254 results about "Mechanical milling" patented technology

The present invention relates to a process for producing sulfide glass or sulfide glass ceramic each capable of conducting a lithium ion, comprising subjecting metallic lithium, sulfur as a simple substance and phosphorus as a simple substance as starting raw materials, which constitute the sulfide glass and sulfide glass ceramic, to mechanical milling to thereby convert them into sulfide glass or sulfide glass ceramic; and a whole solid type cell using the above-mentioned sulfide glass ceramic as a solid electrolyte. According to the present invention, it is made possible to produce sulfide glass and sulfide glass ceramic which are each capable of conducting a lithium ion and which have high electroconductivity at room temperature by a simple and advantageous process from starting raw materials being easily available and inexpensive.

The invention provides a process for producing a sulfide-based solid electrolyte, the process having: a raw material composition preparation step for preparing a raw material composition containing at least sulfur (S), an adhesion inhibitor addition step for adding to the raw material composition an adhesion inhibitor that inhibits formation of adhered substances including the unreacted raw material composition, on the inner surface of a milling pot during mechanical milling, and a vitrification step for synthesizing sulfide-based glass by carrying out mechanical milling on the raw material composition to which the adhesion inhibitor has been added.

An electrode composition that includes the combination of a finely ground silicon mixture, a partially carbonized polymeric material, and a buffering agent is disclosed. The silicon mixture can be formed by mechanical milling of crystalline silicon to create amorphous silicon particles, while the polymeric material can be formed from polymers such as polystyrene, polyethylene, polypropylene, polyacrylonitrile, polyvinyl chloride, polyethylene oxide that are heated under inert gasses to slightly decompose the polymers.

Composite silicon based materials are described that are effective active materials for lithium ion batteries. The composite materials comprise processed, e.g., high energy mechanically milled, silicon suboxide and graphitic carbon in which at least a portion of the graphitic carbon is exfoliated into graphene sheets. The composite materials have a relatively large surface area, a high specific capacity against lithium, and good cycling with lithium metal oxide cathode materials. The composite materials can be effectively formed with a two step high energy mechanical milling process. In the first milling process, silicon suboxide can be milled to form processed silicon suboxide, which may or may not exhibit crystalline silicon x-ray diffraction. In the second milling step, the processed silicon suboxide is milled with graphitic carbon. Composite materials with a high specific capacity and good cycling can be obtained in particular with balancing of the processing conditions.

In a non-aqueous electrolyte secondary battery, in order to adjust a cathode active material in which guest cation such as Na and Li is included, alkaline metal fluoride which is expressed by a general formula AF and transition metal fluoride which is expressed by a formula M′ F₂ are subjected to a mechanical milling process to produce metal fluoride compound AM′ F₃. The mechanical milling process desirably uses a planetary ball mill.

The invention discloses hybridized particles, a polymer-based composite material, their preparation methods and a use of the polymer-based composite material. The hybridized particles comprise insulating ceramic particles and conductive microparticles loaded on the surfaces of the insulating ceramic particles. The conductive microparticles are granularly and discretely distributed on the surfaces of the insulating ceramic particles. The preparation method of the hybridized particles adopts an in-situ chemical-reduction technology, a sol-gel technology, an in-situ polymerization technology, a high-temperature heat treatment technology or a mechanical milling technology. The polymer-based composite material comprises the hybridized particles and a polymer filled with the hybridized particles. The polymer-based composite material comprises 20-80wt% of the hybridized particles. The hybridized particles have stable structures and stable performances. The polymer-based composite material has the excellent performances such as high dielectric constant, low dielectric loss and stable performances. The preparation methods of the hybridized particle and the polymer-based composite material have the advantages of simple process, easy control of conditions, high production efficiency and industrial production applicability.

The invention relates to a graphite silicon-based composite anode material for a lithium ion battery and a preparation method thereof. The graphite silicon-based composite anode material comprises a nano-silicon cracked carbon composite material, graphite and a carbon material coating layer. The preparation method comprises the following steps: firstly, nano-silicon is obtained by a high-energy wet mechanical milling method; secondly, nano-silicon and a polymer with high carbon residue are compounded by dispersion polymerization so as to form a polymer/nano-silicon composite microsphere emulsion with nano-silicon inlaid in polymeric microspheres; thirdly, the microsphere emulsion and graphite are compounded; and finally, solid-phase coating is carried out by the use of an organic carbon source, and heat treatment is conducted to obtain the graphite silicon-based composite anode material for a lithium ion battery. By the above method, the problem that nano-silicon is liable to agglomeration, especially agglomeration of nano-silicon from a liquid disperse state to a dry state, due to low granularity and high specific surface energy is solved. The anode material has characteristics of high specific capacity (greater than 550mAh/g), high initial charge discharge efficiency (greater than 80%) and high conductivity.

Anisotropic rare earth-iron based resin bonded magnet comprises: [1] a continuous phase including: (1) a spherical Sm₂Fe₁₇N₃ based magnetic material covered with epoxy oligomer where its average particle size is 1 to 10 μm, its average aspect ratio AR_ave is 0.8 or more, and mechanical milling is not applied after Sm—Fe alloy is nitrided; (2) a linear polymer with active hydrogen group reacting to the oligomer; and (3) additive; and [2] a discontinuous phase being an Nd₂Fe₁₄B based magnetic material coated with the epoxy oligomer where its average particle size is 50 to 150 μm, and its average aspect ratio AR_ave is 0.65 or more, further satisfying: [3] the air-gap ratio of a granular compound on the phases is 5% or less; and [4] a composition where crosslinking agent with 10 μm or less is adhered on the granular compound is formed at 50 MPa or less.

The invention relates to a preparing method for fine sheet metal magnetically soft alloy powder and belongs to the technical field of metal and alloy powder preparation. The method comprises the steps that two or three of Fe, Si, Al, Ni and Mo are selected as raw materials to carry out alloy distributing; a medium-frequency induction furnace is adopted for carrying out alloy smelting; a two-flow atomization method is adopted for carrying out atomizing on a melt, and alloy powder approximately spherical is prepared; by means of mechanical milling, flattening is carried out on the alloy powder; annealing treatment is carried out on the obtained sheet powder, and by means of an ultrasonic vibrating sieve, the fine sheet metal magnetically soft alloy powder is prepared. The powder prepared through the method, the granularity ranges from 10 micrometers to 100 micrometers, the average thickness ranges from 0.1 micrometer to 5 micrometer, the radial thickness ratio ranges from 50 to 500, and the powder flattening rate reaches 90%. According to the method, the powder preparing process is simple, the production efficiency is high, the production cost is low, the quality of the magnetically soft powder core can be effectively improved, and the manufacturing cost is reduced.

The invention provides a magnesium-based hydrogen storage alloy with a long period structure and a preparation method thereof. The magnesium-based hydrogen storage alloy has the chemical composition of Mg100-(2x-4x)Nix-3xYx (x is not less than 2 and not more than 6), and has a 18R and 14H long period stacking ordered structure. The preparation method comprises the following steps of: taking pure magnesium and Ni-Y intermediate alloys according to the chemical composition, carrying out induction smelting to obtain magnesium-based alloy cast ingots, mechanically crushing, and then carrying out high-energy mechanical milling to finally obtain the magnesium-based hydrogen storage alloy. The magnesium-based hydrogen storage alloy provided by the invention has good activation property and hydriding/dehydriding kinetics property; Ni atoms and Y atoms in the long period structure form Mg2NiHx and YH2-3 in the hydriding process and are evenly distributed among Mg particles in nanoscale, therefore, the hydrogen storage property of the Mg-based hydrogen storage alloy is greatly improved. The preparation method provided by the invention is simple and applicable to industrialized production.

The invention discloses a porous silicon material, and a preparation method and an application thereof. The porous silicon material is mainly prepared by mechanical milling and acid etching of metallurgical iron-silicon alloy as a raw material; the dimension of the porous silicon material is in micron/submicron level; the porous silicon material has a diamond structure, belongs to an Fd-3m (227) space group, and has a reaction phase which can react with lithium (Li); a large number of hierarchical porous structures with different dimensions are evenly distributed in the surface and the inside of the porous silicon material; the porous silicon material can be used as a lithium ion battery anode active material, and shows the characteristics of high (first) coulombic efficiency, high capacity, excellent cycling stability and the like when applied to a lithium ion battery; meanwhile, the preparation technology of the porous silicon material is simple, and can be carried out only by conventional equipment; the used raw materials are cheap and available; the technological process is easy to control; and the porous silicon material is good in repeatability, high in productivity, stable in product quality and suitable for large-scale production.

The invention discloses a method for preparing silicon carbide powder by using crystalline silicon cutting waste mortar. The method comprises following concrete processes: firstly, adding an organic solvent to the crystalline silicon cutting waste mortar, dissolving polyethylene glycol in the waste mortar; filtering and drying a filter cake; then grinding the filter cake into powder; adding dilute hydrochloric acid to react, filtering after the reaction is complete, and removing trace metal impurities, so as to obtain mixed powder of silicon and silicon carbide; then adding excessive carbon source to the mixed powder; evenly mixing the powder in a mechanical milling manner; finally, carrying out thermal treatment on the mixed powder in vacuum or inert atmosphere within a certain temperature range, so that the silicon and the carbon are subjected to carbonization reaction; removing residual carbon in air after the reaction is complete; finally obtaining high-purity silicon carbide powder. By adopting the method, the complicated technological process in the traditional method for recovering the crystalline silicon cutting waste mortar is simplified; finally the silicon in the crystalline silicon cutting waste mortar is completely converted into silicon carbon by a simpler method; the resources are recycled; environmental pollution is also reduced.

A terminal for a Li-ion battery cell utilizes a bimetallic strip formed from the materials used as the Li-ion cell current collectors, such as copper and aluminum. The bimetallic strip is to be used as, at least one, of the Li-ion pouch cell terminals. At least one portion of the bimetallic strip has one of the metallic components removed by such means as chemical or electrochemical etching, mechanical milling, skiving, or grinding, the remaining component being connected to the collector and the other end of the strip serving as the terminal.

The invention provides an integral manufacturing method for the tube section of a large storage box based on numerical control mirror milling. The method comprises the following steps: (1) milling the upper faces and the lower faces of wall boards of the storage box in a flat board mechanical milling mode through a numerical control wall board milling machine; (2) bending and forming the wall boards through a filling rolling and bending forming method; (3) welding the bent and formed wall boards into the tube section through friction stir welding; (4) carrying out mechanical milling on the tube section integrally, and gridding of the wall boards forming the tube section is machined through numerical control mirror milling. The tube section integral mirror milling is adopted in the integral manufacturing method to replace traditional chemical milling, flat plate mechanical milling and the single curve wall board numerical control gridding milling technology, the manufacturing method of the tube section of the gridding storage box that first a tube is formed and then the tube is milled is achieved, the demand is met, and the machining precision and the machining efficiency of the tube section of the storage box are improved.

The invention provides a de-burring method for a high-frequency printed circuit board. The method comprises the following steps of providing a multi-layer ceramic base printed circuit board with a slot; according to the size of the slot, providing a first milling knife, wherein a computer digital control system controls the first milling knife through a mechanical milling machine to crudely mill the slot; according to the size of the slot, providing a second milling knife, wherein the computer digital control system controls the second milling knife through the mechanical milling machine to finely mill the slot. Compared with the prior art, the de-burring method for the high-frequency printed circuit board provided by the invention has the advantages that the high-frequency board is molded in the mode that crude milling in the positive direction and fine milling in the negative direction are combined, i.e. the milling knife with the width smaller than the width of the slot is used for cutting the middle of the slot in the position where the slot is required to be molded to crudely mill, and then the milling knife with the width equal to the width of the slot is used for fine milling in the reversing direction, so that burrs generated when the knife is positively travelled are removed, and the aim of de-burring the surface of the high-frequency printed circuit board is fulfilled.

The invention discloses a preparation method and application of a trifolium-shaped catalyst for cooperatively controlling nitrogen oxide (NOx) and a chlorinated volatile organic compound (CVOCs). The catalyst adopts an organic vanadium compound as a vanadium precursor, and titanium dioxide or titanium tungsten powder as a carrier, and is prepared by utilizing a two-step method comprising the concrete steps of (1) utilizing a mechanical milling method for preparing a powder catalyst; (2) adopting an extrusion molding process for preparing the trifolium-shaped structured catalyst. The obtained catalyst is applicable to removing the NOx and the CVOCs of industrial flue gas of the industries such as waste incineration, steel iron sintering and nonferrous metallurgy, and is also applicable to cooperatively removing the NOx and the CVOCs. Compared with an existing commercial catalyst, a commercial vanadium-based catalyst system is rarely changed, the two-step method is adopted, and the obtained catalyst not only has high denitrification rate and CVOCs removal efficiency but only has higher mechanical strength and abrasion resistance, so that the preparation method is a preparation technology beneficial for commercially producing the trifolium-shaped catalyst for cooperatively denitrating and removing the CVOCs.

The invention belongs to the technical fields of a nanometer material and lubricating oil, and discloses a surface modified nanometer material serving as a lubricating oil additive as well as a preparation method and an application thereof. The preparation method mainly comprises the following steps: putting a mixture of powder to be treated and a surface modification agent as well as grinding balls in a ball-milling tank of an improved dielectric barrier discharge plasma assisted mechanical milling device, feeding a discharge atmosphere medium, controlling the temperature of the ball-milling tank, adjusting discharge parameters, and starting the mechanical milling device so as to carry out dielectric barrier discharge plasma assisted mechanical milling, thus obtaining the surface modified nanometer material. The obtained powdery surface modified nanometer material can be added to the lubricating oil so as to improve the performance of the lubricating oil. The preparation method is simple to operate and good in controllability; the obtained surface modified nanometer material is small in particle size, high in activity, good in surface modification and extremely easy to deposit, flatly spread and diffuse on a mechanical friction surface and has excellent dispersion property in the lubricating oil, so that the friction of mechanical movement parts is reduced, and the worn surface is repaired.

The invention discloses a rapid manufacturing method used for an outer storing box gridding wallboard of an aerospace craft, the outer storing box gridding wallboard comprises a bottom board and gridding ribs and is machined by the adoption of friction stir welding equipment. The rapid manufacturing method includes the following steps that (1), a bottom board plate is machined in advance; (2), material of stitch welding plates is selected following the principle of component matching between the stitch welding plates and the bottom board or the principle of performance complementation; the size of the stitch welding plates is determined according to the gridding number, the gridding size and the rib width on the bottom plate; (3), a friction stir stitch welding clamp used for the structure is designed; (4), the manufacturing concept of layering material increase-partial milling is achieved through the friction stir stitch welding gridding ribs; (5), finish machining is performed. The manufacturing concept of layering material increase is combined with the friction stir welding technology, and not only can gridding rib wallboards in various shapes and heights be manufactured, but also a heterogeneous aluminum alloy ribbed bar gridding wallboard can be manufactured and machined on a thin aluminum sheet, which can not be achieved through existing chemical milling and mechanical milling methods.

The invention relates to the technical field of mechanical equipment, in particular to a mechanical milling machine with a clamping function. According to the mechanical milling machine with the clamping function, the problem that the clamping effect is unsatisfactory can be solved. The mechanical milling machine with the clamping function includes a supporting table, a supporting column is fixedly connected at the bottom center of the supporting table, and a damping mechanism is fixedly connected at the bottom of the supporting column; and a clamping mechanism is fixedly connected at the topof the supporting table, a linear actuator which is located at the right side of the clamping mechanism is fixedly connected at the top of the supporting table, and a mounting block is fixedly connected at the top of the linear actuator. According to the mechanical milling machine with the clamping function, a motor runs to enable a rotating wheel to rotate, a pulling rope is used for pulling a connecting column to move to the inner side, so that two protruding blocks can move closer to clamp and fix workpieces and further the clamping effect is better, the time and the labor can be saved, andthe working efficiency during machining can be improved.

The invention discloses a rare earth doping Mg2Si based thermoelectric material. The invention utilizes rare earth doping to improve thermoelectric properties of the material. Rare earth is directly added during melting, then the melted material is hot pressed after mechanical milling, and thermoelectric material blocks Mg2-xSiREx are obtained, in which RE represents rare earth element, and x equals to 0.002 to 0.01. The invention, the rare earth doping Mg2Si based thermoelectric material, has better thermoelectric properties than non-doping Mg2Si2 thermoelectric material; the doped rare earth elements comprises heavy rare earth and light rare earth; the mechanism is that rare earth elements have similar properties as alkaline earth metal; Mg is easily substituted after rare earth elements are added as donor doping, which increases carrier concentration and thus improves thermoelectric properties of the material.

The invention provides a chemical mechanical milling process comprising following steps: first, loading the wafers which has lines of metal layer and baffle layer; then, via one first milling cushion, milling the metal layer in same milling speed to expose the lower baffle layer, wherein, the first milling paste distributed on the first milling layer has high milling selective rate to the baffle layer; the second milling step that utilizing one second milling cushion and the second milling past to mill and remove the exposed baffle layer. According to said invention, the milling selective rate (the copper to baffle layer) of first milling past is at least more than 30 while the better is more than 100.