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Composition of beryllium oxide ceramics
Refractories and Industrial Ceramics, 2011The physicochemical and electrophysical properties of ceramics based on BeO without impregnation and after impregnation with an aqueous solution of sodium carbonate Na 2 CO 3 are studied. It is established that impregnation leads to preparation of ceramic specimens with a white color, which develop increased porosity, lower amount of impurities and ...
G. P. Akishin +7 more
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Valence Levels of Beryllium Oxide
The Journal of Chemical Physics, 1966The low-lying valence levels of BeO, are calculated by the LCAO MO SCF method in order to ascertain the nature of the ground state of the molecule. Calculations of excited states using virtual orbitals are found to be inconclusive. Better results are found by doing variational calculations on three low-lying configurations for a series of internuclear ...
Verhaegen, Georges, Richards, WG Graham
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Cryogenic properties of aluminum-beryllium and beryllium oxide materials
SPIE Proceedings, 2003Ultimate tensile strength, yield strength, and elongation were obtained for the aluminum-beryllium alloy, AlBeMetl62 (38%Al-62%Be), at cryogenic (-195.5 C (-320 F) and (-252.8 C) (-423 F)) temperatures, and for an optical grade beryllium, O-30H (99%Be), at -252.8 C.
Wayne R. Gamwell, Preston B. McGill
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Self-supporting beryllium oxide targets
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1997Abstract A self-supporting beryllium oxide target preparation will be described with concern for the high toxicity of Be and its oxide. The target purity was confirmed by diffractometry and Rutherford backscattering.
Meens, A., Nicoli, M.P., Raiser, D.
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Dislocation Etchant for Beryllium Oxide
Journal of the American Ceramic Society, 1973A hydrochloric acid chemical etchant for BeO was refined and evaluated. The etchant, when used for 20 min at 120°C on chemically polished surfaces, produces distinctive pits at dislocations intersecting the (0001) and (101) surfaces. Correspondence of etch pits and dislocations was inferred by comparing the enlargement of pits with etching time and the
MICHAEL F. EHMAN, S. B. AUSTERMAN
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Beryllium oxide: a frost-preventing insulator
Optics Letters, 1990A method is suggested of achieving low outdoor radiative losses by low spectral emittance in the atmospheric window of 8-13 microm, which will reduce dew and frost formation on surfaces exposed to the clear sky. The use of this selectively low emittance makes it feasible to use electrically insulating materials.
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Beryllium Oxide Whiskers and Platelets
Journal of Applied Physics, 1962Beryllium oxide platelets and whiskers have been grown by heating beryllium metal in a silica furnace tube and boat with a hydrogen atmosphere for 16 hr at 1500°C. Three distinct types of whiskers formed: one type was parallel to the crystallographic c axis, another in the basal plane ([1̄010] direction), and the third in an intermediate direction ...
P. L. Edwards, R. J. Happel
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Use of Beryllium and Beryllium Oxide in Space Reactors
AIP Conference Proceedings, 2005Beryllium and beryllium oxide are attractive candidate materials for neutron reflector application in space reactors due to their beneficial combination of low density and high neutron moderation and reflection capabilities. Drawbacks to their use include the expense of working with toxic materials, a limited industrial infrastructure, and material ...
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Beryllium oxide is cost effective
1973 EIC 11th Electrical Insulation Conference, 1973Beryllium oxide possesses highly desired physical properties for microwave application. Examples are presented to correct misconceptions regarding its cost effectiveness. Safe handling procedures are discussed. New research developments are disclosed.
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Electron irradiation of beryllium oxide
Journal of Nuclear Materials, 1964Abstract Changes of the order of 0.01 per cent in macroscopic and X-ray density were observed when polycrystalline and single crystal specimens of beryllium oxide were irradiated by 1 MeV electrons to doses approaching 1021 electrons per square centimetre at about 100° C. However, in similar experiments on polycrystalline material, previously neutron-
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