5 results about "Lutetium" patented technology

The application relates to the technical field of ceramic compositions, and discloses an X7R type MLCC anti-aging ceramic dielectric material and a preparation method thereof, which comprises barium titanate, magnesium oxide, lutetium oxide, manganese dioxide and glass frit; wherein magnesium ions and lutetium ions occupy titanium positions on the surface layer of the barium titanate crystal lattice and combine with oxygen vacancies to generate ternary composite defect clusters; the ternary composite defect clusters are locally distributed in the shell layer region of the barium titanate crystal grain and are used for improving the long-range electric migration activation energy of the oxygen vacancies; through the construction of an ion and electron double shielding network, the directional migration of the oxygen vacancies under high-temperature direct current bias is inhibited, the contradiction between the conventional anti-aging means and the dielectric constant maintenance is solved, the high dielectric activity of the polarization area of the barium titanate is ensured, the high-temperature insulation reliability of the ceramic dielectric material is enhanced, and the capacitance aging process is delayed.

The present invention provides a defect-controlled lutetium silicate crystal and a method for producing the same. A lutetium silicate crystal according to an embodiment of the present invention is characterized by containing at least lutetium (Lu), silicon (Si), oxygen (O), and hydrogen (H), having the same crystal structure as a crystal represented by Lu2SiO5, and having an absorption peak derived from an OH group in a wave number range of 3000 cm-1 or more and 3800 cm-1 or less in an infrared absorption spectrum.

This invention discloses a divalent rare earth-graphyne composite material, its preparation method, and its application in thermocatalytic ammonia production, belonging to the field of catalyst materials technology. The divalent rare earth-graphyne composite material comprises rare earth ions, iodide ions, and graphyne material. The rare earth ions are selected from at least one divalent ion of lanthanum, cerium, praseodymium, neodymium, promethium, samarium, europium, gadolinium, terbium, dysprosium, holmium, erbium, thulium, ytterbium, lutetium, scandium, and yttrium. The rare earth ions and iodide ions exist on the surface of the graphyne material in the form of nanoparticles. This divalent rare earth-graphyne composite material achieves thermocatalytic ammonia production under mild conditions through the interaction of rare earth nanoparticles and oxygen-containing functional groups on the graphyne surface, and is expected to become a new generation of high-performance thermocatalytic ammonia production catalyst.

A method for purifying lutetium includes providing a solid composition comprising ytterbium and lutetium and subliming or distilling ytterbium from the solid composition at a temperature of about 1196° C. to about 3000° C. to leave a lutetium composition comprising a higher weight percentage of lutetium than was present in the solid composition.

This invention belongs to the field of analytical chemistry detection, specifically relating to a lutetium [ 177 A method for detecting the radiochemical purity of lutetium [Lu] conjugates. The method employs high-performance liquid chromatography (HPLC) with a tandem radioactive detector. The mobile phase comprises mobile phase A and mobile phase B, wherein mobile phase A is phosphoric acid and a phosphate buffer, and mobile phase B is selected as acetonitrile and / or methanol. This invention's detection method can accurately detect lutetium [Lu]. 177 The radiochemical purity of the Lu conjugate is high, and it is stable, reliable, and highly sensitive, especially for lutetium [ 177 The quality control and research of Lu conjugate products are of great significance.