Effect of Li2O and PbO Additions on Abnormal Grain Growth in the Pb(Mg1/3Nb2/3)O3–35 mol% PbTiO3 System |
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| Authors: | John Gerard Fisher Min-Soo Kim Ho-Yong Lee Suk-Joong L. Kang |
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| Affiliation: | Department of Materials Science and Engineering, Korea Advanced Institute of Science and Technology, Daejon 305-701, Korea;Division of Materials and Chemical Engineering, Sun Moon University, Asan 336-708, Korea |
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| Abstract: | Abnormal grain growth in Pb(Mg1/3Nb2/3)O3–35 mol% PbTiO3 (PMN-35PT) ceramics doped with Li2O and PbO has been investigated. Replacing the PbO dopant with up to 2 mol% Li2O caused an increase in the number of abnormal grains. For the composition containing 2 mol% Li2O and 6 mol% PbO, the amount of abnormal grain growth decreased with increasing sintering temperature. Single crystals of ∼6 mm × 6 mm × 2 mm thickness were grown from the 2 mol% Li2O, 6 mol% PbO-containing composition via the templated grain growth method. Grain growth behavior with temperature is explained in terms of the effect of Li2O on interface-reaction-controlled grain growth and the critical driving force. |
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| Keywords: | grain growth dopants/doping sinter/sintering |
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