9results about How to "Lower transition temperature" patented technology

The invention relates to a solid electrolyte, a composite positive electrode, a preparation method of the composite positive electrode and an ultra-fast charging type all-solid-state battery, and belongs to the technical field of solid-state batteries. The formula 1 is Li < x > Al < alpha > M < beta > X < y > O < z >, X is halogen, M is a trivalent element except Al, the ratio of x to (alpha + beta) is (1-5): 1, the ratio of alpha to (alpha + beta) is (0.5-1), and the ratio of x to z is (1.25-5). The solid electrolyte provided by the invention is low in glass transition temperature and melting point, has viscoelasticity and relatively high ionic conductivity, and can be fused and cast together with a positive electrode material to form a composite positive electrode at a relatively low temperature, and relatively good interface contact (surface-to-surface contact) can be formed between the positive electrode and the solid electrolyte only by applying relatively small external force; according to the all-solid-state battery, the problem that rigid contact between the solid electrolyte and the positive electrode in the existing all-solid-state battery causes poor ion transmission network and further affects the battery performance is solved, the ion transmission efficiency and the charge-discharge rate performance of the solid-state battery are improved, and rapid and ultrafast charging can be realized.

The invention discloses optical glass, a glass prefabricated part, an optical element and an optical instrument, and relates to the technical field of optical glass. The optical glass comprises the following components in percentage by weight: 1-15% of SiO2; 5 to 25 percent of B2O3; the content of La2O3 is 35%-60%; 4 to 25 percent of Y2O3; zrO2: 2%-15%; 3 to 20 percent of Nb2O5; 0 to 10 percent of Gd2O3; 0 to 10 percent of TiO2; 0 to 5 percent of Ta2O5; 0-8% of RO; 0 to 8% of Rn2O; 0 to 5 percent of WO3; znO: 0 to 10%; 0 to 8 percent of Al2O3; 0 to 10 percent of Yb2O3; 0 to 5 percent of GeO2; 0-2% of a clarifying agent; the ratio of (Y2O3 + Nb2O5) / La2O3 is 0.2 to 1.0; rO is one or more of MgO, CaO, SrO and BaO; the Rn2O is one or more of Li2O, Na2O and K2O; and the clarifying agent is one or more of Sb2O3, SnO, SnO2 and CeO2. The optical glass provided by the invention has relatively high hardness and light transmittance.

The invention discloses optical glass, a prefabricated member thereof, an optical element and an optical instrument, and relates to the technical field of optical glass. The optical glass comprises the following components in percentage by weight: 2 to 15.2 percent of SiO2; 8 to 22 percent of B2O3; la2O3: 40% to 60%; 3 to 18 percent of Y2O3; zrO2: 1%-15%; 2 to 15 percent of Nb2O5; 0 to 9 percent of Gd2O3; znO: 0 to 10%; 0 to 10 percent of Ta2O5; 0 to 6 percent of TiO2; 0 to 10% of RO; 0 to 8% of Rn2O; 0 to 8 percent of WO3; 0 to 5 percent of Al2O3; 0 to 8 percent of Yb2O3; 0 to 5 percent of GeO2; 0-1% of a clarifying agent; (Gd2O3 + ZnO) / Y2O3 is 2.0 or less; the thermal expansion coefficient alpha-30 / 70 DEG C of the optical glass is below 85 * 10 <-7 > / K, and the abrasion degree FA is 75-120. The high-refractive-index optical glass obtained by the invention has relatively low thermal expansion coefficient and excellent abrasion degree.

The invention belongs to the technical field of metallurgy, and particularly relates to 590MPa-grade hot galvanizing dual-phase steel and a production method thereof, and the steel comprises the following chemical components in percentage by mass: 0.02%-0.06% of C, 0.01%-0.03% of Si, 0.90%-1.8% of Mn, less than or equal to 0.025% of P, less than or equal to 0.010% of S, 0.005%-0.010% of Al, 0.05%-0.30% of Cr, 0.05%-0.30% of Mo, less than or equal to 0.0060% of O, 0.010%-0.020% of N, and the balance of Fe and inevitable impurities. The method has the advantages that low carbon-silicon-aluminum and high nitrogen are cooperatively regulated and controlled in component design, and in the hot rolling process, premature precipitation of AlN particles in the hot rolling process is effectively inhibited by controlling the low coiling temperature, so that a large amount of nitrogen is reserved in a hot rolled plate in a solid solution state.

The invention discloses optical glass, a prefabricated member thereof, an optical element and an optical instrument, and relates to the technical field of optical glass. The optical glass comprises the following components in percentage by weight: 5-25% of SiO2 and B2O3; 45 to 70 percent of La2O3, Y2O3 and Gd2O3; zrO2: 2%-15%; 1 to 15% of Nb2O5; 5%-20% of TiO2; 0 to 5 percent of Ta2O5; 0 to 10% of RO; 0 to 8% of Rn2O; 0 to 5 percent of WO3; znO: 0 to 10%; 0 to 8 percent of Al2O3; 0 to 10 percent of Yb2O3; 0 to 5 percent of GeO2; 0-2% of a clarifying agent; wherein the ratio of the Nb2O5 to the Y2O3 is 0.1 to 2.0; rO is one or more of MgO, CaO, SrO and BaO; the Rn2O is one or more of Li2O, Na2O and K2O; and the clarifying agent is one or more of Sb2O3, SnO, SnO2 and CeO2. The optical glass provided by the invention has higher Young modulus and hardness while having expected refractive index and Abbe number.

The invention discloses low-density high-strength high-wear-resistance steel and a heat treatment preparation method thereof, and belongs to the technical field of metal materials. The low-density high-strength high-wear-resistance steel comprises the following components in percentage by weight: 0.35 to 0.4 percent of C, 6 to 7 percent of Mn, 5.5 to 6 percent of Al, 1.2 to 1.3 percent of Si, 0.3 to 0.4 percent of V, 0.03 to 0.035 percent of Nb, 0.002 to 0.003 percent of B and the balance of Fe and inevitable impurities. According to the steel with high strength, high wear resistance and low density and the preparation method thereof, the steel is characterized by being martensite and a small amount of austenite, the density of the steel prepared through the method is 7.0-7.2 g / cm < 3 >, the tensile strength reaches 2000 MPa or above, the yield strength reaches 1200 MPa or above, the Vickers hardness reaches 470 HV or above, and meanwhile the high wear resistance is achieved.

The invention belongs to the field of alumina powder preparation, and particularly relates to a method for preparing spherical Al2O3 nanocrystals at low temperature, which mainly comprises the following steps: S1, preparing a porous material; s2, preparing a carboxyl precursor; s3, preparing an aluminum oxide precursor; and S4, calcining the precursor to obtain the spherical nano aluminum oxide. The preparation method comprises the following steps: grafting carboxyl into a porous material to obtain a carboxyl precursor material, adsorbing boehmite with a proper particle size on the surface of a pore channel by virtue of a relatively large specific surface of the porous material, replacing an aluminoxane precursor with carboxylic acid, and decomposing or carbonizing the carboxyl precursor by virtue of subsequent one-step high-temperature pyrolysis, so as to obtain the porous material. Partially decomposed long-chain organic groups or degraded carbides thereof can inhibit too fast growth of aluminum oxide particles and reduce the transformation temperature of an alpha-Al2O3 phase, and spherical nano alpha-Al2O3 with the size of 20-30 nm can be obtained.

The present application provides an optical glass, a preparation method thereof and an optical element, the optical glass comprising the following composition in terms of cationic mole percentage: Si 4+ : 0~6%; B 3+ : 40~50%; La 3+ : 15~25%; Y 3+ : 0~5%; Ti 4+ : 4.5~8.5%; Nb 5+ : 0~5%; W 6+ : 0~2%; Zr 4+ : 0~5%; Zn 2+ : 10.5~16.5%; Li + : 2~5%; Na + : 0~5%; K + : 0~5%; Sb 3+ : 0~0.1%; the optical glass has a refractive index n d of 1.85~1.88, an Abbe number υ d of 32~36, and a transition temperature Tg lower than 600℃. The optical glass provided by the present application has low density, high transmittance, and good processability and stability.

The invention relates to the technical field of ceramic metallization, and in particular to a method for preparing a metallized molybdenum-manganese paste. Molybdic acid, polymer microspheres, a surfactant and ammonia water are mixed, the pH value is adjusted to 1 and then the mixture is sealed for hydrothermal reaction. The obtained product is dried and subjected to a primary heat treatment at 350-450°C for 1-3 hours, then heated to 600-800°C for a secondary heat treatment for 5-10 hours, and finally subjected to a tertiary heat treatment at 1000-1100°C for 1-3 hours in a hydrogen atmosphere to obtain micro-nanometer hollow molybdenum powder. An activator, the hollow molybdenum powder and manganese monoxide are mixed and ball-milled, and then mixed with an organic binder to obtain the metallized molybdenum-manganese paste. The metallized layer obtained by the metallized molybdenum-manganese paste has high density and tensile strength.