发明名称 |
TRANSPARENT CERAMIC, METHOD FOR MANUFACTURING SAME, AND MAGNETO-OPTICAL DEVICE |
摘要 |
A transparent ceramic having as principal components terbium oxide (Tb 2 O 3 ) in a molar ratio of at least 40%; and at least one oxide selected among an yttrium oxide, a scandium oxide, and a lanthanide rare earth oxide, wherein (1) the crystal structure of the terbium-oxide-based ceramic does not contain a non-cubic-crystal phase, (2) the mean crystal particle diameter is in a range of 0.5 to 100 µm, and (3) the ceramic comprises a sintering auxiliary having no incidence of deposition of a non-cubic-crystal phase in the crystal structure of the terbium-oxide-based ceramic. This transparent ceramic makes it possible to provide a magneto-optical element that performs at least as well as terbium gallium garnet or other existing monocrystal materials. As regards optical loss and optical uniformity, it is possible to provide a functional element for an optical isolator in the infrared region between 500 nm and 1.5 µm having very little scattering and very few birefringence components. |
申请公布号 |
EP2687500(A4) |
申请公布日期 |
2014.10.01 |
申请号 |
EP20120757262 |
申请日期 |
2012.03.15 |
申请人 |
SHIN-ETSU CHEMICAL CO., LTD. |
发明人 |
MAKIKAWA SHINJI;YAHAGI AKIRA;IKESUE AKIO |
分类号 |
C04B35/50;C01F17/00;G02B27/28;G02F1/09 |
主分类号 |
C04B35/50 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|