445 results about "Liquid alloy" patented technology

The invention relates to Group 1 metal / silica gel compositions comprising silica gel and an alkali metal or an alkali metal alloy. The compositions of the inventions are described as Stage 0, I, II, and III materials. These materials differ in their preparation and chemical reactivity. Each successive stage may be prepared directly using the methods described below or from an earlier stage material. Stage 0 materials may, for example, be prepared using liquid alloys of Na and K which are rapidly absorbed by silica gel (porous SiO2) under isothermal conditions, preferably at or just above room temperature, to form loose black powders that retain much of the reducing ability of the parent metals. When the low melting Group 1 metals are absorbed into the silica gel, a mild exothermic reaction produces Stage I material, loose black powders that are indefinitely stable in dry air. Subsequent heating to 400° C. produces Stage II materials, which are also loose black powders. Further heating above 400° C. forms Stage III material with release of some Group 1 metal. It is believed that Stage I, II and III materials represent reductions of the silica gel after absorption of the Group 1 metal. Preferred Group 1 metal / silica gel compositions of the invention are those containing sodium, potassium, or sodium-potassium alloys with sodium and sodium-potassium alloys being most preferred. Each stage of the Group 1 metal / silica gel composition of the invention may be used as a reducing agent reacting with a number of reducible organic materials in the same manner known for alkali metals and their alloys.

The invention relates to an active aluminum-rich alloy for preparing high purity hydrogen through hydrolysis. The alloy is characterized in that the alloy which is composed of four elements of Al, Ga, In and Sn comprises the following two phases: an Al solid solution and GaIn3Sn. A preparation method of the alloy concretely comprises the following steps: 1, melting the alloy to form a molten alloy by adopting a vacuum induction furnace, wherein the vacuum degree of the vacuum induction furnace is 10<-2>-10<-3>Pa; and 2, stirring the molten alloy by adopting an electromagnetic stirring technology, casting the molten alloy to a water-cooled copper mold, and solidifying, wherein the cooling rate is 101-103DEG C / s. The alloy has the advantages of high hydrogen yield, no pollution, low cost, simple preparation method, convenient operation and the like.

By entering a low acceleration Si ion beam of 500 V or lower or a low acceleration Si ion beam of 500 V-2000 V having been slanted such that an injection depth becomes shallow, which has been mass-separated from a liquid alloy ion source containing Si by a mass separator and converged by an ion optical system, the amplitude defect near a surface of the Mo / Si multilayer film or the Mo2C / Si multilayer film is removed by a physical sputter or a gas assist etching such that an interlayer of the Mo / Si multilayer film or the Mo2C / Si multilayer film in a lower layer is not destroyed.