147 results about "Inorganic crystals" patented technology

The present invention provides a polymer/metal nano-composite. The nano-composite includes at least one copolymer chain having alkenyl monomer units and maleimide monomer units, and a nano-sized metal or inorganic crystal. It also provides a method of producing nano-sized metal/inorganic crystals in pure form. These nano-composites and nano-crystals can be useful as polymer fillers, tire rubber compounds, semiconductors, nano-magnets, catalysts, and quantum dots etc.

The invention discloses a neutron-gamma ray detection device which belongs to the detection technology field. The detector adopts a conventional plastic scintillator or an inorganic crystal to detect gamma rays in the environment and adopts a layer of neutron absorber on the surface of the plastic scintillator or the inorganic crystal to detect neutrons; the detector can be separately used as a neutron detector or be separately used as the gamma detector or be used as the detector for simultaneously detecting the neutrons and the gamma. The neutron-gamma ray detection device can simultaneously detect and monitor the neutrons and/or gamma (X rays) in the environment and the gamma detector can be used as a moderator of the neutron detector, thereby greatly improving the neutron detection efficiency. Working substances of the whole detector are all solids, thereby facilitating the production, the installation, the transportation and the long-term outdoor works.

Apparatus and methods for shaping a surface of a material are described. An example method comprises providing one or more shaping elements, softening the material, and urging the one or more shaping elements against the material so as to form one or more grooves in the material. The configuration of shaping elements can be adjusted to provide a desired pattern of grooves in the surface. The method can be applied to inorganic crystals in a high temperature plastic state, avoiding the problems associated with conventional sawing techniques.

The invention provides a diaphragm for a battery, comprising a base material. The base material comprises through holes, wherein the base material contains polyimide and additives, and the additives are inorganic crystal whiskers and/or orthosilicate ester. The diaphragm prepared by the invention has excellent high-temperature performance, the heat shrinking property of the diaphragm is below 1.1 percent below 400 DEG C, and no cracking phenomenon occurs below 400 DEG C. The mechanical property of the diaphragm is excellent, the tensile-strength of the diaphragm is above 100 Mpa, while the tensile-strength of the diaphragm prepared by the prior art is only 90 Mpa. In addition, perforating substances used by the invention can effectively adjust the average diameter of a hole of the diaphragm within a better range of between 10 and 100 nanometers, thereby guaranteeing the smooth passing of lithium irons in the battery using the diaphragm, reducing the internal resistance of the battery, and having no short circuit.

Disclosed are violet, blue, and green phosphors having excellent durability and high luminance. Specifically disclosed is a phosphor which contains a metal element M (M is at least one element selected from among Mn, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Tm and Yb) for constituting a metal ion, which is solid-solubilized in an AlON crystal, an AlON solid solution crystal or an inorganic crystal having the same crystal structure as AlON. The phosphor is capable of emitting fluorescence having a peak in the wavelength range from 300 nm to 700 nm. Also disclosed is a method for producing such a phosphor. Further disclosed are an illuminating device and an image display each containing such a phosphor.

The invention provides an NMT polyester composition with an LDS function and a preparation method thereof. The NMT polyester composition with the LDS function is mainly prepared from, by mass, 40-90 parts of polyester, 10-40 parts of PCT resin, 0.1-5 parts of ester exchange inhibitor, 10-40 parts of glass fibers, 3-30 parts of inorganic crystal whiskers, 3-15 parts of LDS assistant, 0.3-5 parts of thermal oxidation stabilizer and 3-15 parts of flexibilizer. The polyester is PBT resin and/or PET resin. The binding force between the NMT polyester composition and metal is high, binding strength is higher than 180 kgf/cm<2>, laser etching and chemical plating effects are good, and the requirements of LDS and NMT technologies are met at the same time. The defects that binding force between a common LDS special material and metal is low, molding shrinkage is large, acid-base resistance is poor, and LDS cannot be conducted are overcome; the mechanical performance of the material is excellent, heat resistance is good, and molding processability is excellent.

Provided are systems and methods to generate single-cycle THz pulses from a few tens of nanometers thin layer of split ring resonators (SRRs) via optical rectification of femtosecond laser pulses. The emitted THz radiation, with a spectrum ranging from about 0.1 to 4 THz, arises exclusively from pumping the magnetic-dipole resonance of SRRs around 200 THz. This resonant enhancement, together with pump polarization dependence and power scaling of the THz emission, underpins the nonlinearity from optically induced circulating currents in SRRs, with a huge effective nonlinear susceptibility of 0.8×10⁻¹⁶ m²/V that far exceeds surface nonlinearities of both thin films and bulk organic/inorganic crystals and sheet nonlinearities of non-centrosymmetric materials such as ZnTe.

A blue fluorescent material having excellent durability and a high luminance, especially one emitting a high-luminance light by the action of electron rays. The fluorescent material comprises inorganic crystals having a crystal structure which is an AlN crystalline, AlN polycrystalline, or AlN solid-solution crystalline structure. It is characterized in that the inorganic crystals contain at least europium in solution and have an oxygen content of 0.4 mass % or lower and that the fluorescent material emits fluorescence derived from divalent europium ions upon irradiation with an excitation source. More preferably, the fluorescent material contains a given metallic element and silicon. Also provided are a process for producing the fluorescent material and an illuminator including the blue fluorescent material.

The invention provides a polypropylene composition and a polypropylene material as well as an application thereof. The polypropylene composition comprises polypropylene, a nucleating agent and an antioxidant, wherein the nucleating agent comprises a crystal form alpha nucleating agent and a crystal form beta nucleating agent, the crystal form alpha nucleating agent is selected from one or more of an inorganic crystal form alpha nucleating agent, a sorbitol nucleating agent and an organic phosphate nucleating agent, and the crystal form beta nucleating agent is selected from one or more of a mixture of binary acid and an II Ath group of metal salts, a rare earth crystal form beta nucleating agent and an amide nucleating agent. The polypropylene material prepared from the polypropylene composition provided by the invention can be used for well integrating effects of relatively low tensile strain, relatively high tensile strength and relatively good heat resistance and long-term creeping strength, and has great industrial application prospects.

Disclosed is a method for preparing inorganic crystal whisker with SiO2-coated surface which comprises, subjecting the inorganic crystal whisker to decentralized processing in precursor solution, carrying out inorganic coating by employing homogeneous precipitation method, thermal insulating and ageing, filtering, scouring, and drying to obtain the inorganic crystal whisker with SiO2-coated surface.

The invention relates to a group of medical ceramic bone with different structures in the same class. The inorganic crystal grid is consistent to the normal bone with the method, it can be divided into skin bone type, loose bone type, compound type and particle type according to the structures, its primary ingredient is natural ramification of aspatite. The manufacturing method is: selects bones on different part of huge animal, and then carries on degreasing, protein eliminating, dehydrating, and baking. According to different structures, the carrier which can be used as transplanting material, medicine or growing factor and bracket material of organization project, it can form new bones with different effects.

Inorganic crystals having one or more species of dopant ions which are photo-reactive are used as visible and or infrared light optical limiters to protect against laser radiation exposure while permitting passage of the visible and or infrared light spectrum at least until exposed to high energy laser radiation. The dopant ions are selected from ions of transition metals. The exposure of these ions within the transparent crystalline matrix either photo-ionize or are elevated to an excited state and thereby absorb or otherwise attenuate the passage of the laser beam radiation sufficiently to protect human eyes or photo-sensitive equipment. The crystals may be fabricated into such items as lenses for use in eyeglasses or on shields of flight helmets to protect the eyes of aircraft pilots.

The invention discloses a nuclear detection device which comprises a flicker unit, a micro-optics unit, a photovoltaic conversion device and an image collecting and data processing unit, wherein the flicker unit is made of organic or inorganic crystals or thin film materials and is used for converting incidence beams into flicker light, and the converted flicker light is radiated to the micro-optics unit; a unit lens is used for generating a unit image of an object and the image is received by the photovoltaic conversion device; the photovoltaic conversion device is used for converting the received unit image into a two-dimensional data electric signal and transmitting the unit image to the image collecting and data processing unit; and the image collecting and data processing unit is used for acquiring, storing and processing the two-dimensional data electric signal obtained by the photovoltaic conversion device, and carrying out data reconstruction according to an optical path structure of the device so as to obtain the position that a photon is generated in the flicker unit. With the adoption of the device, the requirements on the flicker materials are reduced, the three-dimensional information about the position that the flicker light is generated in the flicker materials is obtained directly, the position identification can be realized and at the same time energy identification ability is provided, so that the performance of the nuclear detection device is improved.

The invention discloses an enzyme-inorganic crystal compound microsphere and a preparation method thereof. The preparation method of the enzyme-inorganic crystal compound microsphere provided by the invention comprises the following step: dissolving metal ions and the enzyme in a phosphate buffer to obtain the enzyme-inorganic crystal compound microsphere, wherein the metal ions are any one of calcium ions, magnesium ions, iron ions, ferrous ions, cupric ions, nickelous ions or zinc ions, and the phosphate buffer comprises phosphate dihydrogen ions or dihydrogen phosphate ions. The preparation method of the enzyme-inorganic crystal compound microsphere provided by the invention has the advantages of simplicity in operation, low cost and the like. The stability of the enzyme in the enzyme-inorganic crystal compound microsphere provided by the invention is improved and the activity of the enzyme is substantially maintained unchanged or even improved.

The invention provides a method for preparing an inorganic crystal whisker/POSS (Polyhedral Oligomeric Silsesquioxane) hybrid material by utilizing sulfydryl-alkene click reaction. The method comprises the following steps: under an ultraviolet illumination condition, carrying out the sulfydryl-alkene click reaction by utilizing a double bond (C=C) in vinyl POSS in the presence of sulfydryl (-SH) on the surfaces of inorganic crystal whiskers, so as to combine traditional micron-grade inorganic crystal whiskers with nano-grade POSS, and successfully synthesize the novel inorganic crystal whisker/POSS multi-scale hybrid material. According to the method provided by the invention, the surface performance of the crystal whiskers can be regulated and controlled to the greater extent through adjusting eight organic functional groups on the surface of the POSS, and the surface polarity of the crystal whiskers is improved; compared with an existing traditional crystal whisker surface modification method, the problems of agglomeration of the crystal whiskers and dispersion of the crystal whiskers in organic matrixes can be solved better. The method has the advantages of simple steps, convenience for operation and strong practicability.

The invention provides modified polytrimethylene terephthalate resin, comprising polymer matrix, strengthening agent and toughener. The compositions by weight portion of the modified polytrimethylene terephthalate resin are: 100 portions of polymer matrix, 1 to 80 portions of reinforcing agent, and 1 to 40 portions of toughener. The polymer matrix is polytrimethylene terephthalate resin with single viscosity, a mixture of polytrimethylene terephthalate resin with viscosities of different properties, or a compound of polytrimethylene terephthalate resin and other high molecular polymers; the strengthening agent is selected from fiberglass, acicular wollastonite, attapulgite, sheet talcum powder, nano-mica powder, nano-montmorillonite, inorganic crystal whisker, organic crystal whisker or a nano-carbon tube; and the toughener is selected from inorganic particles, rubber or thermoplastic elastomer. The modified polytrimethylene terephthalate resin can realize strengthening effect and toughening effect at the same time, greatly improve the application effect and the application field of the polytrimethylene terephthalate resin, and can meet requirements in related aspects.

The invention discloses an inorganic crystal compound Rb2BiI5O15 as well as a preparation method of the compound and an application of the compound as a second-order nonlinear optical crystal material. The material has the outstanding characteristics as follows: RbIO4, RbCl, Bi2O3 and H5IO6 are taken as initial reactants for the first time and the material is prepared by adopting a hydrothermal method; a relatively good second-order nonlinear optical effect capable of being subjected to phase matching is obtained; very large light-transmitting windows are formed in a visible light region and a mid-infrared light region; a band gap is relatively large and the thermal stability is relatively good; a synthetic method is easy to operate, high in raw material utilization rate, mild in experimental conditions and high in product purity; the crystal material can be widely applied to the field of optics.

The invention discloses a preparation method of a thin electronic polyimide film. The method comprises the following specific steps of 1) performing methyl esterification on 3,4'-BPDA and 4-PEPA to prepare white and yellowish esterification powder (PDE and PEPE), adding BPDE, PEPE and diamine to a solvent at a certain ratio, and performing heating and reflux stirring for 2h to obtain a red-brown synthetic polyamide acid solution, 2) performing filtration, vacuum defoamation, cast film forming, two-way stretch, high-temperature thermoforming treatment, corona treatment and reeling on the synthetic polyamide acid solution to prepare the electronic polyimide film with excellent physical and mechanical properties, and 3) allowing a surface organification modified superfine inorganic crystal whisker and/or a nano particle material and multi-polyamide acid to form in-situ micro-nano compounding to imidize the polyimide film by virtue of crushing and cavitation of high-energy density ultrasonic.

The invention discloses a preparation method capable of achieving large-scale preparation of super-paramagnetic Fe3O4@Au-core@shell structured nanorods with controllable size and dispersion, and belongs to the field of intersection of multiple subjects such as macromolecular living polymerization methods, functional polymer molecule design and inorganic crystal growth. The method comprises the following steps that (1), cellulose used for modifying hydroxide radical serves as a macromolecular initiator, and by means of a continuous polymerization ATRP technology and a linked chemical reaction,a series of brush-shaped triblock polymers cellulose-g-[P4VP-b-PAA-b-PS] and cellulose-g-[P4VP-b-PAA-b-PEG] are prepared separately, wherein the triblock polymers each comprise two template structureunits; (2), a solution-phase synthesis method serves as a basis, a certain quantity of the above-mentioned prepared brush-shaped triblock polymers serves as a monomolecular template, first section P4VP serves as a template phase, FeCl2.4H2O, FeCl3.6H2O and NH3.H2O serve as a precursor compound system, and then super-paramagnetic Fe3O4 nanorods are firstly prepared to serve as cores; and (3), similarly, a Fe3O4 nanorod system with the surface coated with a second template phase PAA serves as the monomolecular template, chloroauric acid serves as a precursor compound, tert-butylamine boron serves as a reducing agent, and then the gold nanorod shell structure is prepared.