Effect of SiO2 and TiO2 Addition on the Morphology of Abnormally Grown Large Pb(Mg1/3Nb2/3)O3–35 mol% PbTiO3 Grains

Abstract

Abnormal grain growth (AGG) during the sintering of Pb(Mg1/3Nb2/3)O3–35 mol% PbTiO3 was investigated. When a small amount of SiO2 was added, large abnormal grains with the penetration twin characteristic were observed to appear. AGG, in this case, is because of the twin plane re‐entrant edges that provide coarsening advantage. When TiO2 was added, on the other hand, the abnormal grains were simple cubic in morphology with well‐developed {100} planes. In this case, the coarsening advantage is suggested to be because of grain boundary re‐entrant edges.