95results about How to "Increase the number of nuclei" patented technology

The invention discloses a hot rolled bainitic steel rail and a production process. The hot rolled bainitic steel rail comprises the following chemical compositions in percentage by weight: 0.10 to 0.35 percent of C, 0.80 to 2.00 percent of Si, 0.80 to 3.30 percent of Mn, less than 2.00 percent of Cr, 0.0010 to 0.0100 percent of N, 0.01 to 0.10 percent of Nb, 0.02 to 0.2 percent of V, 0.005 to 0.06 percent of Ti, 0.10 to 0.40 percent of Mo, less than 0.00005 percent of H and the balance of Fe and inevitable impurities. The process is characterized in that: a hole pattern method is adopted for the rough rolling of the steel rail, a universal method is adopted for the precision rolling of the steel rail, the rolling interval of adjacent passes in the rough rolling is controlled to more than 5 seconds and not more than 35 seconds, and the steel rail after the rolling is naturally cooled in the air to room temperature. The production process limits the size of residual austnesite in M-A islands and between lath bainitic ferrite; the proportion of the lath bainitic ferrite is over 75 percent; comprehensive indexes of performance such as specific elongation and the like are improved; andthe production process can be also applied to turnout bainitic steel rails and bainitic AT rails.

The invention provides a variable valency metal catalyzed and doped tungsten bronze Ax-MyWO3 nano-short rod particle and a preparation method thereof. The method consists of: firstly making solid colloidal tungstic acid as a tungsten source, mixing the tungsten source with an M source, an appropriate solvent and an inducing agent, adding a proper amount of a variable valency metal A salt, and carrying out thermal reaction to synthesize the variable valency metal catalyzed and doped tungsten bronze Ax-MyWO3 multifunctional nanoparticle. The synthesized Ax-MyWO3 nano-short rod particle has excellent visible light permeability and near-infrared shielding performance and photothermal conversion ability, can be widely used for preparation of glass transparent thermal insulation paint, transparent and heat insulation compounds, photothermal absorbing coatings, solar thermal collectors, solar water heater coatings, heating fiber and photothermal therapy nanoparticles, etc. At the same time, the synthesized variable valency metal catalyzed and doped tungsten bronze Ax-MyWO3 nano-short rod particle also has excellent photocatalysis ability, and can be widely applied to the photocatalytic degradation field of organic pollutants.

The invention relates to a carbonizer for continuously synthesizing calcium carbonate and a production method of calcium carbonate, an input port of calcium hydroxide, an input port of carbon dioxide are provided on the body of the carbonizer, a discharge port is provided at the bottom of the carbonizer, the input port of calcium hydroxide and the input port of carbon dioxide are positioned at the top of the carbonizer body, the transverse trays with displacement from each other are uniformly arranged from the lower part to the bottom of two input ports in the body of the carbonizer, a layout of a S shape backflow baffle plate or a snaky shape backflow baffle plate is used between the adjacent trays. The calcium hydroxide slurry is a fluid suspension, and enables an equidirectional flow with carbon dioxide on the transverse trays between the trays, the calcium hydroxide slurry enters to the next tray from an outlet, three phases of gas, liquid and solid phase are reacted to generate precipitated calcium carbonate, the reacted material-carbonized boiled slurry is flowed out from the outlet of lower part of the reactor. The product has the advantages of adjustable particle size, narrow grain size distribution and stable quality, dispersibility, stability and alkali efflorescence are improved; the invention has the advantages of less equipment investment, short reaction time, less energy consumption, low cost, and the product enables continuous production.