High-density barium titanate of high permittivity
AssigneeThe Regents of the University of California, a California corporation
InventorsGuodong Zhan, Amiya K. Mukherjee, Joshua D. Kuntz, Julin Wan
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Abstract
A nano-sized powder of barium titanate is compacted and sintered by spark plasma sintering under conditions creating a high heating rate to achieve a densified material that demonstrates superior permittivity.
Claims21
A process for the preparation of a dense body of barium titanate, said process comprising consolidating a powder mixture of barium titanate particles having diameters of at most about 100 nm into a consolidated mass, and compressing said consolidated mass while sintering said consolidated mass by spark plasma sintering under processing conditions causing said consolidated mass to rise to a sintering temperature of at least about 900° C. at a heating rate which, once said consolidated mass surpasses about 600° C., is at least about 350° C. per minute, to produce a barium titanate body having at least 98% theoretical density.
Dependencies are inferred from the claim text.