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Impurity Distribution in MgO
Author(s) -
LEIPOLD MARTIN H.
Publication year - 1966
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1966.tb13307.x
Subject(s) - impurity , crystallite , agglomerate , grain boundary , materials science , microprobe , economies of agglomeration , electron microprobe , analytical chemistry (journal) , metallurgy , mineralogy , crystallography , chemistry , chemical engineering , microstructure , composite material , chromatography , organic chemistry , engineering
Microprobe studies were conducted on hot‐pressed polycrystalline MgO compacts, nominally 99.5 and 99.95% pure. Results indicated that in MgO some common impurities, such as Al, Ca, and Si, when present in amounts as small as 30 atomic ppm, were segregated to grain boundaries. Mutually incompatible segregated phases existed at grain boundaries. Other impurities such as Fe appeared to be uniformly distributed. Although some impurity agglomeration was noted, it was not required for impurity segregation. The presence of such agglomerates would complicate the problems of chemical analysis.