Abstract: The present invention provides a method for preparing fluorine/nitrogen co-doped graphitized carbon microspheres with high volumetric specific capacitance, which is a simple process with moderate reaction conditions, high reproducibility, and low costs. The fluorine/nitrogen co-doped graphitized carbon microspheres prepared according to the present invention have a very high density, exhibit good electrochemical properties in an alkaline environment, as well as very high volumetric specific capacitance and good cyclic stability, and is of great importance in improving the properties of the electrode material for a capacitor.

Abstract: The invention relates to an ultrahard nanotwinned boron nitride bulk material and synthetic method thereof. Particularly, the invention discloses a nanocrystalline cubic boron nitride bulk material containing high density of twins and synthetic method thereof, in which a nanotwinned boron nitride bulk are synthesized from nanospherical boron nitride particles (preferably with a size of 5-70 nm) with onion-like structure as raw materials by using high temperature and high pressure synthesis. As compared with the prior arts, the nanotwinned boron nitride bulk obtained according to the invention has a much higher hardness than that of a normal cubic boron nitride single crystal. The nanotwinned boron nitride bulk has great prospects in applications, such as precision and ultra-precision machining, abrasives, drawing dies, and special optics as well as other fields.

Abstract: Embodiments of double-stator multi-speed motor are described. In embodiments, a motor may include a rotor. The motor may further include an inner stator having a first count of oil distributing ports opened in a surface of the inner stator. The motor may further include an outer stator having a second count of oil distributing ports opened in an inner surface of the outer stator. In some embodiments, the first count is equal to the second count. Other embodiments may be described and/or claimed.

Abstract: The present invention relates to ultrahard nanotwinned diamond bulk materials and synthetic method thereof. In particular, the present invention discloses a diamond bulk material containing high density of nanocrystalline twins and synthetic method thereof, in which a nanotwinned diamond bulk is synthesized from particles of nanospherical onion-like carbon without diamond core (preferably with a size of 5-70 nm) as raw materials by using high temperature and high pressure synthesis. As compared with the prior art, the nanotwinned diamond bulk obtained according to the present invention has a much higher hardness than that of single crystal diamond and that of ultrahard polycrystalline diamond. The nanotwinned diamond bulk has wide prospects in various applications, including geological drilling, machining fields such as high speed cutting and precision and ultra-precision machining, abrasives, drawing dies, and special optics as well as other fields.

Abstract: A method for preparing fluorine/nitrogen co-doped graphitized carbon microspheres with high volumetric specific capacitance, mainly comprises: successively adding a carbon source, a nitrogen source, a fluorine source and a surfactant to a reactor under a nitrogen atmosphere, and stirring for 10-30 minutes before sealing the reactor; placing the reactor into a crucible furnace, heating at 300-600° C., for 6-48 hours, followed by naturally codling the reactor to room temperature and removing the reaction mixture therefrom; successively washing the resulted reaction mixture with absolute ethanol, 0.1 M-5 M diluted hydrochloride acid and distilled water for 3-6 times, filtering, and placing powder thus obtained in a vacuum oven and drying in vacuum at 60-100° C. for 6-12 hours. The present invention provides a simple process with moderate reaction conditions, high reproducibility, and low costs.

Abstract: The invention relates to an ultrahard nanotwinned boron nitride bulk material and synthetic method thereof. Particularly, the invention discloses a nanocrystalline cubic boron nitride bulk material containing high density of twins and synthetic method thereof, in which a nanotwinned boron nitride bulk are synthesized from nanospherical boron nitride particles (preferably with a size of 5-70 nm) with onion-like structure as raw materials by using high temperature and high pressure synthesis. As compared with the prior arts, the nanotwinned boron nitride bulk obtained according to the invention has a much higher hardness than that of a normal cubic boron nitride single crystal. The nanotwinned boron nitride bulk has great prospects in applications, such as precision and ultra-precision machining, abrasives, drawing dies, and special optics as well as other fields.

Abstract: A method for producing low temperature bainite steel containing aluminum may include providing an alloy steel containing aluminum, carbon, chromium, silicon, molybdenum, manganese and nickel, wherein the amount of aluminum is in the range of 0.5 to 1.5 wt. %, and the amount of carbon is in the range of 0.2 to 1.1 wt. %; smelting to convert the alloy steel into a molten steel, followed by subjecting to refining and vacuum degassing, and then subjected to rolling or forging; heating the steel to 880-950° C., cooling the steel to Ms+10° C. at a rate higher than 50° C./min, continuously and slowly cooling the steel from Ms+10° C. to Ms×100×C(wt %)° C., holding the steel at a temperature of 250° C. to 350° C. for 20 to 30 min, and then air cooling the steel to room temperature, holding the steel at a temperature of 180° C. to 280° C. for 60 min, and then air cooling the steel to room temperature.

Abstract: The present invention provides a method for the fabrication of high performance densified nanocrystalline bulk thermoelectric material, comprising: (1) preparing a thermoelectric alloy nanopowders by a ball milling process to achieve an average crystal size of 5-30 nm, and (2) preparing the nanocrystalline bulk thermoelectric material by high pressure sintering at a temperature of 0.25-0.8 Tm under a pressure of 0.8-6.0 GPa for 10-120 minutes, to achieve a relative density of 90-100% and an average grain size of 10-50 nm. The method is easy to operate and allows the production of a thermoelectric material with a ZT value higher than 2. In addition, the method can ensure both good thermoelectric properties and high density, and therefore have important applications for energy industry.