Niobium tungsten alloy is a niobium alloy formed by adding a certain amount of tungsten and other elements to niobium substrate, tungsten and niobium form an infinite solid solution. 1)

Boron nitride in hexagonal form is commonly known as "white graphite", it is a white powder with the same hexagonal layered crystal structure as graphite. Its melting point is 3000°C at high pressure nitrogen, it sublimates and partially decomposes at 2500°C under normal pressure, and its theoretical density is 2.37g/cm³. Hexagonal boron nitride is a good conductor of heat and an electrical insulator, and has excellent chemical stability. It is non-wetting and non-reactive with most metal melts such as steel, stainless steel, aluminum, iron, and copper, and has good lubricating properties. Therefore, hexagonal boron nitride is widely used in the ceramic industry, such as pot handles, evaporation boats for aluminum coating, circuit board substrates, and high-temperature lubricants, where it is used in large quantities to prepare hexagonal boron nitride; it can also be used as a structural material for atomic reactors and rocket engine assemblies.

An international team of researchers from the United States, Japan and South Korea created five new isotopes, namely plutonium-182, plutonium-183, ytterbium-186, ytterbium-187 and lutetium-190. These elements may have appeared on Earth for the first time, helping scientists reveal secrets about our planet and the universe. The paper is published in year of 2024 of the 5th issue of the journal 《Physical Review Letters》 .

The porous tantalum material used in surgical implants is mainly used for the repair and reconstruction of surgical bone defects. Tantalum metal is used because tantalum is a refractory metal, which is non-toxic, harmless and has no side effects on human body, and has excellent biocompatibility. While porous tantalum material has good porosity and uniform distribution, which is consistent with the growth of human bone tissue. Therefore, as a bio-porous implant material, it is widely used in the surgical field.

The refractory metals used in engine thrust chamber mainly include tungsten alloy, molybdenum alloy, tantalum alloy and niobium alloy

When the temperature drops close to absolute zero, some substances undergo a sudden chemical change and become a "superconductor" with almost no resistance. The temperature at which matter begins to take on this strange "superconducting" property is called the critical temperature. Needless to say, the critical temperature of various substances is not the same.

The method of determining niobium content in aviation material Ti45Nb titanium alloy is to dissolve insoluble test material with mixed acid of hydrochloric acid, nitric acid and hydrofluoric acid. In hydrofluoric acid medium, titanium and aluminum ions are formed stable complex by hydrofluoric acid, niobium and tetraphenylarsenic chloride hydrochloride are completely precipitated, and trace magnesium ions are soluble precipitated. Tartaric acid is used to prevent the precipitation of hydrated oxides of high-priced metal ions, after filtration, the magnesium precipitation is washed and dissolved, and finally the precipitation is dried, ash, and burned into niobium pentaoxide, and the niobium content in the alloy is calculated by weighing and calculating. The method of the invention has an alloy material with a mass fraction of 40.0% ~ 50.0% that can determine the niobium content. It has the advantages of simple operation, high accuracy, small error and good stability.

The preparation method of wide plate width barrier layer Niobium Sheet for superconducting wire includes: first, the Niobium Plate is rolled along a fire after reversing rolling, and then the niobium plate is obtained by grinding, sanding, pickling, shearing and vacuum annealing; Second, the niobium plate with tension rolling, and then in turn for grinding, sanding, pickling, shearing and vacuum annealing heat treatment to get wide plate width barrier layer niobium sheet

Method of producing superconducting niobium pipe. It is characterized by the following steps: taking cylindrical high-purity niobium ingots to drill holes to get hollow ingots, extruding the hollow ingots at room temperature to get tube billets, and then rolling the tube billets to get finished niobium tube.