232results about How to "Lower transition temperature" patented technology

A phase change memory cell includes first and second electrodes having generally coplanar surfaces spaced apart by a gap and a phase change bridge electrically coupling the first and second electrodes. The phase change bridge may extend over the generally coplanar surfaces and across the gap. The phase change bridge has a higher transition temperature bridge portion and a lower transition temperature portion. The lower transition temperature portion comprises a phase change region which can be transitioned from generally crystalline to generally amorphous states at a lower temperature than the higher transition temperature portion. A method for making a phase change memory cell is also disclosed.

Described are polyester compositions comprising at least one polyester which comprises terephthalic acid residues, 2,2,4,4-tetramethyl-1,3-cyclobutanediol, and cyclohexanedimethanol, wherein the inherent viscosity and the Tg of the polyester provides for certain polyester properties. The polyesters may be manufactured into articles such as fibers, films, bottles or sheets.

Described are polyester compositions comprising at least one polyester which comprises terephthalic acid residues, 2,2,4,4-tetramethyl-1,3-cyclobutanediol, and 1,4-cyclohexanedimethanol, wherein the inherent viscosity and the Tg of the polyester provides for certain polyester properties. The polyesters may be manufactured into articles such as fibers, films, bottles or sheets.

The invention discloses automobile beam steel with tensile strength of 590MPa and a manufacturing method thereof. The steel comprises the following components in percentage by weight: 0.07-0.13 C, 0.10-0.30 Si, 1.30-1.60 Mn, at most 0.025 P, at most 0.008 S, 0.015-0.070 Al, 0.025-0.050 Nb, 0.020-0.040 Ti, and the balance of Fe and unavoidable impurities. The manufacturing method comprises the technical steps of molten iron desulfuration, bessemerizing, alloying, vacuum treatment, continuous casting, hot tandem rolling, Laminar cooling, reeling and finishing. Proved by practices, the automobile beam steel has stable chemical compositions and mechanical property as well as good cold forming performance and surface quality and completely meets the requirement for manufacturing novel frame structures of heavy-duty trucks and large vans.

Provided is an optical glass that has high-refractivity and high-dispersion properties and can give preforms for press-molding, which are excellent in shapability at high temperatures and suitable for precision press-molding.

The optical contains, as essential components, 25 to 45 mol % of B₂O₃, 2 to 20 mol % of SiO₂, 5 to 22 mol % of La₂O₃, 2 to 20 mol % of Gd₂O₃, 15 to 29 mol % of ZnO, 1 to 10 mol % of Li₂O and 0.5 to 8 mol % of ZrO₂, the optical glass having a B₂O₃/SiO₂ molar ratio of from 2 to 5.5 and having an La₂O₃ and Gd₂O₃ total content of 12 to 24 mol % and a ZnO and Li₂O total content of 25 to 30 mol %, the optical glass having a refractive index (nd) of 1.75 to 1.85 and an Abbe's number (νd) of 40 to 55, or the optical glass contains, as essential components, B₂O₃, SiO₂, La₂O₃, Gd₂O₃, ZnO, Li₂O and ZrO₂ and has a viscosity of at least 6 dPa·s at a liquidus temperature thereof, a glass transition temperature (Tg) of 600° C. or lower, a refractive index (nd) of 1.75 to 1.85 and Abbe's number (νd) of 40 to 55.

Alloy particles of an alloy having a face-centered cubic structure comprise at least one selected from Fe and Co and at least one selected from Pt and Pd as principal components. The alloy particles have a TEM-measured average grain size (D_TEM) of not more than 50 nm, and a single crystallinity (D_TEM)/(D_X) that is less than 1.50, where (D_X) is X-ray crystallite size. These alloy particles can be advantageously manufactured by using the polyol process to synthesize the alloy particles in the presence of a complexing agent.

An optical glass suitable for mold forming at a low temperature including, in percent by weight, 9-25 percent of P₂O₅, 1-20 percent of GeO₂, 12-28 percent of Nb₂O₅, 1-7 percent of TiO₂, 0-55 percent of Bi₂O₃, 0-38 percent of WO₃, 0-3 percent of SiO₂, 0-5 percent of B₂O₃, 0-2 percent of Al₂O₃, 0-5 percent of Li₂O, 0-11 percent of Na₂O, 0-5 percent of K₂O, 0-3 percent of Ta₂O₅, 0-1 percent of Sb₂O₃, at most 13 percent of at least one R₂O selected from the group consisting of Li₂O, Na₂O and K₂O, and at most 15 percent of at least one XO selected from the group consisting of CaO, SrO, BaO and ZnO. The optical glass essentially contains no environmental and human harmful components, facilitates mass production and is stable against devitrification near its softening temperature.

The invention relates to low melting point optical glass, belonging to the low melting point optical glass without lead, arsenic, bismuth and fluorine, which resolves the problem that the existing optical glass has high transformation temperature, insufficient chemical stability, big glass specific weight and the like. the technical scheme of the invention is that the content of percentage by weight comprises: P2O5 holding 18-40%, Nb2O5 holding 20-40%, TiO2 holding 0-10%, WO3 holding 0-15%, B2O3 holding0-15%, R2O holding 10-45%, RO holding 0-20%, Sb2O3 holding 0-1% and total content holding 100%. The glass of the invention does not contain lead, arsenic, bismuth and fluorine, the transformation temperature of which is low (Tg < 500DEG C), the glass is adaptable to precise compression, the refractive index is 1.65-1.85, Abbe number is 20-35, chemical stability is good, bending and separation property is good, and the glass is easy in melting and processing, low in density and comparatively light in color.

A biomaterial for treating or preventing congestive heart failure is injected into the intrapericardial space of a patient's heart to apply a mild compressive force on the heart. A volume of biomaterial is placed in the intrapericardial space by an injection needle or catheter, adjacent at least the left ventricle, so that the biomaterial applies a compressive force on the myocardium to relieve cardiac wall tension during at least a portion of the cardiac cycle.

Described as one aspect of the invention are polyesters containing (a) a dicarboxylic acid component having from 70 to 100 mole % of terephthalic acid residues and up to 30 mole % of aromatic dicarboxylic acid residues or aliphatic dicarboxylic acid residues; and (b) a glycol component having from 11 to 25 mole % of 2,2,4,4-tetramethyl-1,3-cyclobutanediol residues, and 75 to 89 mole % of 1,4-cyclohexanedimethanol residues; wherein the total mole % of the dicarboxylic acid component is 100 mole %, and the total mole % of the glycol component is 100 mole %. The polyesters may be manufactured into articles.

The invention provides a hot rolling process capable of improving high-grade thick pipeline steel fracture toughness, sequentially comprising a plate blank reheating section process, a hot rolling section process, a plate reeling section process and a cooling section process, wherein the concrete processing parameters of each process are as follows: in the plate blank reheating section process, the plate blank heating temperature is equal to T solid solution plus 30-80 DEG C, the relation between in-furnace time and blank thickness is that the total in-furnace time is equal to 0.5t plus 30-50min, and the temperature difference of the upper surface and the lower surface after the plate blank is reheated is less than or equal to 30 DEG C; and in the hot rolling section process, the single track down rate in rough rolling is more than or equal to 15%, the accumulated down rate in fine rolling is more than or equal to 70%, and the finished rolling temperature is equal to Ar3 plus 0-60 DEG C, wherein Ar3 is a phase transformation point temperature. By utilizing the hot rolling process provided by the invention, the problem that DWTT (drop weight tear test) control is difficult to carry out on X70 and X80 steel more than 15mm can be effectively solved. The hot rolling process provided by the invention is practical and feasible and produces less loss on a rolling machine, a reeling machine and the like, and the qualifying rate of the DWTT properties of a product can reach up to more than 99%.

The invention relates to a leadless low-melting-point bismuthate glass and a corresponding preparation method. The glass consists of Bi2O3 (20 to 75), B2O3 (10 to 50), BaO (0 to 20), Ga2O3 (0 to 20), La2O3 (0 to 10), Sb2O3 (0 to 5), SiO2 (0 to 15), TiO2 (0 to 5), ZrO2 (0 to 5), Nb>O5 (0 to 5), Ta2O5 (0 to 5) and CeO2 (0 to 1). The glass of the invention is provided with glass transition temperature T<g> which is less than or equal to 395.8 DEG C, and a thermal stability parameter Delta T which is greater than or equal to 88 DEG C, and the refractive index n<d> which is up to 2.182; and the highest transmittance can reach 80 percent in a wave range between 400nm and 1600nm. The glass is suitable to be adopted as material with low fusion-point and high refractive index.

The invention discloses a preparation method of a polymer-added composite cathode and application of the composite cathode in a solid-state battery. The composite cathode is characterized by comprising a composite cathode pole piece and a solid-state electrolyte material, wherein the composite cathode pole piece is prepared from a cathode active material, an additive, a conductive agent and a binder; the solid-state electrolyte material is prepared from a high-molecular polymer with a long chain segment, lithium salt conducting a coordination reaction with the high-molecular polymer, and a fast ion conductor. The invention also discloses a preparation method of the polymer-added composite cathode applied to a solid-state lithium battery. The preparation method is characterized by comprising the following steps: preparing a cathode pole piece, preparing a solid-state electrolyte membrane. The preparation method disclosed by the invention has the following advantages: the arrangement regularity of polyoxyethylene molecular chains is damaged by the effect among the molecular chains of several polymers, the glass-transition temperature is lowered, the crystal formation is inhibited, and the ionic conductance is enhanced.

Optical glasses are described, which are useful for imaging, sensors, microscopy, medical technology, digital protection, photolithography, laser technology, wafer/chip technology, as well as telecommunication, optical communications engineering and optics/lighting in the automotive sector, with a refractive index of 1.80≦n_d≦1.95 and an Abbe value from 19≦ν_d≦28 with excellent chemical resistance and stability to crystallization. These optical glasses have a composition, in weight % based on oxide content, of: P₂O₅, 14-35; Nb₂O₅, 45-50; Li₂O, 0-4; Na₂O, 0-4; K₂O, 0.5-5; BaO, 17-23; ZnO, 0.1-5; TiO₂, 1-<5; ZrO₂, 06; and Sb₂O₃, 0.1-2.