National Institute of Advanced Industrial Science and Technology

Nihon Yamamura Glass Co., Ltd.

University of Tsukuba

Daico Mfg Co., Ltd.

Naoyuki Kitamura

Junji Nishii

Hidekazu Hashima

Kohei Fukumi

Tatsuo Hidaka

Junichi Nakamura

Hiroaki Kumada

Yoshitaka Mayumi

Tetsuyuki Nakamura

Takeshi Ikeda

Takuro Ikeda

As a sintered body for a radiation shielding material, which can effectively shield mainly low-energy-level neutrons, that is, thermal neutrons and lower, slow neutrons, and has excellent physical properties such as bending strength and Vickers hardness, leading to high machining strength, a sintered body for a radiation shielding material comprising LiF ranging between 99 wt. % to 5 wt. %, and one or more fluorides selected from among MgF, CaF, AlF, KF, NaF, and/or YFranging between 1 wt. % to 95 wt. %, having physical properties of a relative density of 92% or more, a bending strength of 50 MPa or more, and a Vickers hardness of 100 or more, is provided.

Sintered body for radiation shielding material, radiation shielding material, and method for producing the same

A PO&#x2014;BaO&#x2014;ZnO&#x2014;NbOtype optical glass contains 25-50 wt. % PO, 15-35 wt. % BaO, 1-25 wt. ZnO, and 3-10 wt. % NbO. The optical glass has a high refractive index (particularly preferably the refractive index nof 1.6 or more), low dispersion (an Abbe number &#x3c5;of 42 or more), a low deformation point, and improved resistance to devitrification upon molding, and is suitable for precision-mold press molding or other molding processes and also suitable for transfer of a fine structure.

Optical glass

An optical glass having a high refractive index (particularly preferably a refractive index of 1.6 or more), low dispersion (an Abbe number of 45 or more), a low deformation point, and improved resistance to devitrification upon molding, and suitable for precision-mold press molding or other molding processes and also suitable for transfer of a fine structure is provided. The optical glass contains 1.0-4.5 wt. % SiO, 30.5-50.0 wt. % BO, 1.1-8.0 wt. % LiO, 10.1-19.5 wt. % BaO, 15.5-30.0 wt. % ZnO, 3.0-15.0 wt. % YO, and 10.0-19.5 wt. % LaO.

Growing community of inventors

Osaka, Japan

Naoyuki Kitamura