Nomenclature
CAS number: 1304-56-9
Beryllia.
BeO; mol wt 25.01.
Be 36.03%, O 63.97%.
Description and references
Prepn: Gmelins, Beryllium (8th ed.) 26, 82-91 (1930); Ehrlich in Handbook of Preparative Inorganic Chemistry vol. 1, G. Brauer, Ed. (Academic Press, New York, 2nd
ed., 1963) p 893. Review: Lillie, USAEC UCRL 6457, 23 pp (1961).
Properties
Light, amorphous powder. mp 2530°. Very sparingly sol in water; slowly
sol in concd acids or solns of fixed alkali hydroxides. After ignition
it is almost insol in these solvents. Pure (100%) BeO insulates electrically
like a ceramic, but conducts heat like a metal. Electrical resistivity
in ohm-cm: >1016. Dielectric const at 8.5 gigacycles:
6.57.Caution
Beryllium and beryllium compounds
are listed as known human carcinogens: Report
on Carcinogens, Eleventh Edition (PB2005-104914, 2004)
p III-32.Use
Manuf of beryllium oxide ceramics, glass; in nuclear
reactor fuels and moderators; catalyst for organic reactions.