Title:
TRANSLUCENT CERAMIC AND ELECTROOPTICAL PART
Document Type and Number:
WIPO Patent Application WO/2007/139060
Kind Code:
A1
Abstract:
A translucent ceramic comprising, as the main component, a tungsten-bronze-type
compound represented by the general formula [(Sr,Ba)NbvOw]
[wherein v represents a number ranging from 1.8 to 2.2 inclusive, and w represents
a positive number which can keep the compound electrically neutral], wherein
some of the Nb molecules are independently substituted by at least one element
(M) selected from Zn and Mg and the mole-based ratio of the substitution is 0.004
or greater. Preferably, the translucent ceramic contains at least one member
selected from Sn and Bi in an amount of 0.15 part by weight or more in terms of SnO2
and Bi2O3, respectively, relative to 100 parts by weight
of the main component, and the molar ratio of Ba in the (Sr,Ba) site ranges from
0.25 to 0.50. Also preferably, the translucent ceramic contains Na or La in an
amount of less than 25 parts by moles or less than 11 parts by mole, respectively,
relative to 100 parts by mole of the sum total of Sr and Ba. It becomes possible
to provide a translucent ceramic which is inexpensive and is useful as an electrooptical
material, and to provide an electrooptical part (e.g., an optical switch, an
optical shutter) using the translucent ceramic.
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Inventors:
KUBOTA TEPPEI (JP)
Application Number:
PCT/JP2007/060815
Publication Date:
December 06, 2007
Filing Date:
May 28, 2007
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
KUBOTA TEPPEI (JP)
KUBOTA TEPPEI (JP)
International Classes:
C04B35/495; G02F1/355
Foreign References:
| JPH09208394A | 1997-08-12 |
Other References:
MURTY S.N. ET AL.: "Microstructural studies of modified barium strontium niobate (SBN) ceramics", ISAF'94, PROCEEDINGS OF THE IEEE INTERNATIONAL SYMPOSIUM ON APPLICATIONS OF FERROELECTRONICS, 9TH, UNIVERSITY PARK PA, 1994, pages 269 - 272, XP003019626
Attorney, Agent or Firm:
KUNIHIRO, Yasutoshi (14-10 Nishinakajima 5-chome,Yodogawaku,Osaka-shi, Osaka 11, JP)
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