15results about How to "High melting temperature" patented technology

The liquid discharge head includes a nozzle plate, a pressure chamber base plate, a piezoelectric element, and a heater. The nozzle plate has a nozzle. The pressure chamber base plate is disposed on the nozzle plate. The pressure chamber base plate has a pressure chamber communicating with the nozzle. The piezoelectric element is disposed on the portion of the nozzle plate facing the pressure chamber. The piezoelectric element surrounds the nozzle and is driven to deform the nozzle plate, causing liquid in the pressure chamber to be discharged from the nozzle in the liquid discharge direction. The heater is disposed on the portion of the nozzle plate facing the pressure chamber. The heater surrounds the nozzle to heat the liquid in the pressure chamber.

The invention relates to a 700 DEG C high-temperature titanium alloy for medium and short time use and a preparation method thereof, belongs to the technical field of titanium alloy processing, and solves the problem that a medium and short time high-strength titanium alloy resistant to extreme high temperature (700 DEG C) cannot be prepared in the prior art. The 700 DEG C high-temperature titanium alloy for medium and short time use comprises the following components in percentage by weight: 5.5 to 6.5 percent of Al, 3.0 to 5.0 percent of Sn, 5.0 to 8.0 percent of Zr, 0.5 to 1.5 percent of Mo, 0.2 to 1.0 percent of Nb, 0.6 to 0.8 percent of Si, 1.0 to 2.0 percent of W and the balance of Ti. The room-temperature tensile strength Rm is larger than or equal to 1120MPa, the yield strength Rp0.2 is larger than or equal to 1010MPa, the ductility A is larger than or equal to 8%, and the percentage reduction of area Z is larger than or equal to 10%. At 700 DEG C, the tensile strength Rm is larger than or equal to 610 MPa, the yield strength Rp0.2 is larger than or equal to 470 MPa, the ductility A is larger than or equal to 20%, and the percentage reduction of area Z is larger than or equal to 50%. The material can resist the high temperature of 700 DEG C, and has certain medium and short time high temperature durability and fracture toughness. And the requirements of medium and short time limit high-temperature resistance (700 DEG C) high-strength titanium alloy can be met.

The application belongs to the technical field of biomedicine, and specifically discloses an exonuclease Exo III mutant and related application thereof. Single-point or multi-point combined mutations are introduced at the E71L, Q133I, R170W, D188A and R209K sites of the wild-type sequence shown in SEQ ID NO:1, so as to solve the problems of easy deactivation, high background signal and poor storage stability of the wild-type enzyme in isothermal amplification, thereby greatly improving amplification sensitivity and shortening peak time in DNA / RNA isothermal amplification detection such as RPA and RTMA, and endowing the reagent with excellent high-temperature resistance, so that the reagent can be widely applied to gene detection, pathogen screening, bedside detection, environmental monitoring and development of ambient storage type in-vitro diagnostic kits.

The invention belongs to the technical field of plastic extruding machines, and discloses a plastic master batch processing plastic extruding machine and an extruding technology thereof.The plastic master batch processing plastic extruding machine comprises a machine shell, a first feeding hopper is fixedly installed at the top end of the machine shell, a screw is rotationally connected to an inner cavity of the first feeding hopper, a ball screw is meshed with the middle of the screw, and a driving motor is fixedly installed at the right end of the machine shell; a machine head is fixedly installed at the left end of the machine shell, and a bearing is fixedly installed at the right end of the machine head. A sealing ring makes contact with and seals a one-way air pipe, at the moment, due to the fact that air cannot continue to flow into the one-way air pipe, the pressure intensity in an air box is increased to reach the opening pressure of a pressure pipe, and at the moment, air flows towards the pressure pipe, a push shaft is pushed leftwards, and the bottom end of a rotating plate moves upwards; furthermore, the space between the bottom end of the rotating plate and one side wall of the feeding hopper is reduced, the discharging amount of the melt is reduced, the situation that the extrusion pressure is increased is avoided, and the product quality is improved.

The present application relates to the technical field of ceramic tiles, in particular to a dry particle glaze, antibacterial ceramic tile and a preparation method thereof, wherein the dry particle glaze comprises the following preparation raw materials in percentage by mass: 6-9% corundum, 9-12% fused quartz, 6-9% fused zirconium silicate, and the rest is first dry particles and second dry particles with a mass ratio of 1:(1.8-2.2). The dry particle glaze of the present application is prepared by using the first dry particles and the second dry particles with a specific formula, and is matched with corundum, fused quartz and fused zirconium silicate, so as to improve the melting temperature of the dry particle glaze, so that the initial melting temperature is above 1300 DEG C, the surface antibacterial agent is not coated, and the problem of poor wear resistance of the conventional antibacterial glaze is avoided.

The invention discloses a full-degradable ultraviolet barrier film material as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing polycaprolactone triol with isophorone diisocyanate, adding a catalyst and a solvent, heating and stirring to obtain a polyurethane prepolymer solution; and adding an ultraviolet absorbent into the polyurethane prepolymer solution, heating and stirring, removing bubbles and drying to obtain the full-degradable ultraviolet barrier film material. According to the method, chlorogenic acid is added in the process of preparing the film material by taking polycaprolactone triol and isophorone diisocyanate as raw materials, so that the prepared full-degradable ultraviolet barrier film material has an anti-ultraviolet effect; meanwhile, the tensile strength, the elongation at break, the antioxidant activity, the thermal stability, the melting temperature and other properties of the thin film material prepared only from the polycaprolactone triol and the isophorone diisocyanate can be improved; wide application prospects are realized.

The invention discloses a method for preparing a titanium-based high-entropy amorphous alloy with high thermal stability, and belongs to the technical field of high-entropy alloy preparation. The titanium-vanadium-zirconium-niobium-tantalum-molybdenum-boron high-entropy amorphous alloy film of the invention comprises the following chemical components in molar parts: 47.3 parts of Ti, 25 parts of V, 11 parts of Zr, 14 parts of Nb, 2 parts of Ta, 0.5 parts of Mo and 0.2 parts of B. The preparation method comprises the following steps: mixing the chemical components in proportion, smelting, and obtaining a high-entropy alloy target: using a single crystal silicon wafer as a substrate, sputtering the high-entropy alloy target on the surface of the single crystal silicon wafer by a magnetron sputtering method, and obtaining the titanium-vanadium-zirconium-niobium-tantalum-molybdenum-boron high-entropy amorphous alloy film. The invention provides a method for preparing a high-entropy amorphous alloy film with high thermal stability, which solves the problem that the high strength of amorphous alloys cannot be maintained at high temperatures, and has excellent practical value and research value.

The invention relates to low-temperature fired white Yellow River sediment microcrystalline glass and a preparation method thereof. The low-temperature fired white Yellow River sediment microcrystalline glass comprises the following raw materials: 50-65% of Yellow River sediment, 15-25% of CaCO3, 5-10% of dolomite, 3-10% of silica sand, 1-5% of Na2SiF6, 1-5% of K2CO3, 1-5% of chromite and 1-5% of TiO2. B2O3-CuO accounting for 1%-4% of the total weight of the raw materials is added. The preparation method comprises the following steps: (1) melting raw materials to obtain basic molten glass; (2) molding the molten glass to obtain a glass plate; and (3) coring and crystallizing the glass plate, and then carrying out post-treatment. The microcrystalline glass is prepared by firing the Yellow River silt at low temperature, a new way is provided for high-value utilization of Yellow River silt resources, and the product is high in quality and low in cost and has a wide application prospect.

The present invention relates to a cable comprising at least one layer comprising a polypropylene composition; the present invention relates to a polypropylene composition comprising a copolymer of propylene and comonomer units selected from ethylene and alpha-olefins having from 4 to 12 carbon atoms wherein the polypropylene composition has a total comonomer content (preferably total ethylene content) of from 4.0 to 11.0 wt%, based on the total weight of the polypropylene composition, the content is determined according to the Crystallization Extraction Method (CRYSTEX) by FT-IR spectroscopy calibrated by a quantified 13C-NMR spectrum; a melt flow rate MFR2 of greater than 2.5 to 6.0 g / 10 min as determined according to ISO 1133 at 230 DEG C and a load of 2.16 kg; a soluble fraction (SF) content of from 10.0 to 25.0 wt%, based on the total weight of the polypropylene composition, as determined by Crystallization Extraction Method (CRYSTEX); and a flexural modulus of greater than 470 MPa to 750 MPa as determined according to ISO 178 method A.

The present application relates to a kind of wear-resistant hydrophobic coating and its preparation method, belong to the technical field of A.A kind of preparation method of wear-resistant hydrophobic coating includes the following steps: the metal substrate after cleaning is pretreated, is placed in vacuum coating furnace and is preheated, ion etching, using Ti-Cr composite target material is carried out Ti-Cr composite sputtering treatment, WC target sputtering treatment, then carries out multi-arc ion plating deposition ta-C layer processing and multi-arc ion plating deposition F-ta-C layer processing, then carries out heat treatment, that is, preparation is completed.The present application is prepared by introducing titanium powder, forming solid solution between metal substrate and chromium, and forming a variety of component stable compounds on its surface, titanium is used as intermediate layer, provides support force, makes each layer element gradient distribution, improves the binding force between chromium element and glass matrix, improves the compactness and uniformity of metal substrate, improves the wear resistance of metal mold, reduces segregation phenomenon.

The application belongs to the field of metal material high-temperature alloy, and discloses a low-density cobalt-based high-temperature alloy with high elongation and high oxidation resistance and a preparation method. The cobalt-based high-temperature alloy comprises Co, Ni, Al, Ti, Ta, Cr, B, Zr and inevitable impurity elements; the atomic percentage of each element is as follows: 20-40% of Ni, 5-15% of Al, 1-15% of Ta, 0-2% of Ti, 5-12% of Cr, 0-1% of B, 0-1% of Zr, and the rest is Co and inevitable impurity elements. The application significantly improves the plasticity and oxidation resistance of the alloy by adding micro-alloying elements and corrosion-resistant Cr elements, and reduces the density of the alloy by removing the W element in the gamma'-Co3(Al, W) phase.

KLRB1 binding agents, particularly anti-KLRB1 antibodies and antigen binding portions thereof, and compositions thereof, and methods of using such agents, such as depleted or suppressor or activated cells, particularly Th17, Th17.1, ex-Th17, Tc17, MAIT, iNKT, peTh2, ILC2, ILC3, NK cells and / or neoplastic T cells or NK cells in vivo, for the treatment of autoimmune diseases, allergic diseases, graft rejection, hematological malignancies, and cancers.

The invention relates to a preparation method of a flame-retardant washable water-based acrylate resin coating with moderate compatibility, which comprises the following steps: adding water, an emulsifier and methacrylic acid, stirring to react for 60 minutes, adding a monomer A, a charring agent intermediate, DOPO and 3, 4-epoxy-1-butene, and emulsifying for 20-30 minutes; heating to 80-90 DEG C, dropwise adding an initiator, reacting for 1-2 hours, adding diethanol amine, and reacting for 1-2 hours to obtain a core-layer emulsion; the preparation method comprises the following steps: adding a monomer A and a monomer B into a reaction kettle, dropwise adding a monomer B and an initiator at the same time, keeping the temperature at 75-85 DEG C, stirring and reacting for 1.5 hours, adding DOPO, 3, 4-epoxy-1-butene and an initiator, reacting for 1 hour at 60-70 DEG C, cooling to 50 DEG C, adding an emulsifier B, reacting for 30 minutes, and adding ammonia water to adjust the pH value to 7-8, so as to obtain the flame-retardant washable water-based acrylate resin coating with moderate compatibility, and the obtained acrylate resin has good flame retardance and washability.

The invention belongs to the technical field of chemical engineering and energy materials, and particularly relates to a method for improving the freezing point of a saline solution and application thereof. According to the method, a saline solution and hydrophobic fumed silica are mixed, so that the saline solution enters gaps of nano-scale particles, and a solid ice phase is formed and stabilized under normal pressure and at the temperature higher than 273 K. The hydrophobic fumed silica is preferably modified with an alkylsilane compound, and an organic additive can also be added to fill gaps among particles. The method breaks through the limitation that the ice phase melts at 0 DEG C, the melting temperature of the ice can be remarkably increased, the metastable state ice content is greatly increased, the process is simple, and operation is convenient. The composite system formed by the method can be used for preparing gas hydrates, realizes high-efficiency storage of gas under the conditions of normal pressure and temperature above zero, and provides a brand-new technical solution for storage and transportation of clean energy such as natural gas and the like.

This invention discloses a low-melting-point, high-barrier semi-aromatic polyamide copolymer, prepared by adding an antioxidant stabilizer and a nucleating agent to the following raw materials in parts by weight: 39-45 parts aromatic diamine, 10-32 parts adipic acid, and 23-51 parts long-chain aliphatic dicarboxylic acid; the antioxidant stabilizer and nucleating agent are added at 0.1-1% and 0.0001-0.1% of the total weight of the above raw materials, respectively; this invention also further discloses a method for preparing the copolymer. Compared with the prior art, the low-melting-point, high-barrier semi-aromatic polyamide copolymer provided by this invention has good mechanical properties and barrier properties, good flowability, and excellent processing performance. It can be added to low-melting-point polymers with a processing window of 140-190℃ to improve barrier properties, or it can be used alone as a barrier material.