42results about How to "Ensure thermal stability" patented technology

Disclosed is a method of manufacturing density enhanced, bonded permanent magnets having the following properties: a. maximum energy product (BH)max up to 40% greater than that of traditional, mechanical, compacted, bonded permanent magnets, b. (BH)max up to 99% of theoretical, c. void ratio approaching 0 volume %, and d. use temperature from room temperature up to about 550° C., said method comprising the step of compacting a mixture of permanent magnet particulates and a binder using pulsed electromagnetic forces, where each pulse has a pulse time less than the thermal time constant of the permanent magnet particulate, and wherein said compaction is achieved without adversely affecting the binder or the structure of the permanent magnet particulates.

The rechargeable lithium ion battery includes a positive active material including a lithium compound, a non-aqueous electrolyte including at least one disulfonate ester selected from a cyclic disulfonate ester represented by Chemical Formula 1 and a linear disulfonate ester represented by Chemical Formula 2, and includes at least one carbonate having an unsaturated bond selected from vinylene carbonate and vinylethylene carbonate. The non-aqueous electrolyte may include about 0.05 wt % to about 0.5 wt % of the disulfonate ester based on the total weight of the non-aqueous electrolyte, and about 0.2 wt % to about 1.5 wt % of the carbonate having the unsaturated bond based on the total weight of the non-aqueous electrolyte.

An aspect of the present invention relates to magnetic recording powder, which comprises hexagonal ferrite magnetic particles, the hexagonal ferrite magnetic particle comprising 0.5 to 5.0 atomic percent of an Fe substitution element in the form of just a divalent element per 100 atomic percent of a content of Fe and having an activation volume ranging from 1,200 to 1,800 nm³.

Embodiments of the invention provide a method and an apparatus for generating a total harmonic distortion reference signal. A triangle wave having a predetermined frequency and a predetermined amplitude is generated. The triangle wave is filtered to produce a signal substantially consisting of a sinusoid at the predetermined frequency and selected harmonics of predetermined amplitudes.

A sensor device for sensing CO₂ comprises a hybrid sensing material and a transducer. The hybrid sensing material comprises at least amines and nanoparticles, wherein the hybrid sensing material has a property and is configured to change the property dependent on a current CO₂ concentration in the surrounding. The transducer is configured to output an electrical sensor signal dependent on the property of the hybrid sensing material.

The invention discloses modified thermosetting resin and a preparation method thereof. 100 parts of molten state thermosetting resin and 1-20 parts of fluorine-containing-polyimide-b-polysiloxane rigid-flexible segmented copolymer with amino end groups are evenly mixed and undergo a curing and postprocessing process to obtain fluorine-containing-polyimide-b-polysiloxane rigid-flexible segmented copolymer modified thermosetting resin. The modified thermosetting resin has high heat resistance, high toughness, low dielectric constant and good curing manufacturability. The method for preparing the modified thermosetting resin is simple and practical, no solvent is used, and the modified thermosetting resin undergoes large-scale and cleaning production easily.

The invention provides a copper-based methanol synthesis catalyst and a preparation method thereof. The method includes the steps that copper-zinc mixed liquor is mixed with a first precipitator aqueous solution in a parallel flow mode, the pH is controlled to be 7-8, standing is performed for ageing, and slurry A is formed; a second precipitator aqueous solution is added into a soluble aluminum salt aqueous solution, the pH is controlled to be 7-8, the temperature is controlled to be 40-50 DEG C, standing is performed for ageing, and slurry B is obtained; the slurry A and the slurry B are mixed and filtered, a solid phase is washed, dried, roasted and formed, and the copper-based methanol synthesis catalyst is obtained. According to the preparation method, the steps are simple, the controllability is high, the raw material source is wide, and industrialization is easy to achieve; by the adoption of the preparation method, the copper-based methanol synthesis catalyst with high catalytic activity and heat stability can be obtained and is suitable for producing methanol with synthesis gas containing CO, CO2 and H2 under the low temperature and low pressure conditions; besides, the catalyst does not need reduction before use and can be conveniently applied and popularized on a large scale.

A recording layer is formed on a substrate, and a high thermal conductor having a thermal conductivity higher than that of the recording layer is disposed inside a plurality of recording bit regions constituting the recording layer, respectively. Furthermore, the recording layer is formed with a separating portion which divides the recording layer into the plurality of recording bit regions. The separating layer is filled with a low thermal conductor having a thermal conductivity lower than that of the recording layer.

The invention relates to a system that is added to a standard vehicle installed air-conditioning system that allows the standard vehicle installed air-conditioning system to cool and condition the air inside the vehicle without operating the engine of the vehicle. This allows the vehicle to be air-conditioned without polluting the air via continuous operation of the vehicle's (usually) diesel engine. Also, a thermal heating tank is included to warm the electrical components of the system and to ensure improved morning starting of the vehicle's engine. Also, an interiorly operating alternator recaptures some of the energy generated by the system when the air conditioning compressor is disconnected from the electric motor that powers it, but the electric motor remains activated.

The invention discloses a medium-pressure torsion-resistant power cable. The power cable comprises at least one power cable core, at least one grounding cable core twisted with the power cable core, and a sheath layer wrapping the power cable core and the grounding cable core, wherein the power cable core comprises a conductor and an insulating layer covering the conductor; the insulating layer comprises the following components: ethylene propylene diene monomer rubber, microcrystalline wax, paraffin oil, antimony trioxide, titanium dioxide, nano zinc oxide, calcined kaolin, a coupling agent,an anti-aging agent, a vulcanizing agent and a vulcanizing assistant; and the sheath layer comprises the following components: chlorinated polyethylene, magnesium hydroxide, white carbon black, modified calcined kaolin, a thermoplastic elastomer, the anti-aging agent, red lead masterbatch, the antimony trioxide, light magnesium oxide, a calcium-zinc stabilizer, stearic acid, high-wear-resistant carbon black, a plasticizer, a cold-resistant plasticizer, the coupling agent, the vulcanizing agent and a vulcanization accelerator. The problem of the reduced service life of the torsion-resistant power cable of the 8MW offshore wind generating set due to long-term high-load flow, bending fatigue, aging, tearing and the like can be solved.

The invention discloses a SCR nanofilm denitration catalyst, and a preparation method and applications thereof. According to the preparation method, industrial-grade common ceramic with changeable flow morphology is taken as a nanofilm catalyst carrier; a nanoparticle is taken as an auxiliary carrier; a mixture obtained via combination of V2O5 with at least one ingredient selected from PdO, MnO2, and NiO is taken as an active component; CeO2 is taken as a catalytic active ingredient; WO3 is taken as an accessory ingredient; the carrier is subjected to cleaning and drying, and then is delivered into a reflux unit filled with ethidene diamine for surface modification; the auxiliary carrier is prepared into a solution, the modified carrier is added into the solution for pulling film forming; the film-formed carrier obtain via the former step is delivered into a vacuum drying oven so as to realize chemical bond connection of the carrier with the nanoparticle; an obtained product is delivered into a mixed solution of CeO2 and WO3 for pulling film forming; and at last the SCR nanofilm denitration catalyst is obtained via drying. The SCR nanofilm denitration catalyst can be used for removing nitrogen oxides generated in combustors; turbulent flow, rotational flow, and cross flow are caused when air flow is delivered through the SCR nanofilm denitration catalyst; catalyst surface utilization rate is increased by changing flow morphology of the air flow, and catalytic efficiency is increased.