METHOD FOR PRODUCING INFRARED ZnS DOMES

摘要

A method for producing infrared ZnS domes comprises forming green body by CIP and sintering by hot pressing. In the present invention, the pressure transfers through inert particles hence distributes uniformly while the shape of the dome is controlled by a lower punch head. The ZnS ceramic domes produced by the method of the present invention are of uniform infrared properties with high yield.

主权项

1. A method for producing infrared ZnS domes comprising
forming a green body of a dome from ZnS powders by cold isostatic pressing, assembling the green body with a matched lower punch head, installing the green body and the matched lower punch head on a lower punch inside an outer die of a hot pressing mold, filling in inert particles between the outer die and the green body, followed by installing an upper punch, hot pressing sintering the filled hot pressing mold under a pressure of 200-400 MPa at 750-950° C. for 30-120 min in a vacuum pressing furnace with gaseous pressure lower than 1 Pa, and taking out an infrared ZnS dome from the hot pressing mold.