Entity

Time filter

Source Type

Ōsaka, Japan

Yasuhara R.,Japan National Institute for Fusion Science | Furuse H.,Japan Institute for Laser Technology | Iwamoto A.,Japan National Institute for Fusion Science | Kawanaka J.,Osaka University | Yanagitani T.,Konoshima Chemical Co.
Optics Express | Year: 2012

The temperature dependence of the thermo-optic effect in cryogenically cooled Yb:YAG ceramics was evaluated by measuring the thermo-optic coefficient (the derivative of refractive index with respect to temperature, i.e., dn/dT), thermal expansion coefficient (α), and thermal conductivity (κ) between 70 and 300 K. These parameters significantly improved at low temperature. Observed values indicated that a laser gain medium cooled to 70 K can sustain a thermal load up to 20 times higher than that at 300 K, for comparable thermo-optic effects. To our best knowledge, this is the first quantitative evaluation of the improvement in thermo-optic characteristics of cryogenically cooled Yb:YAG ceramics. © 2012 Optical Society of America. Source


Trademark
Konoshima Chemical Co. | Date: 2016-03-29

Industrial chemicals; magnesium hydroxide; calcium carbonate; magnesium carbonate; magnesium oxide.


Provided are magnesium oxide particles which are good in dispersibility in a resin or rubber, can function sufficiently as an acid acceptor or scorch retarder, and do not lower, even after combined with a resin or rubber, material properties thereof; a resin composition; a rubber composition; and a shaped body. The magnesium oxide particles satisfying the following (A) to (C): (A) an average particle size is 5 m or less; (B) a BET specific surface area is 20 m


Trademark
Konoshima Chemical Co. | Date: 2016-03-24

Industrial chemicals; magnesium oxide; magnesium hydroxide; magnesium carbonate; calcium carbonate.


Patent
Konoshima Chemical Co. | Date: 2013-08-12

Provided are a flame retardant which is good in dispersibility in an organic polymeric material, and does not lower, even after mixed with an organic polymeric material, material properties thereof; a flame retardant composition; and a shaped body. The flame retardant of the present invention includes magnesium hydroxide particles subjected to a surface treatment, the particles satisfying the following (A) to (D): (A) an average particle size is 2 m or less according to a laser diffraction method; (B) a BET specific surface area is 3 to 15 m

Discover hidden collaborations