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Translucent Sintered MgAl 2 O 4
Author(s) -
BRATTON R. J.
Publication year - 1974
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.1151-2916.1974.tb10901.x
Subject(s) - sintering , spinel , crystallite , materials science , ceramic , phase (matter) , liquid phase , relative density , mineralogy , metallurgy , chemical engineering , chemistry , thermodynamics , physics , organic chemistry , engineering
A translucent polycrystalline MgAl 2 O 4 ceramic was prepared from finely divided coprecipitated spinel in which a small amount of CaO added as a sintering aid was uniformly distributed. The CaO promotes densification through the formation of a liquid phase at the sintering temperatures. Depending on the sintering treatment, the relative density of the sintered spinel was 99.7 to ∼100% of theoretical. The in‐line optical transmission was > 10% from 0.3 to 6.5 μm. Total transmission in the visible region was between 67 and 78%.