. Temperature history and microstructure of alumina, thesis or dissertation, May 1, 1992; California. (https://digital.library.unt.edu/ark:/67531/metadc1400408/m1/5/?q=%22History%22: accessed July 17, 2024), University of North Texas Libraries, UNT Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.