Shin-etsu Chemical Co., Ltd.

Schott Ag

Other

Seiko Epson Corporation

Akio Ikesue

Shinji Makikawa

Yvonne Menke

Ulrich Peuchert

Takashi Endo

Masanori Ikari

Yoshihiro Nojima

Akira Yahagi

A phosphor includes a sintered body of a ceramic material. The sintered body contains Ce:YAlOas a main phase and a ceramic material as a subphase. The ceramic material has a refractive index different from that of the main phase. The sintered body has a crystal grain boundary and a void at the crystal grain boundary.

Phosphor, wavelength conversion element, light source device, and projector

A transparent ceramic having terbium oxide (TbO) 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 &#x3bc;m, 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 a magneto-optical element that performs at least as well as terbium gallium garnet or other existing monocrystal materials. It also makes a functional element for an optical isolator in the infrared region between 500 nm and 1.5 &#x3bc;m having very little scattering and very few birefringence components.

Transparent ceramic, method for manufacturing same, and magneto-optical device

Provided is a method of manufacturing a transparent sesquioxide sintered body by which a transparent MOtype sesquioxide sintered body can be manufactured. A powder including particles of an oxide of at least one rare earth element selected from Y, Sc or lanthanide elements and Zr oxide particles is prepared as a raw material powder, wherein in the particle size distribution of the rare earth element oxide particles, or in the particle size distribution of secondary particles in the case where the rare earth element oxide particles are agglomerated to form the secondary particles, the particle diameter Dvalue at which the cumulative particle amount from the minimum particle size side is 2.5% based on the total particle amount is in the range from 180 nm to 2000 nm, inclusive. The raw material powder is press molded into a predetermined shape, followed by sintering.

Method of manufacturing transparent sesquioxide sintered body, and transparent sesquioxide sintered body manufactured by the method

The method of making a transparent ceramic includes making a molded body from a powder mixture of starting materials, which include one or more sintering aids. The sintering aids can include SiO, TiO, ZrO, HfO, AlOand/or fluorides. The transparent ceramic is made by pre-sintering the molded body at temperatures between 500&#xb0; C. to 900&#xb0; C., subsequently sintering in vacuum at temperatures between 1400&#xb0; C. and 1900&#xb0; C. and then pressurizing the sintered molded body at a pressure of from 10 to 198 MPa followed by annealing. The optoceramic material contains crystals with a stoichiometry of ABBDE, wherein &#x2212;1.15&#x2266;x&#x2266;+1.1, 0&#x2266;y&#x2266;3, 0&#x2266;z&#x2266;1.6 and 3x+4y+5z=8; and wherein A is a trivalent rare earth cation, B is a tetravalent cation, D is a pentavalent cation and E is a divalent anion.

Method of producing transparent ceramics

The optoceramics are transparent to visible light and/or infrared radiation. The optoceramics each consist of a crystal matrix, i.e. of polycrystalline material, wherein at least 95% by weight, preferably at least 98% by weight, of the single crystallites have a cubic pyrochlore or a fluorite structure. Refractive, transmissive or diffractive optical elements made with the optoceramics, their uses and an optical imaging system comprising at least one of the optical elements are also disclosed. Methods of manufacturing the optoceramics are described.

Passive optoceramics with cubic crystal structure, process for manufacturing the same and their uses

The present invention provides a composite laser element that solves the problems encountered with a conventional laser medium composed of an Nd:YAG single crystal or polycrystal, and exhibits excellent performance as a laser medium. The invention relates to a laser element in which two or more crystal materials are joined, wherein (1) at least one of the crystal materials is a transparent crystal material capable of laser oscillation, including a laser active element in a matrix crystal, and (2) the transparent crystal material capable of laser oscillation and/or a second crystal body joined thereto is a polycrystal.

Growing community of inventors

Nagoya, Japan

Akio Ikesue