11results about How to "Reduce high temperature viscosity" patented technology

The invention relates to the technical field of preparation of microcrystalline glass, in particular to lithium metasilicate microcrystalline glass and a preparation method thereof, the lithium metasilicate microcrystalline glass comprises the following components in percentage by mass: 62%-78% of SiO2, 3%-10% of Al2O3, 4%-18% of Li2O, 0-5% of K2O, 0.6%-7.5% of P2O5 and 2%-15% of ZrO2, the value of (SiO2 + Al2O3) / Li2O) is 6-15, the value of Al2O3 / Li2O is 0.7-1.3, and P2O5 + ZrO2 is less than 8%. According to the technical scheme, by designing a proper basic glass material formula, a heat treatment crystallization process system and a chemical strengthening process, the high-strength transparent glass ceramic with lithium metasilicate as a main crystal phase is obtained; the glass has the characteristics of large surface compressive stress, high strength, strong ion exchange capacity, excellent impact resistance, excellent falling resistance and the like, so that the application requirement of the glass as a cover plate on an electronic product is met. The problems that in the prior art, glass ceramics are insufficient in strength and transparency and cannot meet the requirements of electronic device protection glass cover plates are solved.

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 relates to the technical field of optical glass manufacturing, in particular to high-refractive-index glass as well as a preparation method and application thereof. The transition metal is less than 4 ppm by mass, and the transition metal comprises one or more of Fe, Cr, Ni, Cu, Mn, Co and V; the oxide is prepared from the following components in mole percent based on the oxide: 17 mol% to 49 mol% of Bi2O3, 2.7 mol% to 15.7 mol% of Nb2O5, 8.5 mol% to 39 mol% of TeO2, 2 mol% to 19.5 mol% of P2O5, 11.3 mol% to 41 mol% of B2O3, 0 mol% to 1 mol% of TiO2, 0 mol% to 1 mol% of Ta2O5, 0 mol% to 1 mol% of WO3 and 0.5 mol% to 16.5 mol% of ZnO, and Bi2O3 / (TeO2 + TiO2 + WO3 + Nb2O5 + Bi2O3) * 100 is more than or equal to 30 and less than or equal to 75. Tests show that when the thickness of the glass is 10 mm, the refractive index of the glass is 2.09-2.35, and the transmittance of the glass with the wavelength lambda 70 smaller than 450 nm is 82.4%-96.8%. The problems that in the prior art, high-refractive-index glass is low in refractive index and light transmittance and low in performance and cost ratio, and the increasingly-developed visual experience and development requirements of head-mounted displays cannot be met are solved.

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 discloses a multi-element modifier for improving the construction workability of a rubber asphalt mixture. The multi-element modifier comprises the following components in parts by weight: 49-66 parts of a rubber body material, 2-13 parts of a thermoplastic elastomer, 20-40 parts of a plasticizer, 5-13 parts of a viscosity modifier and 1-3 parts of a coupling agent. The preparation method comprises the following steps: (1) putting the rubber body material, the thermoplastic elastomer and the plasticizer into a high-pressure reaction kettle in proportion for reaction to obtain a premix A, (2) proportioning the premix A, the viscosity modifier and the coupling agent in proportion and putting into a closed mixer to obtain a rubber compound B, and (3) shearing, granulating and screening the rubber compound B to obtain the multi-element modifier. The multi-element modifier disclosed by the invention not only can reduce the high-temperature viscosity of a rubber asphalt mixture and reduce the construction temperature, but also can enable an asphalt mixing process to be carried out in a simple and continuous manner, so that the energy consumption is effectively reduced, and the construction quality is stabilized.

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 application belongs to the technical field of alkali-free glass fiber, and particularly relates to a modified low-boron and low-fluorine alkali-free glass fiber composition and a preparation method thereof. The modified low-boron and low-fluorine alkali-free glass fiber composition comprises the following components: SiO2, Al2O3, B2O3, CaO, MgO, Fe2O3, TiO2, F2, R2O, X2O3, Li2O and ZnO, wherein R2O is a mixture of K2O and Na2O, and X2O3 is a mixture of La2O3 and Y2O3. The application provides the modified low-boron and low-fluorine alkali-free glass fiber composition and the preparation method thereof. Through the introduction of rare earth elements and the synergistic effect of Li2O and B2O3 components, the problems of high viscosity, high crystallization risk and narrow temperature window of the existing low-boron and low-fluorine glass fiber are effectively solved while the content of boron and fluorine is greatly reduced, and the elastic modulus, breaking strength and water resistance of the glass fiber are significantly improved.

This invention belongs to the field of asphalt modification technology and discloses a high-performance rubber composite modified asphalt and its preparation method. The high-performance rubber composite modified asphalt is prepared by mixing asphalt and a high-performance rubber composite granular modifier. The high-performance rubber composite granular modifier is obtained by extruding and granulating a novel thermoplastic elastomer, desulfurized rubber powder, and a rubber deodorizer using a multi-stage screw extruder. The novel thermoplastic elastomer is obtained by chemical grafting of a moderately pyrolyzed rubber polymer, a thermoplastic elastomer, and a second free radical scavenger. The desulfurized rubber powder is obtained by high-temperature oxygen-free degradation of a second rubber powder and a third free radical scavenger. Compared with traditional rubber composite modified asphalt, the modified asphalt of this invention exhibits superior high and low temperature performance, heat and oxygen aging resistance, and storage stability. It also has good workability, minimal performance degradation during long-term high-temperature storage, significantly reduced odor emissions, and a more stable and lasting odor-neutralizing effect.

The application discloses high-stickiness modified emulsified asphalt as well as a preparation method and application thereof. The high-stickiness modified emulsified asphalt comprises high-stickiness modified asphalt and a soap solution of the emulsified high-stickiness modified asphalt. The high-stickiness modified asphalt comprises, in terms of mass fractions, 35.0-45.0 parts of base asphalt, 5.0-6.0 parts of SEBS, 5.0-6.0 parts of SBR, 1.0-2.0 parts of maleic anhydride grafted wax, 1.5-2.0 parts of rubber oil and 0.1-0.2 parts of sulfur. The soap solution comprises, in terms of mass fractions, 1.0-1.5 parts of an emulsifier, 1.5-2.5 parts of phosphoric acid and 35.0-45.0 parts of water. The high-stickiness modified emulsified asphalt is prepared by optimizing raw materials and a formula, reduces the high-temperature viscosity of high-stickiness asphalt, solves the emulsification difficulty, and has corresponding improvement in normal-temperature performance and storage stability of the asphalt, thereby improving the performance of the high-stickiness modified emulsified asphalt and products.

The invention provides microcrystalline glass, a preparation method thereof and a glass product. The microcrystalline glass is prepared from the following components in percentage by mass: 54 percent to 68 percent of SiO2, 15 percent to 24.8 percent of Al2O3, 0.5 percent to 4.5 percent of Li2O, 0 to 1 percent of Na2O, 1 percent to 5 percent of MgO, 1 percent to 5 percent of ZnO, 0 to 1 percent of CaO, 0 to 3 percent of BaO, 0.5 percent to 4 percent of TiO2, 1 percent to 5 percent of ZrO2, 0.5 percent to 3 percent of P2O5 and 0.1 percent to 1 percent of La2O3. The components of the microcrystalline glass cooperate with each other in a specific ratio and have a synergistic effect, so that the microcrystalline glass with low thermal expansion coefficient, excellent mechanical properties and relatively high visible light transmittance can be prepared.

The invention provides optical glass, which comprises the following components in percentage by weight: 25 to 35 percent of SiO2; 0 to 8 percent of Al2O3; zrO2: 2 to 10 percent; 35% to 45% of BaO; 3 to 12 percent of TiO2; and 6%-15% of ZnO. Through reasonable component design, the optical glass disclosed by the invention has relatively low high-temperature viscosity and excellent devitrification resistance.