1893 results about "Microwave assisted" patented technology

An apparatus comprises a write pole, a return pole, a wire positioned between the write pole and the return pole, a first free layer, and a first interlayer positioned between the write pole and the first free layer.

A spin transfer oscillator with a seed/SIL/spacer/FGL/capping configuration is disclosed with a composite seed layer made of Ta and a metal layer having a fcc(111) or hcp(001) texture to enhance perpendicular magnetic anisotropy (PMA) in an overlying (A1/A2)_X laminated spin injection layer (SIL). Field generation layer (FGL) is made of a high Bs material such FeCo. Alternatively, the STO has a seed/FGL/spacer/SIL/capping configuration. The SIL may include a FeCo layer that is exchanged coupled with the (A1/A2)_X laminate (x is 5 to 50) to improve robustness. The FGL may include an (A1/A2)_Y laminate (y=5 to 30) exchange coupled with the high Bs layer to enable easier oscillations. A1 may be one of Co, CoFe, or CoFeR where R is a metal, and A2 is one of Ni, NiCo, or NiFe. The STO may be formed between a main pole and trailing shield in a write head.

The invention discloses a method for preparing nanometer silver lines in large batch. anhydrous silver nitrate AgNO3 with the concentration of 99.9percent, anhydrous glycol (C2H6O2) of 99.8percent and polyvinylpyrrolidone (PVP, with the molecular weight of 55,000) of 98percent are selected as the raw materials; in a microwave-assisting environment, the method of adopting the glycol to reduce the silver nitrate is adopted to prepare nanometer silver lines in large batch. By replacing the original solvent heating method with the high-heat environment created by microwave, the method not only greatly saves the reaction time but also reduces the preparing costs for the nanometer silver lines. The glycol, a moderate reducer, can slow the reaction, thus providing the time for the growth of nanometer silver lines. The method of the invention is the optimal method for preparing the nanometer silver line according to testing results by comparing the influence of micro strength, precursor concentration and microwave processing time on the appearance and size of the prepared nanometer lines. The method of the invention has low cost, is simple method and easily controlled and has high practical value in the application to the industrial production developing nanometer silver lines.

A disclosed preparation method for a graphene quantum dot film comprises the following concrete steps; employing a modified Hummers process to prepare graphite oxide; dispersing graphite oxide in a dispersant, and using a microwave-assisted solvothermal process to prepare graphene quantum dot; and dropwise adding the graphene quantum dot solution on a liner, and performing spinning coating to obtain the graphene quantum dot film. The method is cheap in raw material, simple in equipment and convenient to operate; the obtained graphene quantum dot is good in solubility and uniform in dimension; and the graphene quantum dot film is uniform in thickness and good in electric conductivity, and has considerable application prospect on the aspect of solar cells.

According to one embodiment, a high-frequency magnetic field-assisted magnetic recording head includes a main pole adapted for producing a writing magnetic field, a STO positioned above the main pole, a low-resistance layer positioned above the STO, and a current confinement layer positioned between the low-resistance layer and the main pole, wherein the main pole and the low-resistance layer are adapted for acting as poles for writing data to a magnetic medium in response to a flow of current to the STO positioned therebetween to generate a high-frequency magnetic field which overlaps with the writing magnetic field, and wherein the current confinement layer is adapted for controlling a current density and/or a current density distribution of the current flowing to the STO. Other magnetic recording heads and methods of production thereof are also described according to more embodiments.

The present invention relates to an improved reactor, which allows microwave-assisted processing of feedstocks or mixtures of hydrocarbons, and the operating system thereof, which operates under high temperatures and pressures of hydrogen or other gases, in continuous of batch mode. The invention relates to modifications in the geometric configuration of the reactor to process diverse hydrocarbon feedstocks, with or without the addition of catalysts, in the presence or absence of hydrogen or other gases, forming a system which includes a reaction vessel and associated devices, so as to to allow better transmittance of the radiation onto the feedstock to be processed and guarantee maximum absorption of the microwaves by the the reaction medium irrespective of the composition thereof.

Microwave assisted synthesis may be used to produce water-repellent metallic organic frameworks (MOFs) molecules. The water-repellent MOFs contain non-polar functional groups, such as a trifluoromethoxy group, which has a strong water repellent effect. The water-repellent MOF, when exposed to water vapor for one week does not result in a significant X-ray power pattern change. The water-repellent MOFs may be suitable as an adsorbent in many industrial applications, such as gas chromatography.

The invention provides a novel magnetic porous metal-organic skeleton (Fe/C@ MOF) composite absorbent and a preparation method thereof. Biomaterials which are extensive in source and low in price are served as the carbon source; the Fe<3+> ions are served as the precursor of the magnetic material; under the microwave-assisted condition, magnetic Fe/C material is quickly synthesized; then, the method of self-assembly layer by layer is adopted, so as to alternately deposit metal central ions and organic ligands on the surface of the magnetic Fe/C material and achieve the in-situ synthesis of the MOF; the magnetic Fe/C@ MOF composite is prepared. The preparation method provided by the invention is simple in the preparation technology; moreover, the prepared magnetic Fe/C@MOF composite has the advantages of large specific surface area, high adsorption capacity, capability of magnetic separation, reutilization and the like. The prepared composite simultaneously has the capability of adsorbing and removing organic dye and heavy metal ions. Therefore, the prepared composite has favorable application prospects in the fields of environmental remediation, wastewater treatment, separation science and the like.

The invention relates to a method for extracting suaeda salsa flavone and measuring content of flavone in suaeda salsa. The method comprises the following steps: 1), collecting the suaeda salsa, drying the suaeda salsa and crushing the suaeda salsa; with ethanol as an extractant, soaking the suadeda salsa and carrying out microwave-assisted extracting; filtering; extracting with petroleum ether; transferring the ethanol layer to a macroporous adsorption resin layer; and eluting with water and ethanol aqueous solution sequentially; collecting the eluant, and pressurizing and concentrating the eluant to obtain flavone compound extract; 2), with rutin as a contrast, preparing standard solution with different concentration gradients; measuring the chromatographic peak area at the wavelength of 360nm through a high efficiency liquid chromatography to form flavone content contrast reference; measuring the chromatographic peak area of the to-be-measured solution; obtaining the flavone content of the to-be-measured solution according to the flavone content contrast reference; and obtaining the content of the flavone in the suaeda salsa according to the dilution multiple of the to-be-measured solution. According to the method provided by the invention, soaking and microwave-assisted extracting are adopted to extract flavone, and the content of the flavone is measured by chromatography, so that the method is simple and the solvent is easily available. Besides, the obtained flavone is high in content, and has the physiological and pharmacological activities such as antiviral activity, antioxidant activity, anti-ageing activity and the like.

A method of forming a nanocrystalline metal, comprising the steps of: providing a reaction mixture comprising a metal precursor and an alcohol solvent; continuously flowing the reaction mixture through a reactor; applying microwave or millimeter-wave energy to the reaction mixture; wherein the microwave or millimeter-wave energy is localized to the vicinity of the reaction mixture; and heating the reaction mixture with the microwave or millimeter-wave energy so that the alcohol solvent reduces the metal precursor to a metal; wherein the heating occurs in the reactor.

A microwave-assisted magnetic recording head includes: a main magnetic pole that generates a recording magnetic field to be recorded on a magnetic recording medium; a shield; and an oscillator that is provided between the main magnetic pole and the shield and generates a microwave magnetic field. The microwave-assisted magnetic recording head is provided with a thermal expansion device for adjusting a relative position between the oscillator and the main magnetic pole so as to be able to independently adjust a recording magnetic field from the main magnetic pole and a microwave magnetic field from the oscillator.

The invention discloses a medlar and red date enzyme and a preparation method thereof, which belong to the technical field of enzyme preparation. Multi-strain composite fungi powder is adopted as a leavening agent; the medlar and the red date are adopted as main raw materials; dietary fiber, pectin hydrolyzate, seasoner extracting liquor, Chinese herbal medicine extracting liquor, enzyme stabilizer and other multifunctional auxiliary raw materials are scientifically compounded and modified; low-temperature processing technology such as ultrasonic cleaning, cryogenic grinding, microwave-assisted high-voltage pulse electric field processing and ultrasonic ripening are mainly adopted in the whole process, so that the natural colors, the flavor, the taste and the content of the active materials of the medlar and the red date are maintained furthest, the biological stability, the non-biological stability and the biological activity of the medlar and red date enzyme are obviously enhanced, the introduction of chemical addition agent is reduced, and the juicing rate of the medlar and the red date as well as the food safety of the enzyme are improved. Finally, the medlar and red date enzyme with high biological activity, strong stability, strong taste, flavor and appetite, long expiration date and edible safety is prepared.

Disclosed is a technique of providing a large-capacity magnetic storage device at high device manufacturing yield while keeping the reliability, the magnetic storage device enabling recording on a perpendicular magnetic recording medium having distribution of characteristics in the circumferential direction as well at high track density of 500 kTPI or more that would be expected from the average characteristics of the medium. A recording condition from is selected for each sector from a parameter table that stores a set of at least two types of recording conditions by a microwave assisted magnetic recording head including a magnetic recording pole and a high-frequency magnetic field oscillator in the magnetic storage device, and information is recorded for each sector based on the condition.

A microwave assisted magnetic recording system includes a write pole that generates a write magnetic field, an element that generates a radio frequency assist magnetic field, and a recording medium that moves relative to the write pole. The recording medium is exposed to the radio frequency assist magnetic field before it is exposed to the write magnetic field. One possible element that generates the radio frequency assist magnetic field is an assist wire placed perpendicular to the write pole. Alternatively, the assist wire can be placed parallel to the write pole so that its radio frequency assist magnetic field couples with the write pole, which in turn generates its own coupled radio frequency magnetic field along with the write magnetic field.

The invention discloses a preparation method of ganoderma lucidum polysaccharide with high yield, which comprises the following steps: firstly, crushing ganoderma lucidum fruiting bodies into ganoderma lucidum powder, then sequentially extracting the ganoderma lucidum powder by adopting a microwave-assisted hot water extraction method and an ultrasonic-assisted hot water extraction method, and carrying out concentration, impurity removal, concentration, alcohol precipitation and drying on the obtained extracting solution to obtain water-soluble ganoderma lucidum polysaccharide; and extracting the ganoderma lucidum residues by adopting an alkali extraction method, and carrying out neutralization, dialysis, concentration, impurity removal, alcohol precipitation and drying on the obtained extracting solution to obtain alkali-soluble ganoderma lucidum polysaccharide. The method is used for extracting the ganoderma lucidum polysaccharide by combining microwave heating action and ultrasonic cavitation and extracting the alkali-soluble polysaccharide in the ganoderma lucidum by utilizing the alkali extraction method, thereby reducing the loss of the ganoderma lucidum polysaccharide; and the prepared ganoderma lucidum polysaccharide has the characteristics of high production yield, strong immunological activity and the like.

Abstract of Disclosure An instrument is disclosed for microwave-assisted chemical processes that avoids tuning discrepancies that otherwise result based upon the materials being heated. The instrument includes a source of microwave radiation, a waveguide in communication with the source, with at least a portion of the waveguide forming a cylindrical arc, a cylindrical cavity immediately surrounded by the cylindrical arc portions of the waveguide, and at least three slotted openings in the circumference of the circular waveguide that provide microwave communication between the waveguide and the cavity.