73results about How to "Maintain thermal stability" patented technology

A modulation light source capable of maintaining thermal stability of a gain part is provided. A modulation light source includes a DBR laser having a DBR part, a phase part and a gain part, a light wavelength conversion device that receives a fundamental wave from the DBR laser and from which an SHG light is emitted, and a control means for controlling the DBR laser. A substantially constant current is supplied to the gain part for a modulation time period of a PWM signal. At least one of the DBR part and the phase part is controlled for modulation using a current based on the PWM signal.

The invention relates to a method for preparing nitrogen phosphate sulfur-containing reactive flame retardant applied to epoxy resin. The preparation method comprises the following steps: sequentially adding p-hydroxy benzaldehyde, aminothiazole and a solvent into a reactor which is provided with a condensing pipe and a stirrer, and introducing inert gas to perform first reaction; adding 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to carry out second reaction; and pumping, filtering, washing and drying the system to obtain white or light brown nitrogen phosphate sulfur-containing reactive flame retardant after the reaction is completed. The method has the advantages that 1, the synthesizing process is short, the cycle is short, post-treatment is easy, and control and industrial production are easy; 2, the prepared flame retardant contains nitrogen, phosphate and sulfur three flame-retardant elements at the same time, has a synergistic flame-retardant effect, and can be used for remarkably improving the flame retarding performance of epoxy resin; and 3, the prepared flame retardant is a reactive flame retardant, and can be used for keeping stability and mechanical performance of cured epoxy resin while improving the flame retarding effect of the cured epoxy resin.

A modulation light source capable of maintaining thermal stability of a gain part is provided. A modulation light source includes a DBR laser having a DBR part, a phase part and a gain part, a light wavelength conversion device that receives a fundamental wave from the DBR laser and from which an SHG light is emitted, and a control means for controlling the DBR laser. A substantially constant current is supplied to the gain part for a modulation time period of a PWM signal. At least one of the DBR part and the phase part is controlled for modulation using a current based on the PWM signal.

The invention discloses a freeze-dried rabies vaccine for human use and a preparation method thereof. The preparation method comprises the following steps: adding cane sugar and dextran 40 into water for injection respectively, stirring to a fully-dissolved state, and performing steam sterilization at the temperature of 115 DEG C under the pressure of 0.09-0.10 MPa for 45 minutes; adding glycine into water for injection of which the temperature is 15-30 DEG C, stirring to a fully-dissolved state, and degerming and filtering with a microfiltration membrane of 0.22 mu m; preparing a dose of which the total protein content does not surpass 80 mu g according to the measured protein content or antigen content of an early vaccine stock solution, and adding cane sugar of which the final concentration is 4-10 percent by weight, dextran 40 of which the final concentration is 1-4 percent by weight and glycine of which the final concentration is 0.5-2 percent by weight to obtain a semi-finished product; performing split charging on the semi-finished product, semi-plugging, putting into a freezer drier box, setting a freeze drying parameter, and performing freeze drying; performing pre-freezing, vacuum pumping, sublimation, secondary drying and vacuum plugging, and ending freeze drying to obtain the freeze-dried rabies vaccine for human use. Active ingredients in the vaccine disclosed by the invention can be well protected, the vaccine is high in thermal stability, and the period of validity can be at least up to 24 months.

A method of longitudinal recording using a medium with a magnetically soft underlayer is described. The method includes lowering the longitudinal coercivity in a magnetic domain in the magnetic recording medium by generating a vertical component of magnetic flux in the magnetic recording medium and writing a longitudinal orientation in the magnetic domain in the magnetic recording medium by generating a larger horizontal component of magnetic flux in the magnetic recording medium using the write head. Optionally the method further includes magnetically saturating the magnetically soft underlayer after lowering the longitudinal coercivity to limit the vertical component of the magnetic flux. The recording medium has a magnetic recording layer, a spacer layer and a soft underlayer. In one embodiment the soft underlayer is an antiferromagnetically coupled magnetic layer stack with two soft magnetic layers separated by a non-magnetic spacer layer selected to achieve the antiferromagnetic coupling.

An aspect of the present invention relates to optical glass, which is oxide glass including cation components in the form of 10 to 40 cation % of P5+, equal to or more than 50 cation % of a combined quantity of Ti4+, Nb5+, W6+, Bi3+, and Te4+, with a cation ratio of a combined content of Ti4+ and Nb5+ to a combined content of W6+ and Bi3+ being equal to or less than 1.3, a combined quantity of B3+, Li+, Na+, K+, Rb+, Cs+, Mg2+, Ca2+, Sr2+, Ba2+, and Zn2+ which amounts to equal to or less than ⅓ of a combined content of Ti4+, Nb5+, W6+, Bi3+, and Te4+, and more than 0 % of Li+, Na+, K+, Rb+, and Cs+ combined, and which has a refractive index of equal to or higher than 2.02.

A micro-fluid ejection head has a resistor layer defining a heater element. An insulative layer underlies the heater element and a capping layer on the insulative layer substantially prevents ion mobility between the resistor and insulative layers. Resistance stability of the heater has been shown improved as has adhesion of the heater to the insulator. Representative layers include insulation of methyl silesquioxane (MSQ) in a thickness of about 5000 Angstroms or more, while the cap is a silicon nitride in a thickness of about 2000 Angstroms or less. Other capping layers include silicon carbide, silicon oxide or dielectrics. The resistor layer typifies TaAIN in a thickness of about 350 Angstroms, including overlying anode and cathode conductors that define the heater. Coating layers are also disclosed as are thermal barrier layers.

A nonvolatile memory device and a method of manufacturing the same are provided. The nonvolatile memory device which is convertible among a high current state, an intermediate current state, and a low current state, said device includes upper and lower conductive layers; a conductive organic layer comprising a conductive organic polymer and which is formed between the upper and lower conductive layers and has a bistable conduction property; and nanocrystals are formed in the conductive organic layer. The conductive organic polymer may be poly-N-vinylcarbazole (PVK) or polystyrene (PS). The method is characterized in that a conductive organic layer is formed by applying a conductive organic material such as PVK or PS using spin coating. Therefore, it is possible to provide a highly-integrated memory device that consumes less power and provides high operating speed. In addition, it is possible to provide the thermal stability of a memory device by using a conductive organic polymer. Moreover, it is possible to reduce the time required to deposit a conductive organic layer by forming a conductive layer using spin coating. Furthermore, it is possible to form a conductive organic layer in various shapes by using mask patterns that can be formed on a substrate in various shapes.

Provided is a storage cell that makes it possible to improve TMR characteristics, a storage device and a magnetic head that include the storage cell. The storage cell includes a layer structure including a storage layer in which a direction of magnetization is varied in correspondence with information, a magnetization pinned layer having magnetization that is perpendicular to a film surface and serves as a reference of information stored in the storage layer, and an intermediate layer that is provided between the storage layer and the magnetization pinned layer and is made of a nonmagnetic body. Carbon is inserted in the intermediate layer, and feeding a current in a laminating direction of the layer structure allows the direction of magnetization in the storage layer to be varied, to allow information to be recorded in the storage layer.

The method of manufacturing a nonvolatile memory device includes forming a lower conductive layer on a substrate; forming a first conductive organic layer on the substrate using spin coating; forming a metal layer for forming nanocrystals on the first conductive organic layer, the metal layer partially overlapping the first conductive organic layer; forming a second conductive organic layer on the first conductive organic layer using spin coating; transforming the metal layer into nanocrystals by curing; and forming an upper conductive layer on the second conductive organic layer, the upper conductive layer partially overlapping the nanocrystals. The conductive organic polymer may be poly-N-vinylcarbazole (PVK) or polystyrene (PS).

The invention discloses a lithium ion battery electrode binder and application thereof. The lithium ion battery electrode binder is obtained by performing hydrogenation treatment on a binder containing unsaturated bonds, and the hydrogenation treatment is used for partially or completely changing the unsaturated bonds in the binder containing the unsaturated bonds into saturated bonds so as to form the lithium ion battery electrode binder; the binder containing the unsaturated bond comprises one or a combination of several of butadiene styrene rubber, carboxymethyl cellulose sodium, lithium polyacrylate, polyacrylonitrile and sodium alginate.

The invention relates to a method for preparing nitrogen phosphate sulfur-containing reactive flame retardant applied to epoxy resin. The preparation method comprises the following steps: sequentially adding p-hydroxy benzaldehyde, aminothiazole and a solvent into a reactor which is provided with a condensing pipe and a stirrer, and introducing inert gas to perform first reaction; adding 9,10-dihydro-9-oxa-10-phosphaphenanthrene-10-oxide to carry out second reaction; and pumping, filtering, washing and drying the system to obtain white or light brown nitrogen phosphate sulfur-containing reactive flame retardant after the reaction is completed. The method has the advantages that 1, the synthesizing process is short, the cycle is short, post-treatment is easy, and control and industrial production are easy; 2, the prepared flame retardant contains nitrogen, phosphate and sulfur three flame-retardant elements at the same time, has a synergistic flame-retardant effect, and can be used for remarkably improving the flame retarding performance of epoxy resin; and 3, the prepared flame retardant is a reactive flame retardant, and can be used for keeping stability and mechanical performance of cured epoxy resin while improving the flame retarding effect of the cured epoxy resin.