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PURE BERYLLIUM OXIDE AS A REFRACTORY *
Author(s) -
Norton F. H.
Publication year - 1947
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.1151-2916.1947.tb18890.x
Subject(s) - materials science , metallurgy , calcination , ball mill , beryllium oxide , oxide , refractory (planetary science) , hydroxide , beryllium , mineralogy , chemistry , inorganic chemistry , biochemistry , organic chemistry , catalysis
A bstract The development of a pure BeO refractory is described, using pure Be(OH) 2 as the starting material. The hydroxide is calcined at 1200° (low) to 1800°C. (high), depending on the crystal size desired. The calcine is ball milled wet in a steel mill and cast at pH 4.5 to 5.0, or the powder may be dried and mixed with 14% Carbowax 4000 added as a water solution for dry pressing at 20,000 to 30,000 lb. per sq. in. The pressed product is vitreous when fired at 1800°C. but is also volatile at that temperature.