8results 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 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 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 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.

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.