Patent Number: 7,785,527

Title: Method of making mixed metal oxide ceramics

Abstract: A method of making dielectric ceramics containing mixed metal oxides is provided. The method comprises the steps of at least partially coating a metal oxide powder with a metal hydroxide or metal oxide, compacting the coated powder with one or more additional metal compounds or metal compound precursors, and directly sintering the compact in a single step. The method of the invention may be used to avoid occurrence of significant quantities of one or more undesired but thermodynamically or kinetically favored side products. The method of the invention may also be used to synthesize perovskites, in particular lead-magnesium-niobium (PMN), lead-magnesium-niobium-lead-titanium (PMN-PT) perovskites, or lead zirconate titanate (PZT).

Inventors: Shih; Wei-Heng (Bryn Mawr, PA), Gu; Huiming (Holmes, PA), Shih; Wan Y. (Bryn Mawr, PA)

Assignee: Drexel University

International Classification: B28B 1/00 (20060101)

Expiration Date: 8/31/12018