Preparation of sulphides and selenides
OwnerAron Vecht, David William Smithinventors
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Abstract
Sulphides and selenides are prepared by dissolving sulphur or selenium in an aqueous or non-aqueous solution of hydrazine hydrate. The solution is combined with a solution of an appropriate cation to precipitate the corresponding sulphide or selenide. Solutions of two or more cations may be used to produce ternary compounds of sulphur and selenium, for example thio-gallates. Likewise both sulphur and selenium can be used together to produce sulpho-selenides. The method is particularly applicable to the production of doped phosphors by the inclusion of solutions containing the appropriate dopant.
Claims11
A method of preparing sulphides and selenides comprising dissolving sulphur or selenium in a solution consisting essentially of an aqueous solution of hydrazine hydrate at room temperature, and then combining the resulting solution with a solution of an appropriate cation to precipitate the corresponding sulphide or selenide.
A method of preparing sulphides and selenides comprising dissolving sulphur or selenium in a solution consisting essentially of hydrazine hydrate at room temperature, followed by combining the resulting solution with a solution of a cation selected from any one or more of the elements gallium, indium, thallium, germanium, tin, lead, arsenic, antimony and bismuth to precipitate the corresponding sulphide or selenide.
A method of preparing selenides comprising dissolving selenium in the hydrazine hydrate in the presence of an inert or aprotic non-aqueous solvent at room temperature, followed by combining the resulting solution with a solution of an appropriate cation to precipitate the corresponding selenide.
Dependencies are inferred from the claim text.