Abstract:
@ A process for the production of polyphosphide crystals characterised in that it comprises liquid phase growth of polyphosphide crystals from a polyphosphide melt. More particularly, the process may comprise
(A) heating a polyphosphide charge to a melt having a temperature substantially within the range of from 650 to 670°.C; and (B) slowly cooling the melt to form polyphosphide crystals.
Referring to the accompanying illustrative diagram, the present process may be applied to the growth of crystals of melt 22 on substrates 24 by tilting a sealed ampule 20. The present invention represents an advance over the prior art.
Abstract:
Self-setting potassium-aluminum-phosphate compositions of matter are prepared by forming an aqueous slurry of a potassium source, an aluminum source and a phosphate source; mixing the slurry for a period of time sufficient to form a reactive, creamy mass having a viscosity of at least 2000 cps; and setting or curing the reactive creamy mass. The product is porous, can be foamed or nonfoamed, adheres well to substrates and when foamed, can be lightweight.