400results about How to "Single structure" patented technology

PCT No. PCT/EP96/05382 Sec. 371 Date Jun. 3, 1998 Sec. 102(e) Date Jun. 3, 1998 PCT Filed Dec. 3, 1996 PCT Pub. No. WO97/21924 PCT Pub. Date Jun. 19, 1997A fluid pump has a pump body and a displacer, the displacer and the pump body being implemented such that a pump chamber is defined therebetween, the pump chamber having an inlet opening and an outlet opening, neither the inlet opening nor the outlet opening being provided with a check valve. A drive means is provided which positions the displacer periodically at a first and at a second end position. The displacer closes the outlet opening when it occupies its first end position and leaves the outlet opening free when it occupies its second end position and leaves the inlet opening free at both end positions thereof. The displacer, when moving from the first to the second end position, defines a flow-through gap which opens between the displacer and the pump body in the area of the outlet opening in dependence upon the movement, the flow-through gap being defined such that the flow through the outlet opening depends on the pressure in the pump chamber as well as on the respective opening degree of the flow-through gap.

The invention discloses a synthesizing method of anode material of high-pressure solid-phase ferric-lithium phosphate, which comprises the following steps: blending lithium salt, ferric salt and phosphate according to 1:1:1 proportion evenly; grinding the material into ball for 6-24 h to obtain priority; disposing priority for 2-10 h at 200-350 deg.c in the air environment; cooling naturally; grinding to obtain powder material; adding carbon material in the powder material with weight percentage of carbon material at 1-20 percent; grinding again for 6-24 h; disposing for 4-24 h at 450-1000 deg.c in the 1-15 Mpa inert environment; cooling naturally to obtain the product.

The present invention discloses an eight-arm polyethylene glycol (formula 1), a preparation method and a functionalized derivative thereof, and a biologically relevant substance modified with the functionalized derivative, wherein the octavalent center structure CORE contains the residue obtained after the dehydroxylation of an octahydroxy disaccharide molecule, and n is the polymerization degree of a polyethylene glycol chain, and is selected from 1-2000. According to the present invention, the eight-arm polyethylene glycol has monodispersity or polydispersity; the molecular cost of the initiator is low and the purity of the initiator is low, such that the production cost is substantially reduced, the molecular weight and the distribution control of the polymerization product and the functionalized derivative are precise, and the purity and the performance of the product can be easily improved in the biologically relevant substance modified with the functionalized derivative; and the eight-arm polyethylene glycol and the derivative thereof can further have natural chiral centers. The formula 1 is defined in the specification.

The invention discloses a method for preparing special aromatic polyoxadiazole and flame-retardant high-temperature resistant polyoxadiazole fiber thereof. The special aromatic polyoxadiazole is prepared by the following method that the special aromatic polyoxadiazole is prepared from terephthalic acid, compound of which the structural general formula is expressed as formula I and hydrazine salt serving as monomers through condensation polymerization reaction. The polyoxadiazole fiber with high flame retardancy and high temperature resistance is prepared by using the special aromatic polyoxadiazole as a raw material. The fiber number of the prepared polyoxadiazole fiber is 1 to 20 dtex, the breaking strength is 2.5 to 5 cN.dtex-1, the elongation at break is 10 to 40 percent, the initial modulus is 50 to 250 cN.dtex-1, the moisture regain is 5.0 to 12.0 percent, the limited oxygen index is 30 to 38 percent, and the initial decomposition temperature is above 480 DEG C. The fiber can be widely used in the fields of protective products, filter materials, electric insulating materials, frictional sealed materials, various industrial textiles, high-temperature resistant paper, aviation and aerospace materials and the like.

The invention belongs to the technical field of photoelectric materials, and particularly relates to luminescent materials based on thioxanthene-fluorene spiral structures and organic photoelectric devices adopting the materials as luminescent layers. The luminescent materials adopts the thioxanthene-fluorene spiral structures as skeleton units. Intermediates are prepared through Ullmann reactions, and then the target compounds are obtained through Ullmann reactions or Suzuki reactions. The materials are single in structure and definite in molecular weight. The spiral structures of the materials can adjust an intermolecular accumulation manner, thus effectively inhibiting exciplex luminescence. The materials have deep meaning for development of high-effect devices. The organic photoelectric devices adopting the materials as the luminescent layers have good luminescent properties and can be used for small organic molecule light emitting diodes.

This invention relates to FeLiPO4 doped with La or Ac, positive material of Li ionic secondary cells and its preparation method characterizing that the formula is: LiMxFe1-xPO4 (M is La or Ac, 0.01<-x<-0.05) in the structure of olivine, the preparation includes the following steps: taking Li compound, Fe, phosphate, La or Ac as the raw materials to add them into a ball mill for wet mill then putting them into N2 and H2 mixed atmosphere for pre-calcining, then wet-grinding them and drying them and then ball-milling them, then putting them into N2 and H2 mixed atmosphere for secondary calcining to get the invented positive material. Advantages: fine crystalizatin, conduction performance of ions is good and discharge performance of heavy current is good, tap density is great and the problem of easy oxidation of Fe2+ is solved.

The invention discloses glycosylated boron dipyrromethene fluorophore derivatives as well as a preparation method and application of the glycosylated boron dipyrromethene fluorophore derivatives. The method comprises the following steps: by taking glucose and glucosides thereof as action targets, connecting covalent bonds of the action targets to boron dipyrromethene fluorophore derivatives for photodynamics therapy, so that a third generation photosensitizer against cancer which can be used for targeted therapy is obtained. The dipyrromethene fluorophore derivatives containing glucose and glucosides are taken as study researches, activity study of in-vitro breast cancer-resistant cells MBA-MD-231 is expanded, a prodrug suitable for molecular targeted therapy is screened, and a foundation is laid for applying the glycosylated boron dipyrromethene fluorophore derivatives to targeted therapy of cancers. Moreover, the compound synthesis method is simple, readily available in raw materials, low in cost, few in side reactions, high in yield and simple in purification, and industrial production is promoted.

The invention belongs to the technical field of wireless communication, and discloses a SIW ring slot antenna generating dual-mode OAM vortex electromagnetic waves. The cross section of the SIW ring slot antenna is a circular cross section, and the center of circle is O. The SIW ring slot antenna is composed of an upper metal surface, an intermediate dielectric substrate and a lower metal surface.The SIW ring slot antenna is provided with multiple metalized through holes, a ring radiation slot and three feed coaxial probes which are arranged from outside to inside in turn. Multiple metalizedthrough holes are uniformly arranged along the circumference. The ring radiation slot is etched on the upper metal surface. The three feed coaxial probes are three solid metal columns which are uniformly distributed in the internal side of the ring radiation slot along the circumferential direction. According to the SIW ring slot antenna, the design of the complex feed network can be avoided, thesize of the antenna can be reduced and the compactness and the degree of integration of the antenna can be enhanced.

The invention relates to a method for preparing high-density lithium ferric phosphate, which comprises the following steps of: adding a lithium salt, a ferric salt, a phosphorus-containing compound and doping metal-containing elements into a dispersing agent by the conventional method, and performing ball mill twice; performing drying and predecomposition for 3 to 10 hours; crushing, adding at least one of lithium dihydrogen phosphate or potassium dihydrogen phosphate as a bonding agent in an amount which is 1 to 5 percent based on the weight of a predecomposition product, performing ball mill for 1 to 5 hours, and processing according to the prior art to obtain the high-density lithium ferric phosphate. In the method, the ball mill is performed twice in the first step, so that granules are fine; the grain size can be controlled within the range of between 300 and 2,000 nanometers, so that raw materials are mixed uniformly; more importantly, due to the addition of the bonding agent, the bonding among the granules is enhanced, the stacking density of products is improved, and contact conductivity among the granules is reduced; and the prepared products have good crystallization, simple structure and uniform grain fineness distribution and do not contain impure phases, the tap density is between 1.4 and 1.8 g/cm<3>, the specific surface area is between 5 and 11m<2>/g, the compaction density of pole pieces is between 2.4 and 2.8 g/cm<3>, and the specific capacity of first discharging at the room temperature is between 140 and 160 mAh/g.

The invention discloses a method for preparing a cathode material of lithium iron phosphate for a lithium ion battery. The method comprises the following steps: firstly, adding a certain amount of deionized water into a ball mill, and adding lithium dihydrogen phosphate and ionic compound with good conductivity into the ball mill for stirring and ball milling at a high speed; secondly, adding iron oxide for stirring and ball milling at a high speed, and adding a certain amount of anhydrous ethanol as a dispersing agent; and finally, adding superfine conductive carbon black for full mixing and stirring to obtain evenly mixed powder by spray drying at a high speed, adding the powder into a mixing roll for mixing and granule crushing, and pressing the mixed powder into a block to improve the density of materials once again. After being preserved and sintered for 2 to 6 hours at 600 to 800 DEG C in a non-oxidizing sintering furnace and cooled below 50 DEG C, the materials after tablet pressing and granulation are discharged, crushed, refined and sifted, and the powder is dried so as to obtain lithium iron phosphate powder with no impurities, single structure and small granule size distribution. In addition, the preparation process method through improvement significantly reduces the cost for preparing the lithium iron phosphate and has little pollution.

The invention relates to a flexible nanofiber-based electronic skin as well as a preparation method, and belongs to the field of flexible sensors. The flexible nanofiber-based electronic skin is characterized in that the electronic skin is prepared by attaching two layers of flexible nanofiber membranes which are treated by conductive treatment, and the thickness of the flexible nanofiber membrane is 30-500[mu]m, wherein at least one surface of the two surfaces which are attached is provided with micro groove or micro protrusion structures. The electronic skin solves the problems of high working voltage, large power consumption and low sensitivity in prior art; the electronic skin has the effects of sensitive layers and conductive electrodes with a single structure and a simple process, and the electronic skin can be used for industrial production; the electronic skin has good biocompatibility and can be well integrated with a human skin, and is convenient for constructing a wearable device; a unique nanostructure is applied to the electronic skin, so that the electronic skin has higher sensitivity and better stability; and the whole device is light, small, smart and is convenient for carrying.

The invention provides a structure of a broadband wave absorber and a preparation method. The structure comprises a substrate layer and a half-pyramid structure arranged on the substrate layer, wherein the half-pyramid structure is formed by alternately stacking and combining multiple metal-medium layers, the size of the structure is decreased progressively from bottom to top in the Z direction, the structure is a symmetrical structure, and the axis of symmetrical is a connecting line of centers of the metal-medium layers. A substrate is coated with the metal-medium layers sequentially with a coating method, and then the half-pyramid structure is etched. The structure is simple: the structure of the wave absorber is single and convenient to prepare. The spectrum is easy to measure: at the measurement stage, the band ranging from 8 mu m to 14 mu m is a middle infrared band, and the transmission and reflection spectrum of the structure can be acquired easily by the aid of existing equipment, so that the absorption spectrum is acquired.

The invention discloses a passive distance measuring method based on a target infrared radiation spectrum and a band model. The method comprises the steps of (a) acquiring measurement data necessary for distance inversion through a corresponding sensing device, (b) establishing a distance measuring model based on the band model, and (c) establishing a passive distance measuring database and conducting object distance inversion. According to the method, the fact that the oxygen is evenly distributed in the atmosphere is utilized, a selected oxygen A absorption band is unitary in spectral line structure and has obvious features, an absorption cross section can be easily and accurately solved, interference of other gases in the atmosphere on measurement is avoided, oxygen concentration is stable, the influence of weather and districts is well avoided, and the established distance measuring model based on the band model solves the real-time problem during distance inversion. The technology not only can be used for fixing roadbed stations, but also can be applied to vehicle-mounted or airborne motion platforms, and has important application prospect in respect of infrared search and track systems and optoelectronic countermeasure.

The invention relates to a catalyst for ethylene oligomerization and a preparation method thereof. The catalyst comprises a main catalyst which is a catalyst obtained by the steps of taking molecular sieve as a carrier, carrying out chemical bond grafting of silicon hydroxyl on the molecular sieve surface and a bis(diphenylphosphino)ammonia ligand containing silicon ethoxy, and then complexing with a chromium active component. The invention also provides the preparation method of the catalyst. The catalyst has the advantages of high catalytic activity, easy separation from a product and high content of alpha-olefins in the oligomerization product when used for catalyzing ethylene oligomerization.

The invention discloses a method for preparing a g-C3N4 hollow fiber film on a large scale. The method includes the following steps of putting melamine or urea or a mixture of melamine and urea in a muffle furnace, firing the material at a temperature of 450-600 DEG C for 1-4 hours to obtain yellow g-C3N4 blocks, evenly grinding the yellow g-C3N4 blocks to form g-C3N4 powder, putting the g-C3N4 powder in the muffle furnace, firing the g-C3N4 powder at a temperature of 400-700 DEG C for 1-4 hours to obtain g-C3N4 nanometer sheets, dispersing the g-C3N4 nanometer sheets and polymers in organic solvent to prepare a casting membrane solution, and spinning the casting membrane solution (as a shell solution) and water (as a core solution) in a coagulating bath at the same time through a spinning head of a spinning machine to obtain the g-C3N4 hollow fiber film, wherein the mass ratio of g-C3N4 nanometer sheets to polymer to organic solvent is 1:(0.2-1):(4-10) and the ratio of shell solution flow speed to core solution flow speed is (0.5-5):1.

The invention discloses a preparation method of a composite ceramic powder material used for an environmental barrier coating. The composite ceramic powder is composed of single phase BSAS (1-xBaO-xSrO-Al2O3-2SiO2, x is more than 0 and less than 1). The obtained BSAS composite ceramic powder has the advantages of easiness for ingredient control, high purity, high crystallinity and low synthesis temperature. The composite ceramic powder can be used for plasma spraying after being subjected to ball milling, agglomeration, pelletizing and high-temperature heat treatment, so that the environmental barrier coating is prepared on the surface of a C/C-SiC composite material, the coating can be used for effectively improving high-temperature water oxygen corrosion resistance performance of a C/C-SiC matrix, is applicable to surface high-temperature protection of other silicon substrate materials, can be used for solving the problem of high-temperature water oxygen corrosion of a silicon substrate composite material and has an important application value.

The invention discloses a sewage sample containing basket with storage area adjustable. The sewage sample containing basket can fix sample containers and segregate sewage samples. The sewage sample containing basket comprises a rectangular basket body and is characterized in that at least one pair of sliding grooves which are symmetrically arranged on two opposite sides of the basket body and a partition board. Two sides of the partition board are arranged in the sliding grooves through match of sliding blocks in a sliding mode. Locking devices are arranged between the sliding blocks and the sliding grooves. The partition board can be used for adjusting the internal space of the basket so that sample bottles are pressed and fixed in the basket body and locked by buckles on two sides. Stability, convenience and safety of samples are ensured. The sewage sample containing basket is simple and single in structure and easy to manufacture.

The invention relates to a covalent polycompound of water-soluble polysaccharide and taxane, and a preparation method and medical application of the covalent polycompound. The method disclosed by the invention comprises the following step: connecting the taxane compound to the water-soluble polysaccharide through a covalent bond by adopting selective protection and selective deprotection methods and a plurality of degradable structure units, so as to obtain the covalent polycompound which can retain the biological activity of the taxane compound and is relatively simplex in structure. The novel covalent polycompound is good in water solubility, and can replace an existing clinical taxane preparation free of a cosolvent with toxic and side effects.

The invention belongs to the field of catalysts for the preparation of synthesis gas by reforming hydrocarbons, and particularly relates to a supported uniform nickel-cobalt (Ni-Co) alloy catalyst anda preparation method thereof. The catalyst provided by the invention is prepared from the active phase of a Ni-Co alloy nano particle and a high-specific-surface-area Mg(Al)O composite oxide support.The preparation method comprises the following steps of firstly, synthesizing a Ni-Co-Mg-Al LDHs (Layered Double Hydroxides) lamellar composite hydroxide as a precursor by adopting a coprecipitationmethod, afterwards, obtaining a Mg(Ni,Co,Al)O oxide solid solution through roasting treatment, next, reducing through high-temperature hydrogen to in situ generate the Ni-Co alloy nano particle. The Ni-Co alloy nano particle of the supported uniform Ni-Co alloy catalyst is highly dispersed on the surface of the support, and the supported uniform Ni-Co alloy catalyst has the characteristics of being single in structure, uniform in composition, small in particle size which is approximately 8nm and high in metal-support interaction, and the like, and shows favorable catalytic activity, stabilityand anti-carbon performance to the reforming reaction of methane and carbon dioxide.