SrTiO_3セラミックスの粒界の組成分布 : 組成・構造

概要

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The distribution of elements and the structure near grain boundaries in SrTiO_3 ceramics were investigated by using TEM, μAES and SIMS. TEM results showed that a secondary phase was formed at grain boundaries. Depth profiles of μAES showed that the concentration of strontium decreased in the region near the grain boundary, while that of bismuth and oxygen increased. The composition of the secondary phase was estimated to be Bi : Ti : O=2 : 2 : 7 with a small amount of Sr. The distribution of other minor elements was analyzed by SIMS. Bismuth ions were enriched at almost all grain boundaries, while that of manganese were reduced. Ca ions were always found together with Bi ions.
社団法人日本セラミックス協会の論文
1990-08-01