Compositions: ceramic – Ceramic compositions – Titanate – zirconate – stannate – niobate – or tantalate or...
Reexamination Certificate
2008-07-10
2009-12-01
Le, H. (Holly) T (Department: 1794)
Compositions: ceramic
Ceramic compositions
Titanate, zirconate, stannate, niobate, or tantalate or...
C423S062000, C423S069000, C423S087000, C423S179000, C423S179500, C423S594170, C423S641000
Reexamination Certificate
active
07625831
ABSTRACT:
Anisotropically shaped ceramic particles are represented by the general formula {(K1−x−yNaxLiy)4(Nb1−zTaz)6O17+aMeOb} (where Me is at least one element selected from the group consisting of antimony, copper, manganese, vanadium, silicon, titanium, and tungsten; and b is a positive number determined by the valence of Me), where x, y, z, and a satisfy 0≦x≦0.5, 0≦y≦0.3, 0≦z≦0.3, and 0.001≦a≦0.1, respectively. The anisotropically shaped ceramic particles have a plate-like shape. The average particle size is 1 to 100 μm, and the ratio D/t of the maximum diameter D of a main surface to the thickness t in a direction perpendicular to the main surface is 2 or more, preferably 5 or more. Thus, anisotropically shaped ceramic particles suitable as a reactive template for preparing a crystal-oriented alkali metal niobate-based ceramic can be produced at relatively low production costs without the need for a complicated production process.
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Kimura Masahiko
Shiratsuyu Kosuke
Dickstein , Shapiro, LLP.
Le H. (Holly) T
Murata Manufacturing Co. Ltd.
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