摘要:
A solid solution material of rare earth element fluoride (a polycrystl and/or a single crystal), characterized in that it comprises a combination of a plurality of rare earth element fluorides exhibiting phase transition and having different ionic radii and has no phase transition; a rare earth element fluoride solid solution material (a polycrystl and/or a single crystal), characterized in that it is represented by (REyRE'1-y)F3 (0.0000
摘要:
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.
摘要:
A method for preparing tantalum oxide and/or niobium oxide, characterized in that it comprises adding a basic aqueous solution to an aqueous solution of tantalum fluoride salt and/or niobium fluoride salt, to form tantalum hydroxide and/or niobium hydroxide, and then firing said tantalum hydroxide and/or niobium hydroxide. The above method allows the preparation of the tantalum oxide and/or niobium oxide in the state of a needle crystal or columnar crystal, not of a spherical crystal or an assemblage form.
摘要:
In the manufacturing method of hexafluorophosphate (MPF 6 : M = Li, Na, K, Rb, Cs, NH 4 , and Ag) of the present invention, at least a H x PO y F z aqueous solution, a hydrofluoric acid aqueous solution, and MF · r (HF) are used as raw materials (wherein, r ‰¥ 0, 0 ‰¤ x ‰¤ 3, 0 ‰¤ y ‰¤ 4, and 0 ‰¤ z ‰¤ 6). According to the above description, a manufacturing method of hexafluorophosphate can be provided which is capable of manufacturing hexafluorophosphate (GPF 6 : G = Li, Na, K, Rb, Cs, NH 4 , 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.
摘要:
A process for phosphorus pentafluoride production by which high-purity phosphorus pentafluoride can be produced by a simple and economical procedure without the need of a large-scale purification apparatus or high-pressure apparatus and without generating a large amount of a by-product gas requiring a special discharge-gas treatment. The process for phosphorus pentafluoride production is characterized by introducing hydrogen fluoride and a hexafluorophosphate (MPF 6 ) into a vessel and reacting them according to the reaction shown by the scheme (1) to yield phosphorus pentafluoride. MPF 6 + uHF †’ PF 5 + MF r(HF) (Scheme 1) In the scheme, M is at least any one of Li, Na, K, Rb, Cs, NH 4 , and Ag; 0 ‰¤ r ‰¤ u; and the HF is used in an amount not smaller than the stoichiometric amount.