703 results about "Micron size" patented technology

The invention is related to a cathode material comprising particles having a lithium metal phosphate core and a pyrolytic carbon deposit, said particles having a synthetic multimodal particle size distribution comprising at least one fraction of micron size particles and one fraction of submicron size particles, said lithium metal phosphate having formula LiMPO₄ wherein M is at least Fe or Mn.

Said material is prepared by method comprising the steps of providing starting micron sized particles and starting submicron sized particles of at least one lithium metal phosphate or of precursors of a lithium metal phosphate; mixing by mechanical means said starting particles; making a pyrolytic carbon deposit on the lithium metal phosphate starting particles before or after the mixing step, and on their metal precursor before or after mixing the particles; optionally adding carbon black, graphite powder or fibers to the said lithium metal phosphate particles before the mechanical mixing.

The invention provides homogeneous small spherical particles of low molecular weight organic molecules, said small spherical particles having a uniform shape, a narrow size distribution and average diameter of 0.01-200 μm. The invention further provides methods of preparation and methods of use of the small spherical particles. These small spherical particles are suitable for applications that require delivery of micron-size or nanosized particles with uniform size and good aerodynamic or flow characteristics. Pulmonary, intravenous, and other means of administration are among the delivery routes that may benefit from these small spherical particles.

A process of forming a transistor with three vertical gate electrodes including a high-k gate dielectric and the resulting transistor. By forming such a transistor it is possible to maintain an acceptable aspect ratio as MOSFET structures are scaled down to sub-micron sizes. The transistor gate electrodes can be formed of different materials so that the workfunctions of the three electrodes can be tailored. The three electrodes are positioned over a single channel and operate as a single gate having outer and inner gate regions.

[Problems]To provide a membrane material that realizes effective and efficient separation of a target substance of micron size, being easy to handle and that can be worked into various forms; a blood filtration membrane and a leukocyte removing filter unit that realizes a substantial reduction of filter material volume while retaining high capability of removing leukocytes, thereby reducing the loss of hemocyte suspension; and a cell culturing diaphragm suitable for co-culturing and a relevant method of cell culturing. [Means for Solving Problems]There is provided a composite porous membrane comprising a porous membrane comprised of an organic polymeric compound, and a supporting porous membrane adjacent to the porous membrane, characterized in that the organic polymeric compound constituting the porous membrane penetrates in at least part of a surface adjacent to porous membrane of the supporting porous membrane, the porous membrane having specified opening ratio, average pore diameter, standard deviation of pore diameter, ratio of through pore, average membrane thickness, standard deviation of membrane thickness and internal structure, and that the supporting porous membrane has communicating pores of 0.5D μm or greater average pore diameter. Further, there are provided a blood filtration membrane comprising the composite porous membrane; a leukocyte removing filter unit comprising the composite porous membrane as a second filter; and, utilizing the composite porous membrane, a cell culturing diaphragm and method of cell culturing.

The present invention relates to nanometer and micron polymer material, and is especially one kind of nanometer and micron water soluble microgel oil-displacing material with wide size range and its reverse emulsion polymerizing preparation process. In the reverse emulsion polymerization process, water soluble monomer and cross-linking agent react to form pre-crosslinked spheroid water soluble microgel polymer with certain elasticity. As one kind of oil-displacing material, the nanometer and micron water soluble microgel material is opaque reverse emulsion, and has excellent flowability and stability, viscosity at 25 deg.c lower than 400 mPa.s, no obvious delamination. When the material and water soluble surfactant are injected simultaneously into water, the material will disperse fast and swelled to form microgel grains of 100 nm to 20 micron size.

The invention discloses high-conductivity silver paste for a positive electrode of a crystalline silicon solar cell. The silver paste comprises the following components in percentage by weight: 75-90% of Ag powder, 2-10% of glass powder and 5-20% of organic carrier, wherein the glass powder comprises the following components in percentage by weight: 30-75% of PbO, 7-30% of SiO2, 2-30% of Bi2O3, 1-5% of Al2O3, 1-5% of V2O5, 1-10% of ZnO, 1-5% of Ag2O and 1-8% of MgO. The silver paste has the following beneficial effects: the micron-sized silver powder is adopted to prepare the silver paste, the prepared silver paste has good rheological behavior and thixotropy, a single wafer consumes less silver paste, and the compactness of the positive grid line is improved, thus improving the conductivity; and the glass powder with low-melting erosion property is adopted and can effectively and moderately erode the antireflective film, thus reducing the contact resistance of the crystalline silicon solar cell and improving the conversion efficiency.

The integral engineering rack of interface osteochondro tissue with bionic interface includes from the top to the bottom one cartilage layer, one calcified layer and one bone layer below cartilage connected organically. The cartilage layer consists of type II collagen and chitosan connected in covalent bond; the calcified layer consists of type II collagen and hydroxyapatite connected in covalent bond; the bone layer below cartilage consists of type I collagen and hydroxyapatite connected in covalent bond; and each of the cartilage layer and the bone layer below cartilage has at least one pore of 100-500 micron size. The integral engineering rack of the present invention has excellent biocompatibility, excellent degradability, sufficient mechanical first and bionic interface function.

A method of building a three dimensional (3D) structure includes micro-dispensing a layer comprising a material using a syringe-based micro-dispensing tool, curing the layer, and repeating the steps of micro-dispensing and curing a plurality of times in order to build the three-dimensional structure. The material may be loaded with nano to micron sized particles, tubes, or strings.

A method of synthesizing complex, multi-part pharmaceuticals, chemical substances and engineered polymers through the process of electrospraying, electrospinning or extrusion utilizing tiny glass fiber known as “Holey” Fibers. The “holey” fibers have a unique property associated with them as they contain various combinations of micron sized holes running the length of the glass fiber. The holes can be made homogenous, i.e. all the same diameter, or of varying dimensions in concentric rings, enabling several chemicals to be combined together at synthesis. The advantage of using a glass holey fiber is that it is made from a chemically inert glass, that will not affect to chemicals involved with the exception of certain fluorine substances.

Silicon alloys have the highest specific capacity when used as anode material for lithium-ion batteries, however, the drastic volume change inherent in their use causes formidable challenges toward achieving stable cycling performance. Large quantities of binders and conductive additives are typically necessary to maintain good cell performance. In one embodiment of the invention, only 2% (by weight) functional conductive polymer binder without any conductive additives was successfully used with a micron-size silicon monoxide (SiO) anode material, demonstrating stable and high gravimetric capacity (>1000 mAh/g) for ˜500 cycles and more than 90% capacity retention. Prelithiation of this anode using stabilized lithium metal powder (SLMP®) improves the first cycle Coulombic efficiency of a SiO/NMC full cell from ˜48% to ˜90%. This combination enables good capacity retention of more than 80% after 100 cycles at C/3 in a lithium-ion full cell.

A polymeric material such as PDMS is molded into an electrode structure containing a micron-size aperture for receiving and forming a giga-ohm seal with a biological membrane One end of a tube is filled with uncured polymeric material and pressed against a support surface to prevent drainage. A conventional micropipette having a size suitable for sliding through the tube is introduced, tip first, into the tube and is allowed to fall through the polymeric material and rest against the support surface. The assembly is heated to cure the polymer and the micropipette is removed from the tube, thereby leaving a polymeric plug at the end of the tube with an aperture suitable in shape and size for patch-clamp giga-ohm seal electrode applications. A multi-well tray with a polymeric electrode plug in each well is constructed using the same approach.

The invention provides a measuring method for reservoir pore structure of compact oil and gas reservoir. The measuring method comprises steps: core characteristics of a compact oil and gas reservoir sample are obtained; the scattering length density of the compact oil and gas reservoir sample is calculated through the core characteristics of the sample; the scattering intensity of the sample is calculated through scattering length density; the pore superficial area of the sample is calculated through the scattering intensity; the total pore volume of the sample is calculated through the pore superficial area. The reservoir pore structure of the compact oil and gas reservoir is measured through SANS/USANS, The trends of the result and the pore size distribution curves of the N2 adsorption experiment are consistent. Low pressure adsorption experiments show that the content of micropores is low, and show existence of micron-size pores, and the pores are not communicated. The measuring precision is high, and the measuring accuracy is high.

The invention discloses a method for preparing a granular reinforced damping porous nickel-titanium memorial alloy based composite material. The method comprises: after evenly mixing silicon granules or aluminum oxide granules of nickel-titanium metal powder and a controlled material according to a certain proportion by adopting a step powder-sintering method, pressing the granules into a raw blank, and then integrally sintering the pressed granules once by adopting a step heating mode to prepare the composite material, wherein the silicon granules or the aluminum oxide granules account for 5 to 15 percent of weight of the raw blank. Through introducing the porous granular controlled material with low density and micron size into the nickel-titanium memorial alloy, the method quantitatively controls damping and mechanical properties of the nickel-titanium alloy, and finally obtains the novel high-damping porous nickel-titanium alloy based composite material. The composite porous nickel-titanium memorial alloy still has shape memory effect and hyperelastic deformation capability, and has better strength and damping capability compared with the common porous nickel-titanium alloy; and the method has the advantages of good adaptability, simple preparation process and low cost, and can be used for manufacturing composite damping materials, damping structures and devices.