75results about How to "Stable and mature process" patented technology

The invention discloses a volume production method of pressureless sintering boron carbide ceramic bullet-proof sheets. The volume production method comprises the following steps: (1) putting various raw materials in material mixing and pulping equipment according to a formula proportion, wherein the raw materials are composed of a solid material A and a liquid material B, the material A comprises the following components in percentage by weight: 75-97wt% of boron carbide powder, 0-15.0wt% of sintering aids, 1.0-12.0wt% of carbon source, 0.5-6.0wt% of adhesive, and 0.5-6.0wt% of dispersant, and the sum of the percentages by weight of the components is 100%; the material B is deionized water; mixed ball milling or high speed stirring is performed on the material A and the material B to prepare a sizing agent, wherein the solid content of the sizing agent is 30-70 wt%; the sintering aids are one or more of nanometer level to micrometer level ZrC, TiC, SiC, AlN and TiB2. The method has the advantages of high yield of a single furnace, high degree of automation, non grinding processing of products, low cost and suitability for mass production, and low-cost and stable mass production is achieved.

The invention discloses an aluminum cladding method for a lithium ion positive electrode material. The aluminum cladding method comprises the following steps: (1) preparing a cladding-free positive electrode material by a conventional method; (b) preparing an aluminum salt solution from an inorganic aluminum salt and a solvent, wherein the aluminum salt solution is taken as a cladding solution, the aluminum salt is selected from aluminum nitrate, aluminum chloride, aluminum sulfate and aluminum acetate and the solvent is selected from ethanol, methanol and isopropanol; (c) adding the cladding-free positive electrode material into the aluminum salt solution, agitating and heating till the solution reflows; (d) after the solution reflows for 30 minutes, filtering to remove the solvent and drying in vacuum at 70-100 DEG C to prepare a semi-finished product; and (e) putting the semi-finished product into a muffle furnace for roasting, and naturally cooling to room temperature to obtain the aluminum-cladded positive electrode material. Compared with the prior art, the aluminum cladding method for the lithium ion positive electrode material disclosed by the invention not only can prolong the cycle life and improve the heat stability of the positive electrode material under high-charging cut-off voltage, but also can reduce the cladding cost and improve the cladding consistency.

The invention relates to a mortar bomb used for fire extinguishing in forest, which is divided into a working part and a propelling part. The working part consists of a fuse, a connecting screw, a medicine package, fire fighting powder, a central slinging medicine pipe, slinging medicine, a shell and a fairing; the pushing part consists of a bomb tail and a basal medicine pipe. The connecting screw of the working part is fixed at the front end of the shell and the front end of the connecting screw fixes the fuse; the central slinging medicine pipe is an acerose metal thin-walled piece that passes through the shell at an axial direction, the front end of which is connected with the fuse through the medicine package and fixed by the connecting screw. The slinging medicine is packed in the central slinging medicine pipe and the fire fighting powder is filled between the central slinging medicine pipe and the shell. The bomb of the invention adopts a mortar that is equipped with a large quantity in saturday night soldier reserve components as a launching platform, thus having far slinging distance, high safety performance, high reliability, large medicine packing amount, high fire fighting efficiency and low production and use cost.

The invention discloses a method for manufacturing a tunable chirped fiber grating. The method manufactures the fiber grating based on optical fiber doped in rare earth element, couples pump light into the manufactured fiber grating, and changes the refractive index of the fiber grating via a temperature gradient formed by the pump light in the fiber grating so as to convert the routine fiber grating into the chirped fiber grating. Furthermore, the method changes the refractive index of the temperature gradient field and the fiber grating by changing the power of the coupled pump light in order to implement the tunable characteristics of the chirped fiber grating and realize the tunable chirped fiber grating based on a light tuning mode. Compared with the prior art, the method in the invention is simple in process, stable in process, low in cost and quick in response speed.

The invention provides a microsensor, and in particular relates to a subcutaneous tissue involvement type glucose microsensor and a preparation method thereof. The subcutaneous tissue involvement type glucose microsensor comprises a base, wherein the base is internally provided with a lead part extending outwards, the tail end of the lead part is connected with a sensor part, and the sensor part and the lead part are arranged on an insulation substrate layer. The subcutaneous tissue involvement type glucose microsensor and the preparation method have the advantages that the structure is compact, the operation performance is improved, and the service life is prolonged.

Ferro-phosphorus aluminum borate whisker preform manufacturing method of the invention comprises the following steps of 1, processing raw material: adopting, by weight, 69-90 parts of aluminium hydroxide, 7-28 parts of boric acid , 0.5-3 parts of ferro-phosphorus, grinding the three materials into fine powder, mixing evenly by using a blender mixer, putting the mixture into a crucible and removing water in the material; 2, pressing and molding a preform blank: according to size, shape and volume fraction of the required whisker preform, determining all press parameters including feed-weight and pressing pressure, putting the processed material into a mould, and pressing and molding the preform blank by using a press machine; 3, sintering at high temperature the preform blank; 4, processing and forming the preform: according to the shape and size of the required whisker preform, turning and processing the preform to a finished product by using a numerical control machine tool. The ferro-phosphorus aluminum borate whisker preform manufacturing method is capable of achieving automation of the aluminum borate whisker preform, and is low in cost, simple in operation, high in production efficiency, and can be applied to pistons, and therefore the cost is reduced.

The invention discloses a ledipasvir key intermediate LD-J, a structure of the ledipasvir key intermediate LD-J and a preparation method of the ledipasvir key intermediate LD-J. The preparation methodcomprises the following steps: (A1) preparing LD-G; (A2) preparing LD-H; (A3) preparing LD-I; (A4) preparing a Grignard reagent; and (A5) preparing LD-J. The ledipasvir key intermediate LD-J and thepreparation method thereof have the advantages that the process is mature and stable, the product is stable in quality, the production process is safe and reliable, and the preparation method is suitable for industrial production.

The invention discloses a special flexible transparent conducting film for a handwriting board and a flexible handwriting film based on such special flexible transparent conducting film. The flexibletransparent conducting film is formed by orderly setting a conducting layer and a protection layer on a non-hardened side of a PET film, the flexible handwriting film based on the flexible transparentconducting film is formed by taking the flexible transparent conducting film as a first electrode layer and a second electrode layer, wherein a conducting side of the first electrode layer is opposite to the conducting side of the second electrode layer and the conducting sides are adhered together through liquid crystal polymer. The flexible handwriting film provided by the invention has the characteristics of high flexibility, high contrast ratio, wide spectrum, wide view of angle, low threshold voltage, low cost, being easy to produce in a manner of large-size industrial production, and soon.

The invention belongs to the field of medical chemistry, and especially discloses a synthetic method of a fotemustine bulk drug. The synthetic method uses triethyl phosphite (I) as an initial raw material to obtain a compound (II) through an acetylation reaction; an oximation reaction is carried on the compound (II) and hydrochloric acid hydroxylamine to obtain a compound (III), which is reduced to obtain a compound (IV); the compound (IV) reacts with 2-chloroethyl isocyanate to generate a compound (V), which is directly treated with nitrosation, without separation, to obtain an objective product (VI). The invention has advantages of a mature, stable and simply controlled technology, simple production steps, good product quality, high yield, cheap and easily available raw material and mild reaction conditions.

The invention discloses an Al<3+> doped and modified LGPS type lithium ion solid electrolyte and a preparation method thereof. The general formula of the solid electrolyte is Li10.35Ge1.35-0.75xAlxP1.65S12, wherein x is more than or equal to 0.05 and less than or equal to 0.20 in the general formula. The solid electrolyte is prepared by adopting a traditional solid phase process. The preparation method comprises the working procedures of batching, primary ball milling, compression molding, primary sintering, secondary ball milling, compression molding, secondary sintering, gold plating and the like. According to the Al<3+> doped and modified LGPS type lithium ion solid electrolyte provided by the invention, Al<3+> is doped in the Ge<4+> position in the LGPS structure, so that the LGPS type lithium ion solid electrolyte with excellent room-temperature lithium ion conductivity performance is obtained, and the room-temperature lithium ion conductivity can reach 22.1 mS / cm. The preparation method of the lithium ion solid electrolyte is stable and mature in process, the adopted raw materials are easy to obtain, and the lithium ion solid electrolyte has universality and industrial practicability and is easy to industrialize.

The invention discloses a spinning production process of a super-fine polyester blended yarn. The spinning production process includes the steps: (1) mixed sliver carding: carding mixed slicers of super-fine polyester fibers by a drawing frame with two transformation needle loops after a sliver mixing machine; (2) recombing: performing transformation by a wool type combing machine, performing combing by a card wire and spiral method, and increasing the density of last three rows of a circular comb to 25 specifications by double top comb structures; (3) combination: mixing the fibers by a drawing frame with two transformation needle loops; (4) twistless roving: adopting a twistless wool type roving machine; (5) twisted roving; (6) spinning. By the mode, the spinning production process of the super-fine polyester blended yarn is particularly designed according to properties such as various characteristics and internal indicators of 0.8dtex super-fine polyester fibers, improved equipmentand parameters are adopted, production effects are good, the process tends to be mature and stable, generation of card neps and twitty yarns is decreased, and yarn quality is good.

The invention provides a SmCo5 permanent magnet ribbon magnet and a preparation method thereof, and relates to magnets of hard magnetic material containing rare earth metals and magnetic transition metals, the composition general formula of the elements of the ribbon magnets is SmxCoyAlzCuuFev, through the addition of different amounts of Al-Cu-Fe alloy in SmCo5 alloy composition, which is equivalent to regularly adding Al-Cu-Fe alloy composition elements in a multi-component mode in the SmCo5 series alloy, to form a multi-element multi-phase strengthening mechanism, the SmCo5 permanent magnet ribbon magnet whose element composition general formula is SmxCoyAlzCuuFev is prepared. The shortcomings are overcome for such cases when in the existing technology after single elements are added, while improvements are made on one or limited several performances of the magnet material, often other performances result in reductions or changes, so that the performance has large differences from the theoretical value, and when a variety of elements are added, no rules can be followed, and inconveniences are brought to the subsequent research.

The invention belongs to the technical field of hybrid integrated circuits, and discloses a servo control circuit, a quartz flexible accelerometer based on the servo control circuit and a manufacturing method. The servo control circuit comprises a differential capacitance detector, a current integrator, an RC low-pass filter, a transconductance / compensation amplifier, a resistance-capacitance feedback network and a capacitor; the quartz flexible accelerometer comprises a connection quartz watch head and a servo assembly. The quartz watch head comprises a shell, a pendulous reed, a differentialcapacitance sensor and a torquer are arranged in the shell, the differential capacitance sensor and the torquer are coaxially arranged with the pendulous reed, the servo assembly comprises an outer shell, the outer shell is connected with the shell, a base plate is arranged between the outer shell and the shell, one side of the base plate is connected with the outer shell, and a servo control circuit and a cover plate covering the servo control circuit are arranged on the other side. The shell is provided with a first binding post and a plurality of second binding posts, the first binding post is electroplated with a gold layer, and the first binding post is in bonding connection with a thick film bonding pad connected with the capacitor through gold wires. The defect that an existing quartz flexible accelerometer is poor in anti-interference capacity is overcome, and the measurement precision of the quartz flexible accelerometer is improved.