Neutron-protection heat insulating material

Details Neutron-protection heat insulating material Neutron-protection heat insulating material

1978-09-28

1981-12-01

Kyle, Deborah L.

Compositions

X-ray or neutron shield

106 99, 250517, 250515, 252 62, 423331, 428443, 428920, 376288, 376289, 376904, G21F 106, G21C 1106

Patent

active

043035531

ABSTRACT:
A neutron protection thermal insulating material is obtained by adding a boron compound and, if necessary, a hydrous compound, to chrysotile asbestos fibers. To form the material, the asbestos is opened with the use of a surface active agent in the presence of water. The boron compound is added and air bubbles are incorporated into the mixture which is then dried, molded and compressed. The resulting product is characterized by a construction wherein the opened asbestos fibers are oriented in substantially parallel relation to each other and in the direction perpendicular to the compression direction and air pockets are flatly arranged between the fibers and substantially parallel thereto to reduce thermal conduction through the material in the direction parallel to the direction of compression.

REFERENCES:
patent: 2626213 (1953-01-01), Novak
patent: 3154463 (1964-10-01), Kjell-Berger
patent: 3449202 (1969-06-01), Bowen
patent: 3661603 (1972-05-01), Nicol
patent: 3663250 (1972-05-01), Gerow
patent: 3884839 (1975-05-01), Bon et al.
patent: 3945887 (1976-03-01), Lemercier
Hodge, N. et al., "Neutron-Shield Materials", Nucleonics 19 (11) (Nov. 1961) pp. 158-166).

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