13results about How to "Guaranteed low temperature stability" patented technology

The invention provides a sandwich multi-layer high-entropy lead-free dielectric material and a preparation method thereof, belongs to the technical field of energy storage ceramics, and aims to solve the technical problems that multi-layer ceramics are not compact in sintering, low in breakdown-resistant field strength and relatively low in energy storage performance. The sandwich multilayer high-entropy lead-free dielectric material comprises an upper dielectric layer, a lower dielectric layer and a middle high-entropy dielectric ceramic layer, the upper dielectric layer and the lower dielectric layer are both made of Mg2SiO4, and the high-entropy dielectric ceramic layer is made of Ba < 0.2 > Sr < 0.2 > Na < 0.2 > Bi < 0.2 > Ca < 0.2 > Ti < 0.25 > Ti < 0.25 > Nb < 0.25 > Zr < 0.25 > Mg < 0.25 > O < 3 >. The sandwich multi-layer high-entropy lead-free dielectric material prepared by the method has relatively high density, relatively high breakdown-resistant field strength, relatively high dielectric property, relatively high energy storage density and good discharge efficiency, the breakdown-resistant field strength reaches 1200 kV / cm, the maximum energy storage density reaches 6 J / cm < 3 >, and meanwhile, the sandwich multi-layer high-entropy lead-free dielectric material has relatively good temperature stability. The method has the advantages of simplicity, feasibility, low cost, convenience, rapidness, large-scale production and the like.

The invention provides a high energy storage density AgNb0. 5Zr0. 25Mg0. 25O3 / ZrSiO4 composite ceramic and a preparation method thereof, belongs to the technical field of ceramic materials, and aims to solve the technical problems of low breakdown field strength resistance and low energy storage density of energy storage ceramics. According to the preparation method, the energy storage performance of silver niobate ceramic is improved by adopting a method of combining B-site ion doping with second-phase compounding, firstly, AgNb0. 5Zr0. 25Mg0. 25O3 and ZrSiO4 nano powder is prepared through a microwave hydrothermal reaction method, and the AgNb0. 5Zr0. 25Mg0. 25O3 / ZrSiO4 composite ceramic is obtained through an oscillation pressure sintering method. The prepared AgNb0. 5Zr0. 25Mg0. 25O3 / ZrSiO4 composite ceramic with high energy storage density has relatively high breakdown field strength, relatively high dielectric property, energy storage density and good discharge efficiency, the breakdown field strength reaches 750kV / cm, the maximum energy storage density reaches 7.73 J / cm < 3 >, and meanwhile, the composite ceramic has relatively good temperature stability. The AgNb0. 5Zr0. 25Mg0. 25O3 / ZrSiO4 composite ceramic prepared by the method has the advantages of low cost, nanoscale particles, excellent energy storage performance and the like, is suitable for large-scale production, and shows good application prospects in pulse power energy storage capacitors.

The invention provides a low-power-consumption low-voltage detector, which relates to the technical field of detectors and comprises a detection branch, a bias branch and an output shaping module, the first end of the detection branch is connected with power supply voltage, the second end is connected with the bias branch, and the detection branch is used for outputting an overturning signal when the power supply voltage reaches set detection voltage; the bias branch is used for providing stable bias voltage for the detection branch and has a temperature compensation function; and the output shaping module is connected with the output end of the detection branch and is used for shaping the overturning signal and then outputting a detection signal. In the mode, ultralow detection voltage, ultralow power consumption, temperature stability, high process angle robustness and small chip area are realized, and the detection voltage is programmable.

This invention belongs to the field of electronic information materials technology, and discloses a (In 1 / 3 Mo 2 / 3 ) 5+ Cobalt niobate-doped microwave / terahertz dielectric ceramics and their preparation methods, with the general chemical formula CoNb 2‑x (In 1 / 3Mo 2 / 3 ) x O6, 0.01 ≤ x ≤ 0.03; This material has a single orthorhombic niobite structure with space group Pbcn. Its preparation method involves weighing and mixing CoO, Nb2O5, In2O3, and MoO3 raw materials through ball milling; drying the ball-milled slurry, adding a binder for granulation, sieving, and pressing into green bodies; sintering the green bodies after debinding to obtain the indium-molybdenum composite ion-doped cobalt niobate dielectric ceramic. It exhibits low dielectric loss and moderate dielectric constant in the terahertz band, filling the gap in existing research on the dielectric properties of cobalt niobate dielectric ceramics in the terahertz band. Furthermore, the material's preparation process is simple, the sintering temperature is moderate, it is compatible with existing ceramic processes, suitable for industrial production, and has broad application prospects in next-generation microwave / terahertz communication devices.

The present invention relates to a polymer composition applicable as a latex stabilizer of a latex composition for dip molding, a method for preparing the same, a latex composition for dip molding, including the same to have improved latex stability, and a molded article molded therefrom to have improved wearability and tensile properties.

The invention provides a cold recycled asphalt mixture based on a light base oil regenerant, and belongs to the technical field of recycled asphalt, the oil regenerant is composed of the following components by weight: 70-80 parts of light base oil, 12-17 parts of a plasticizer, 6-8 parts of a penetrant, and 2-4 parts of an anti-aging agent. A thermogravimetric analysis test shows that the prepared regenerant has relatively high aromatic content and relatively low asphaltene content, and can adjust the balance of components in asphalt, so that the missing components in the aged asphalt are supplemented to reach the degree of matching with new asphalt; on the basis of strength, the optimal mixing amount of the regenerant is determined through an asphalt mixture splitting test and a compression test, and when the mixing amount of the light base oil regenerant is 0.6%, the mechanical strength improvement effect is optimal; the high-temperature stability and the low-temperature crack resistance of the recycled asphalt mixture are reduced due to the increase of the mixing amount of the recycled asphalt mixture, but the recycled asphalt mixture still meets the requirements of regeneration specifications.

The invention discloses a thick-film resistor with high strain sensitivity and low temperature sensitivity and a preparation method thereof, and belongs to the technical field of functional materials, electronic elements and sensors. The preparation problem of the thick-film resistor with high strain sensitivity and low resistance temperature coefficient is solved. The preparation method comprises the following steps: weighing lead oxide, boron oxide and silicon dioxide, uniformly mixing, completely melting into molten glass, carrying out water quenching, and carrying out ball milling on the water-quenched glass slag to obtain lead borosilicate glass powder; weighing RuO powder and lead borosilicate glass powder, adding an organic carrier, mixing, adding into a three-roller grinder, and fully grinding to be fine and uniform, so as to obtain resistance paste; and coating a cleaned substrate with the resistance paste in a silk-screen printing manner, and in an air atmosphere, controlling the sintering peak temperature within the range of 750-950 DEG C and the heat preservation time of the sintering peak temperature within the range of 10-360 minutes to obtain the thick-film resistor with both high strain sensitivity and low temperature sensitivity.

This invention discloses an energy-saving grinding component for a sand mill, comprising an equipment housing containing a cooling tank, a grinding chamber located above the equipment housing, a spiral cooling cavity within the grinding chamber, a feeding pipe and a discharge pipe on the grinding chamber, and a cover fixedly mounted on the top of the equipment housing on one side of the grinding chamber. This invention improves the contact shearing efficiency between the grinding chamber and the material and grinding media beads through the coordinated operation of a cam, hollow shaft, grinding drum, and pin, achieving material grinding. Heat exchange is achieved between the cooling water in the spiral cooling cavity and the grinding chamber, enabling temperature control while recycling water resources. It also allows the warm water after heat exchange to quickly and thoroughly mix with the low-temperature cooling water and cooling elements, agitating the water to break up temperature stratification, ensuring the low-temperature stability of the return cooling water, and continuously guaranteeing the cooling effect. The entire process is driven by a single power source, balancing cooling efficiency and energy saving.

This invention provides a fireproof and insulated door core and its filling process. The core is obtained by filling a door frame with a wet core material, followed by compression molding and curing. The wet core material, by weight, comprises: 4-12 parts closed-cell expanded perlite, 6-18 parts active magnesium oxide, 10-30 parts a 25%-35% (calculated as anhydrous magnesium sulfate) magnesium sulfate aqueous solution, 0.1-0.3 parts a modifier, 0.3-1.2 parts biomimetic interface hybrid modified reinforcing fibers, and 0.1-0.3 parts calcium stearate. The fireproof and insulated door core provided by this invention has low density and good thermal insulation performance, high matrix strength, density, and high-temperature stability, good flexural and impact resistance, low water absorption, good moisture resistance, and excellent overall fireproof and thermal insulation performance.

This application relates to the field of chip testing, and in particular to a test board, a test machine, and a test system for a tester. The test board includes a BE board, a PCB board, and a heat sink, stacked sequentially from bottom to top. The PCB board includes at least one test channel, which includes an analog area and a power area. A temperature sensor is provided in the analog area, and at least one heating element corresponding to the power area is provided on the heat sink. A control module is provided on the BE board, which is electrically connected to the temperature sensor and the heating element. The control module is used to acquire the temperature data of the analog area collected by the temperature sensor and to control the heating element according to the temperature data to keep the temperature of the analog area stable within a set range. This application uses air cooling coupled with active temperature control to control the temperature of the analog area, reducing the temperature drift of heat-sensitive devices in the test board during actual operation, thereby improving the output performance of the test board.

The invention belongs to the technical field of pesticide preparations, and particularly relates to a plant essential oil compounded insecticidal missible oil agent and a preparation method thereof. The peppermint essential oil and the cinnamon essential oil are processed to form a plant essential oil compound, the plant essential oil compound is combined with other functional components including the sulfonated polyethylene glycol and the chitosan modified carboxymethyl cellulose for common use, the plant essential oil compounded insecticidal missible oil agent is prepared, and by means of the synergistic effect of the multiple components, the synergistic effect is achieved; good heat storage stability and low-temperature stability of the insecticidal emulsifiable concentrate are ensured, and meanwhile, the insecticidal efficacy is improved.

This invention provides a high dielectric constant pulse energy storage ceramic composition and its preparation method, relating to the field of energy storage ceramic materials technology. The ceramic composition uses Ba(Zr) x Ti 1‑x The main component is a perovskite compound (Bi2O3). In addition, it contains Bi as a first secondary component (a composite of Bi2O3 and Bi2O3·nTiO2), and Ca, Sr, Mg, Mn, and Si as secondary components. The ceramic composition of this invention possesses a high dielectric constant (over 900), low dielectric loss, high breakdown field strength, and fine grain structure, making it suitable for high energy density, miniaturized pulse power capacitors.

This utility model discloses an integrated electrode cleaning and drying device for a general-purpose surface charge measuring instrument, belonging to the field of electrode cleaning technology. It includes a cleaning cup for cleaning and drying electrodes, comprising a top sleeve and a washing tank. The top sleeve is connected to a water inlet connector and an air inlet connector. The top sleeve is fitted onto the upper end of the washing tank, and a drain connector is connected to its bottom end. The top sleeve has an inlet channel, an inlet annular groove, an air inlet channel, and an air inlet annular groove. The inlet annular groove connects to the water inlet connector and the inlet annular groove. The air inlet channel connects to the air inlet connector and the air inlet annular groove. The washing tank has an outlet channel, an outlet channel, an open chamber, and a drain channel. The outlet channel connects to the inlet annular groove and the open chamber. The outlet channel connects to the air inlet annular groove and the open chamber. The drain channel connects to the open chamber and the drain connector. This integrated electrode cleaning and drying device uses pure water rinsing and room temperature air drying to ensure rapid and thorough cleaning of the electrodes, meeting the electrode cleaning and drying requirements of a general-purpose surface charge measuring instrument.