The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 17, 2012
Filed:
Dec. 19, 2007
Guenter Zeitler, Aachen, DE;
Herbert Schreinemacher, Baesweiler, DE;
Cornelis Ronda, Aachen, DE;
Koninklijke Philips Electronics N.V., Eindhoven, NL;
Abstract
A hot axial pressing method for sintering a ceramic powder, particularly doped Gd2O2S, comprises the step of placing a first porous body (), the ceramic powder () and a second porous body () into a mould shell () supported by a support (). The ceramic powder () is located between the porous bodies (). Gaseous components are evacuated from the ceramic powder () up to an ambient pressure of less than 0.8 bar. The porous body () and the ceramic powder () are heated to a maximum temperature of at least 900° C. and are applied to a pressure up to a maximum pressure of at least 75 Mpa. According to the invention the variation in time of the heating step and the variation in time of the pressure applying step is adjusted to each other such that the mould shellis held by the porous bodies () and/or the ceramic powder () in a state where the mould shell () and the support () are disconnected with respect to each other.