Arc-melting preparation of single crystal LaB.sub.6 cathodes

Details Arc-melting preparation of single crystal LaB.sub.6 cathodes Arc-melting preparation of single crystal LaB.sub.6 cathodes

1976-01-27

1977-06-21

Yudkoff, Norman

Adhesive bonding and miscellaneous chemical manufacture

Delaminating processes adapted for specified product

Delaminating in preparation for post processing recycling step

156620, 156DIG63, 156DIG86, 423263, 423289, B01J 1710, C01B 3518, C01F 1700

Patent

active

040309630

ABSTRACT:
A method for preparing single crystals of lanthanum hexaboride (LaB.sub.6) by arc melting a rod of compacted LaB.sub.6 powder. The method is especially suitable for preparing single crystal LaB.sub.6 cathodes for use in scanning electron microscopes (SEM) and scanning transmission electron microscopes (STEM).

REFERENCES:
patent: 3224844 (1965-12-01), Gerthsen
patent: 3326820 (1967-06-01), Cuomo et al.
patent: 3410666 (1968-11-01), Scott et al.
patent: 3442719 (1969-05-01), Drabble et al.
Lawson et al., "Preparation of Single Crystals", London, Butterworths Scientific Publications, p. 65, (1958).

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