Stella Chemifa Kabushiki Kaisha

Tohoku Techno Arch Co., Ltd.

Stella Chemifa Corporation

Furukawa Co., Ltd.

Kenji Aoki

Masahide Waki

Hirohisa Kikuyama

Shinji Hashiguchi

Akira Yoshikawa

Tsuguo Fukuda

Kei Kamada

Hiroto Izumi

Hirofumi Yazaki

Masatsugu Kawawaki

Yuko Murakami

Tetsuo Nishida

Yasutaka Tashiro

Kazuhiro Miyamoto

Tomohiko Satonaga

Hiraku Ogino

The present invention provides an oxide-base scintillator single crystal having an extremely large energy of light emission, adoptable to X-ray CT and radioactive ray transmission inspection apparatus, and more specifically to provide a Pr-containing, garnet-type oxide single crystal, a Pr-containing perovskite-type oxide single crystal, and a Pr-containing silicate oxide single crystal allowing detection therefrom light emission supposedly ascribable to 5d-4f transition of Pr.

Pr-containing scintillator single crystal, method of manufacturing the same, radiation detector, and inspection apparatus

In the manufacturing method of hexafluorophosphate (MPF: M=Li, Na, K, Rb, Cs, NH, and Ag) of the present invention, at least a HPOFaqueous solution, a hydrofluoric acid aqueous solution, and MF.r (HF) are used as raw materials (wherein, r&#x2267;0, 0&#x2266;x&#x2266;3, 0&#x2266;y&#x2266;4, and 0&#x2266;z&#x2266;6). According to the above description, a manufacturing method of hexafluorophosphate can be provided which is capable of manufacturing hexafluorophosphate (GPF: G=Li, Na, K, Rb, Cs, NH, and Ag) at a low cost in which the raw materials can be easily obtained, the control of the reaction is possible, and the workability is excellent.

Manufacturing method of hexafluorophosphate

A rare earth fluoride solid solution material (polycrystal and/or single crystal) characterized in that the material is obtained by mutually combining a plurality of rare earth fluorides having phase transitions and having different ion radii, respectively, so that the rare earth fluoride solid solution material is free of phase transitions. A rare earth fluoride solid solution material (polycrystal and/or single crystal) characterized in that the material is represented by (RERE')F(0.0000&#x3c;y&#x3c;1.0000), wherein RE represents one or two or more selected from Sm, Eu, and Gd, and RE&#x2032; represents one or two or more selected from Er, Tm, Yb, Lu, and Y. A rare earth fluoride solid solution material (polycrystal and/or single crystal) represented by MRERE&#x2032;F., wherein RE is one or two or more selected from Ce, Pr, Nd, Eu, Tb, Ho, Er, Tm, or Yb, RE&#x2032; is one or two or more selected from La, Sm, Gd, Dy, Lu, Y, and Sc, and M is one or more of Mg, Ca, Sr, and Ba.

Solid solution material of rare earth element fluoride (polycrystal and single crystal), and method for preparation thereof, and radiation detector and test device

Provided is a method for purifying a quaternary alkyl ammonium salt enabling the obtainment of a particulate quaternary alkyl ammonium salt having a low water content at a high yield which is suitably used as an electrolyte in an electrolytic solution. The method for the purification of a quaternary alkyl ammonium salt comprises dispersing a quaternary alkyl ammonium salt to be purified into an organic solvent to allow it to form a suspension there. The alkyl groups constituting the quaternary alkyl ammonium salt have 1 to 5 carbon atoms each. The quaternary alkyl ammonium salt to be purified is dispersed into the organic solvent to make a suspension, and then the particles are washed with an alcohol solvent.

Method of purifying quaternary alkyl ammonium salt and quaternary alkyl ammonium salt

An object of the present invention is to provide a method for purifying a highly pure niobium compound and/or tantalum compound, the method enabling the purification of a highly pure niobium compound and tantalum compound in a simplified manner at a low cost. The object is met by providing a method comprising adding an organic solvent to an aqueous solution containing a niobium compound and/or tantalum compound together with impurities, and then performing extraction via the solution. A niobium compound and/or tantalum compound dissolved in a solution is allowed to precipitate, and said aqueous solution is obtained by dissolving the precipitate in water.

Purification method for producing high purity niobium compound and/or tantalum compound

The present invention provides a method enabling the high purification of a niobium compound and/or tantalum compound in a simplified manner at a low cost. This is accomplished by providing a method enabling the high purification of a niobium compound and/or tantalum compound comprising the steps of preparing a solution containing niobium and/or tantalum, allowing a precipitate comprising niobium and/or tantalum to develop, separating the precipitate by filtration from the filtrate, converting the precipitate to a liquid melt or taking the filtrate, and separating a niobium compound from a tantalum compound or vice versa by utilizing the difference in solubility to the solvent between the niobium compound and the tantalum compound.

Growing community of inventors

Osaka, Japan

Kenji Aoki