Translucent ceramic, method of producing the same and optical devices
AssigneeMurata Manufacturing Co., Ltd.
InventorsNobuhiko Tanaka, Yukio Higuchi, Masayoshi Katsube, Mitsuru Sube
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Abstract
A ceramic material powder for a translucent ceramic is molded with a binder, and the resulting green compact is embedded in a ceramic powder having the same composition with the ceramic material powder. After removing the binder, the green compact embedded in the ceramic powder is fired in an atmosphere having an oxygen concentration higher than that in the removal procedure of the binder and thereby yields a translucent ceramic represented by Formula I: Ba{(SnuZr1-u)xMgyTaz}vOw, Formula II: Ba(ZrxMgyTaz)vOw or Formula III: Ba{(SnuZr1-u)x(ZntMg1-t)yNbz}vOw. The translucent ceramic has a refractive index of 1.9 or more and is paraelectric.
Claims20
A method of producing a translucent ceramic having a refractive index of equal to or more than 1.9 and being paraelectric and comprising a perovskite crystal phase, the method comprising the steps of:
- molding a ceramic material powder and a binder into a predetermined shape to thereby yield a ceramic green compact, bringing the ceramic green compact into contact with a ceramic powder having substantially the same composition with the ceramic material powder, and
- firing the ceramic green compact in contact with the ceramic powder to thereby yield a translucent ceramic.
Dependencies are inferred from the claim text.