Method for making barium titanate powder, barium titanate powder prepared by the method, dielectric ceramic compact, and monolithic ceramic capacitor
AssigneeMurata Manufacturing Co., Ltd.
InventorsYasunari Nakamura, Masami Yabuuchi
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Abstract
A solid-phase method for making a barium titanate powder involves the steps of compounding powdered barium carbonate and powdered titanium oxide and calcining the mixture. The powdered barium carbonate used is needle particles having an aspect ratio of the length of the long axis to the length of the short axis of at least about 2. The powdered barium carbonate preferably has a specific surface area of about 5 m2/g or more. The resulting barium titanate powder is finer and homogeneous.
Claims10
A method for making a barium titanate powder comprising compounding powdered barium carbonate and powdered titanium oxide, and calcining the resulting mixture,
- wherein said powdered barium carbonate comprises needle particles having an aspect ratio of the length of the long axis to the length of the short axis as determined by electron microscopy of at least about 2.
Dependencies are inferred from the claim text.