580 results about "Phase composition" patented technology

A TBC system suitable for protecting the surface of a substrate subjected to a hostile thermal environment. The TBC system comprises a bond coat on the substrate surface, an alumina scale on the bond coat, and a multilayer TBC comprising a thermal-sprayed first ceramic layer on the alumina scale and a thermal-sprayed second ceramic layer overlying the first ceramic layer. The first ceramic layer consists essentially of partially stabilized zirconia so as to comprise the tetragonal and cubic phases of zirconia. The second ceramic layer consists essentially of fully stabilized zirconia so as to consist essentially of the cubic phase of zirconia. The second ceramic layer is also characterized by having vertical microcracks that extend through the thickness thereof. The second ceramic layer is thicker and more erosion resistant than the first ceramic layer.

The invention discloses a sintered Nd-Fe-B magnet with high corrosion resistance and the grain boundary reconstruction and a preparation method thereof. The composition of the invention is that: NdeFe100-e-f-gBfMg, wherein, e is greater than or equal to 6 and equal to or less than 24, f is greater than or equal to 5. 6 and equal to or less than 7, g is greater than or equal to 0.03 and equal to or less than 8, M is one or some of elements Dy, Tb, Pr, Sm, Yb, La, Co, Ni, Cr, Nb, Ta, Zr, Si, Ti, Mo, W, V, Ca, Mg, Cu, Al, Zn, Ga, Bi, Sn and In; The method is that: main phrase alloy and reconstructed grain boundary phase alloy are respectively pulverized and mixed uniformly; the powder mixture is pressed to a mould in the magnetic field, and fabricated into a sintering magnet in a high vacuum sintering furnace. By the reconstruction of the grain boundary phase composition, the invention can obtain the grain boundary phase alloy with low melting point and high electrode potential, decrease the potential difference between the main phase and the grain boundary phase on the basis of ensuring the magnetic properties, promote the intrinsic corrosion resistance of magnet, and has the advantages of simple process, low cost and being suitable for the batch production. Therefore, by combining the grain boundary reconstruction and double alloy method, the sintered Nd-Fe-B magnet with high intrinsic corrosion resistance can be prepared.

The present invention relates to personal care foaming and cleansing products comprising multiple phases which are separate and distinct and comprise at least one surfactant solution having a density or specific gravity of approximately 1.0. In a two-phase composition, a second separated phase may comprise cosmetically acceptable oily materials as emollients/conditioners having a density greater than that of the surfactant solution. In a three phase composition, an additional phase may comprise a low density emollient/conditioning compound(s) as an upper third phase. Thus, two, three or even four phase foaming bath products, shampoos and skin cleansers can be produced that can be differentially colored to enhance the visual separation of the layers and will provide foaming, cleaning, conditioning and emolliency in a unique and attractive manner.

Compositions in the form of a spray contain a pharmaceutical active agent, at least one volatile silicone and a non-volatile oily phase, formulated into a physiologically acceptable medium, are well suited for improved transdermal administration in cosmetics and dermatology.

The invention relates to liquid chromatography techniques for rapidly characterizing samples, such as polymer solutions, emulsions and dispersions, and to devices for implementing such techniques. The system includes a design that provides the ability to perform chromatographic separations by using mobile phase composition gradients and temperature gradients during separations. The invention accomplishes this by providing mixing zones for a plurality of fluids as well as heated and chilled feeds feeding the fluids to the mixing zones. Additionally, the system provides the ability to analyze separated components with a detector and/or collect separated fractions into vessels of a fraction collector for further separation and/or analysis.

The present invention relates to novel processes and compositions for protecting drugs, especially water soluble drugs in aqueous environments. More specifically, this process entails coating drugs with a controlled phase composition wax/lipid middle layer for controlling migration of the drug toward the composition's surface during preparation and a polymeric outer layer.

Mixed-phase TiO₂ nanofibers prepared via a sol-gel technique followed by electrospinning and calcination are provided as photocatalysts. The calcination temperature is adjusted to control the rutile phase fraction in TiO₂ nanofibers relative to the anatase phase. Post-calcined TiO₂ nanofibers composed of 38 wt % rutile and 62 wt % anatase exhibited the highest initial rate constant of UV photocatalysis. This can be attributed to the combined influences of the fibers' specific surface areas and their phase compositions.

The present invention provides porous material of calcium phosphate of high strength whose open pores penetrate the porous body and have a size of 70 μm or more, preferably 100 μm or more, and are arranged in a three-dimensional network, whose porosity is sufficiently high for blood vessels to invade and perforate itself or for cells to infiltrate itself, whose chemical composition, in particular, Ca/P molar ratio can be freely changed within the range of 0.75 to 2.1, to which elements important for facilitating osteogenesis and producing resorbable effect can be added, and whose phase composition can be relatively easily changed. The invention is porous sintered compact of calcium phosphate which has artificially formed, penetrated open pores 70 μm to 4 mm in diameter, whose porosity is from 20% to 80%, and whose chief ingredient is calcium phosphate having a Ca/P molar ratio of from 0.75 to 2.1.

A glass transparent heat-insulating coating and its preparation method, the coating contains cesium tungsten bronze powder with a general formula of Cs0.1-3.5WO3, the crystal phase composition of the powder is Cs0.2WO3 or Cs0.32WO3, the powder The particle size is 100-1300nm, and the specific surface area is 7-50m2/g. The glass transparent heat-insulating coating of the present invention has the functions of visible light transmission and near-infrared shielding, and has the function of light self-regulation, that is, with the extension of light intensity and light time, the effects of visible light transmission and near-infrared shielding will be further enhanced , so it is especially suitable for preparing transparent thermal insulation film on the surface of glass. It is an intelligent transparent thermal insulation coating for glass and has broad application prospects in the fields of thermal insulation of architectural window glass and automotive glass. The coating has simple components and is suitable for large-scale industrial production and practical application.

The present invention provides a method for preparing a zirconium oxide refractory fiber. The method adopts zirconium oxychloride, aqueous hydrogen peroxide solution, yttrium chloride or yttrium nitrate as raw material, the inorganic zirconium spinnable glue solution is made by reaction and compression, the gelatinous fiber can be obtained by centrifugal fiber forming, and after heat treating sintering the zirconium oxide refractory fiber which has the following advantages can be obtained: crystal phase composition with square phase and/or cubic phase zirconium oxide, purity up to 99.5% above, diameter around 5 mu m, length approximate continuous, soft and flexible property and without slag including sphere. The using temperature of the fiber is above 1600 DEG C, the material can be used as extreme temperature refractory, heat insulation material, protecting material, ablative material, satellite battery separator material and the like, used for the fields of aerospace, war industry and national defense, atomic energy and the like; the fiber can also be used as the flame-proof heat-insulating material of the extraordinary high-temperature electric furnace with temperature 1600 DEG C to 2200 DEG C, the oil or gas burning furnace and other extraordinary high-temperature heating mechanism, and is used for the fields of ceramic sintering, crystal growth, metal smelting, petroleum cracking, scientific researching and the like. The invention totally adopts the inorganic raw material, has the advantages of low cost, no pollution, simple technique and excellent effect.

A method for determining a phase composition of a multiphase mixture flowing through a pipe is presented. The method includes exciting one or more patch antennas configured to operate over the range of frequencies. Further, the method includes acquiring at least one of a transmitted signal and a reflected signal over the range of frequencies from the one or more patch antennas. Moreover, the method includes estimating the phase composition of the multiphase mixture based on a group delay determined from at least one of the transmitted signal and the reflected signal. A system for determining a phase composition of a multiphase mixture flowing through a pipe is also presented.

The invention discloses a regeneration method of a catalyst for dehydrogenation of low-carbon alkanes, which comprises the following steps: firstly regenerating the catalyst in the air atmosphere at a lower temperature, burning out carbon deposits on the surface of the catalyst and most of carbon deposits in holes, and then preferably regenerating the catalyst further in a vapor-air mixed atmosphere at a temperature of 400-500 DEG C, so that the carbon deposits on the surface of the catalyst and in the holes can be completely removed, and simultaneously, the acid value and the acid distribution of the catalyst can be modulated so as to restore the crystal form and crystal phase composition of the deactivated catalyst to the original state of the fresh catalyst. Thus, the catalyst can be regenerated, and simultaneously, the physicochemical properties and the dehydrogenation activity of the regenerated catalyst are similar to those of the fresh catalyst, thereby prolonging the service cycle and life of the catalyst. The method has the advantages of moderate regeneration conditions and short regeneration time, and further lowers the production cost of the catalyst.

This invention belongs to battery field, which relates to ultra-micro compound lithium iron phosphate cathode material with high density and its fabrication method. Said cathode material is prepared by mixing iron salt, lithium salt and phosphates at a P/Li/Fe ratio of 1-1.1:1-1.1:1-1.1, adding conductive additives containing dopant element and carbon-bearing organic compound, adding organic acid as carrier, adjusting pH, controlling solution temperature in reactor to form sol, separating the sol to obtain nano-precursor and placing it into micorwave oven under protection of inert gas, and obtaining the final product. It is easy to control the chemical component, phase composition and particle size distribution. The conductive additive can be well-distributed. The method also has the advantages of short reaction time, low energy consumption during synthesis process and low cost. The obtained composite has high purity and good compatibility with electrolyte, excellent conductive property and charge and discharge property with large current, and good structure stability,thermal stability and cycle performance.

The invention relates to a nano ferrous silicate lithium material and a preparation method thereof. The preparation method comprises the following steps: a lithium source, an iron source, a silicate source and a doping element compound are dissolved into a water solution which contains a complexing agent according to a certain stoichiometric ratio, a high-conductivity carbon nano tube dispersed by an auxiliary agent is added into the water solution and used as a wrapping material, an obtained solution is heated under the temperature of 100-200 DEG C for 1-3 hours to obtain gelatin, the obtained gelatin is sintered in an inert atmosphere furnace, the reaction temperature is 600-900 DEG C, and the reaction time is 3-16 hours. The invention effectively controls the chemical composition, the phase composition and the grain diameter of ferrous silicate lithium, and the obtained ferrous silicate lithium is nano ferrous silicate lithium wrapped by the carbon nano tube and has small and uniform grains with high purity quotient, higher charge-discharge capacity and good multiplying power property and circulation property, thus the ferrous silicate lithium is an ideal material for producing lithium ion batteries.

Pumpable multiple phase vesicle compositions carry agents and components downhole or through a conduit, and controllably releasing them at a different place and time by breaking the compositions. In one non-limiting embodiment the pumpable multiple phase vesicles have a third phase containing a first phase which bears the agent to be controllably released. The first and third phases of the vesicles are separated by a surface active material bilayer that forms the second phase. The pumpable multiple phase vesicles may have internal and external phases that are both oil miscible, both aqueous miscible, or both alcohol miscible. The surface active material bilayer may be composed of compounds such as phospholipids, alkyl polyglycosides, gemini surfactants, sorbitan monooleate, sorbitan trioleate, and many others. The agent may be released by one or more of a variety of mechanisms.

The invention discloses Mg-Ni-La based composite hydrogen-storage alloy powder and a preparation process thereof. The Mg-Ni-La based composite hydrogen-storage alloy powder is composed of Mg-Ni-La alloy strips and multi-walled carbon nanotubes (MWCNTs) and TiF3 catalysts. According to the Mg-Ni-La based composite hydrogen-storage alloy powder and the preparation process thereof, a melt rapid-quenching technology is used, a melt is ejected by the aid of the argon gas pressure and sprayed on surfaces of rotating smooth copper rods, by the aid of the quenching effect produced by the rotating copper rods, alloy structures are refined, and channels such as grain boundaries/phase boundaries, which are beneficial to diffusion of H atoms, are increased, so that amorphous/nano crystalline alloys are prepared. According to the Mg-Ni-La based composite hydrogen-storage alloy powder, the MWCNTs and the TiF3 catalysts are added simultaneously, rare earth La is added to improve the phase composition of Mg-Ni alloys, the formation of a new phase is beneficial to decomposition of H2 molecules on material surfaces and diffusion of the H atoms in materials, and the hydrogen absorption and desorption dynamic performance of Mg2Ni alloys is greatly improved.

A low temperature CVD process for deposition of bismuth-containing ceramic thin films suitable for integration to fabricate ferroelectric memory devices. The bismuth-containing film can be formed using a tris(β-diketonate) bismuth precursor. Films of amorphous SBT can be formed by CVD and then ferroannealed to produce films with Aurivillius phase composition having superior ferroelectric properties suitable for manufacturing high density FRAMs.

The invention discloses a method for preparing lithium iron phosphate serving as a cathode material of a nano-level lithium ion battery. The method is characterized by comprising the following steps of: adding a composite carbon source into a solvent, and uniformly dispersing; mixing a lithium source, iron source and phosphorus source compound and the composite carbon source, putting the mixture into a ball grinder for grinding to obtain slurry; drying and smashing the slurry to obtain a precursor; calcining the precursor under a protective atmosphere; and along with the thermal cracking of the carbon source compound, coating a layer of carbon source on a crystal to form a carbon-coated film with relatively high graphitized crystallinity at high temperature, and thus obtaining the lithium iron phosphate with a carbon composite olivine structure. According to the lithium iron phosphate cathode material prepared by using the method, the chemical constituent, the phase composition and the particle size of the LiFePO4 can be controlled effectively; the primary particle size of the LiFePO4 is 20 to 600 nanometers; and the LiFePO4 has relatively high electronic conductivity and relatively high specific capacity.

The invention discloses a Fe/C composite porous structure material as well as a preparation method and application thereof. The Fe/C composite porous structure material is characterized by being prepared from low-grade sedimentary iron ore and biomass as raw materials in manners of crushing, mixing, extrusion molding and pyrolysis and reduction reaction in the presence of hydrogen atmosphere at 650-900 DEG C, wherein the main phase composition comprises biomass carbon and zero-valent iron. The Fe/C composite porous structure material disclosed by the invention is high in opening porosity, magnetic susceptibility, adsorbability and biological chemical activity, can be used for treating eutrophicated river water, living sewage and landscape water bodies, or can be used for mediation of underground water pollution and polluted soil.

The invention relates to a low temperature high intensity welding method of magnesium alloy and aluminum alloy containing a composite middle layer. The method includes utilizing an aluminum film and a nickel foil to serve as a composite middle layer. The aluminum film is precipitated on the face of magnesium alloy to be welded by magnetron sputtering. The method further includes adopting vacuum spreading welding with the welding temperature as 400-460 DEG C, keeping the temperature for 10-120min and enabling the welding pressure to be 0.1-3MPa. The method has the advantage of utilizing a composite middle layer of the aluminum film and the nickel foil to achieve spreading welding of the magnesium alloy and the aluminum alloy. Addition of the aluminum film layer and the nickel foil changes magnesium/aluminum interface phase composition and microstructure, and avoids generation of compounds between high-hardness fragile magnesium and aluminum at the interface. The shearing strength reaches 26MPa, and the magnetron sputtering aluminum coated film on the face of the magnesium alloy to be welded improves inoxidizability of the face of the oxydic magnesium alloy to be welded and improves structure and performance of products between Mg and Ni. The method is suitable for reliable welding of magnesium alloy and aluminum alloy in different kinds, and is simple in process, high in parallel accuracy and small in welding piece transformation.

The invention relates to a method for making a TiO2 nano hole array material and an application thereof. Firstly, a titanium plate undergoes surface treatment and is used as an anode, and in the organic electrolyte solution of hydrofluoric acid or fluoride with the fluorine content of between 0.1 and 10wt%, the titanium plate undergoes the anode oxidation under the voltage of between 10 and 80V for 20 to 100h; after a loose film layer on surface of titanium metals is removed, the titanium based titanium oxide nano hole array materials formed by titanium metals and titanium oxides on titanium surface are obtained with the pore diameter of the materials is between 60 and 400, and the pore depth is between 10 to 250nm; the materials are sintered at the temperature of between 300 and 700DEG C for 0.5 to 1.5h, and the TiO2 nano hole array materials with a certain crystalline phase composition are obtained. The TiO2 nano hole array material of the invention has the advantages that the TiO2 is firmly connected with a matrix, so that the material is strong in withstanding external mechanical acting forces and resisting the stress deformation and cracking caused by the change of ambient temperature; moreover, the material is high in stability, therefore the material is widely applied to such fields as chemical oxygen demand sensors used in photoelectrocatalysis and water pollution monitoring.

A preparing method for a compound finishing agent for micro capsule of blocking polyurethane is provided, which comprises the following procedures: a) preparing the pre-polymer of the blocking polyurethane; adjusting the content of hard blocks with the composition and content of fixing soft blocks not changed, so that the inversible phase composes rich soft blocks and short hard blocks, and fixing phase composes rich hard blocks; b) adding the pre-polymer of the blocking polyurethane and the phase-transformation material in certain proportion into some water solution containing emulsifier to form a water-wrapped-oil emulsion system; when the emulsification goes to such stage as the diameter of micro capsule meets requirement, some chain extender and cross-linking agent are added, they are mixed for certain time under thermostatic condition, now emulsion of compound finishing agent for micro capsule of blocking polyurethane taking blocking polyurethane as wall of the micro capsule and phase-transformation material as the core of the micro capsule is obtained. The invention uses the same chemical substrate-polyurethane, so the requirement from the compound finishing agent on assistant, the formula of the finishing liquid and the finishing process are basically equivalent, thereby the synergy between air permeability, moisture permeability and temperature adjusting can be achieved well.