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:
Sep. 21, 2010
Filed:
Sep. 11, 2008
Gary L. Messing, State College, PA (US);
Elizabeth R. Kupp, Centre Hall, PA (US);
Sang-ho Lee, State College, PA (US);
Garnia Y. Juwondo, State College, PA (US);
Adam J. Stevenson, State College, PA (US);
Gary L. Messing, State College, PA (US);
Elizabeth R. Kupp, Centre Hall, PA (US);
Sang-Ho Lee, State College, PA (US);
Garnia Y. Juwondo, State College, PA (US);
Adam J. Stevenson, State College, PA (US);
The Penn State Research Foundation, University Park, PA (US);
Abstract
The disclosed invention relates to a method of manufacture of transparent ceramics such as yttrium aluminum garnet by tape casting. The method entails forming a mixture of ceramic oxide, dispersant and organic solvent, milling the mixture to produce a first slurry, mixing the first slurry with an organic binder and a plasticizer to form a treated slurry, milling the treated slurry to produce milled slurry, tape casting the milled slurry to produce cast tape, drying the cast tape to produce dried tape, stacking portions of dried tape to form an assembly, compressing the assembly to produce a preform, heating the preform to produce a green preform, and sintering the green preform to produce transparent yttrium aluminum garnet. The method may be used to produce a unitary ceramic product having differing transparent sections as well as transparent ceramic product having a dopant gradient across a portion of the thickness of the product.