METHOD OF PREPARING A PLURALITY OF CASTINGS HAVING A PREDETERMINED COMPOSITION

摘要

A method of simultaneously preparing a plurality of castings of a solution of an element or compound A in a solvent B which is an element and/or a compound, which solution is saturated at a temperature Ts. A problem in liquid epitaxy growth processes is the simple preparation of growth charges which are of sufficiently reproducible composition and size to produce epitaxial layers of reproducible composition and thickness. A melt 12 consisting of B, or of B together with at least one of the constituents of A, or of a solution of A in B which is unsaturated at Ts is prepared in a through 5 of a boat body of a liquid-tight boat assembly 1. An equilibrium is established at T-2 between the melt 12 and a solid body 13 which is an excess of any constituent in which the melt 12 is deficient with respect to the saturated solution, so as to form a saturated solution. The saturated solution is transferred into a plurality of moulds 9 in which this solution is allowed to solidity to form the castings. The solid body 13 is contained in a solid-retaining portion 6 of the trough 5, which portion 6 is separated from the remainder of the trough 5 by an apertured partition 8.