84results about How to "Good anti-devitrification performance" patented technology

The invention provides a method for producing glass beads used for curing high-level nuclear wastes. The method comprises the following steps of: uniformly mixing raw materials, melting the raw materials into glass solution by using an all-electric glass melting furnace at the temperature of between 1,300 and 14,000 DEG C, clarifying and homogenizing the glass solution for 5 to 8 hours, cooling the glass solution to obtain glass block green bodies, and preparing glass blocks by specifications of finished products from the obtained glass block green bodies; uniformly mixing each 100 parts of the obtained glass blocks with 10 to 25 parts of charcoal powder and 1 to 3 parts of carbon black, and throwing a mixture into a glass bead electrothermal rotary furnace, of which the running speed is 20 to 30 revolution per minute, at a speed of 0.7 to 1.0 kilogram per minute at the temperature of between 850 and 940 DEG C through the glass bead electrothermal revolving furnace, and rolling the mixture to form a ball-shaped mixture; and finally annealing and cooling the ball-shaped mixture to obtain the glass beads used for curing the nuclear wastes. The glass beads used for curing the high-level nuclear wastes produced by the method has ideal high-temperature viscosity, high mechanical strength and high anti-crystallization performance.

The invention relates to optical glass, a prefabticated member thereof, an optical element and an optical instrument, and provides the optical glass which is prepared from the following components inpercentage by weight: 0 to 10% of SiO2, 5 to 25% of B2O3, 0 to 15% of ZrO2, 10 to 25% of ZnO, 2 to 30% of TiO2 plus Nb2O5 plus WO3 and 30 to 55% of Ln2O3. The content of the Ln2O3 is total content ofLa2O3, Gd2O3, Y2O3 and Yb2O3, wherein a ratio of B2O3 to Ln20O3 is 0.3 to 0.8, and a ratio of Y2O3 to Gd2O3 is 0.3 to 3. The optical glass has a refractive index (nd) of 1.84 to 1.87 and an abbe number (vd) of 38 to 41, and meanwhile, is excellent in devitrification resistance and crystallization resistance and high in chemical stability.

The invention provides an optical glass, which comprises, by weight, 0-20% of SiO2, 10-30% of B2O3, 20-50% of La2O3, 0-15% of Gd2O3, 0-15% of Y2O3, 12-30% of ZnO, 4-20% of WO3, 0-15% of Nb2O5, and 0-10% of ZrO2, wherein WO3/ZnO is 0.15-1.5. According to the present invention, through the reasonable component design, the obtained optical glass has a large positive refractive index temperature coefficient and excellent anti-crystallization property in the case of the obtaining of desired refractive index, desired Abbe number and other desired optical performances.

The invention provides optical glass. The optical glass comprises the following components in percentage by weight: 25-45% of SiO2; 2-15% of ZrO2; 35-60% of Nb2O5; 1-10% of Li2O; 2-15% of Na2O; and 0-10% of k2O. According to the optical glass of the invention, the optical glass has excellent crystallization resistance by containing a proper amount of SiO2, alkali metal oxide and other components;the optical glass with high refractive index and high dispersion is obtained by containing Nb2O5, ZrO2 and other oxide components with high refractive index; through reasonable component design, the optical glass has low relative partial dispersion.

The invention discloses glass used for absorbing an optical spectrum with the wavelength being 430-900nm for an optical fiber panel. The glass is prepared by the following raw materials in parts by weight: 200-300 parts of boric acid, 590-700 parts of quartz sand, 50-150 parts of aluminum oxide, 20-100 parts of sodium carbonate, 80-180 parts of potassium carbonate, 140-210 parts of calcium carbonate, 30-40 parts of zinc oxide, 10-30 parts of titanium dioxide, 50-100 parts of iron trioxide, 10-20 parts of cobalt sesquioxide, 5-10 parts of nickel peroxide, 10-15 parts of manganese dioxide and 5-10 parts of cerium dioxide. The glass used for absorbing the optical spectrum with the wavelength being 430-900nm for the optical fiber panel is obtained. At the thickness being 0.40 plus or minus 0.01mm, the optical spectrum penetration ratio of the glass is smaller than or equal to 5%. The melting glass does not contain stones, and the glossiness of the glass is high. The softening temperature is controlled to be 600 DEG C-700 DEG C, the temperature of 820 DEG C is kept for 2h, the devitrification cannot be generated, the devitrification resistance is good, and the chemical stability is good.

The invention provides optical glass with excellent anti-devitrification performance, chemical stability and hardness. The optimal glass is prepared from the following ingredients in a cationic mole percent: 30-50% of P<5+>, 5-25% of Al<3+>, 15-30% of Ba<2+>, 0-20% of Sr<2+>, 0-10% of Gd<3+>, 0-10% of Y<3+> and 0-10% of La<3+>, wherein (Gd<3+>+ La<3+>)/Ln<3+> is equal to 0.1-0.8; anions contain F<->and O<2->, wherein the molar ratio F<->/(F<->+O<2->) of the content of F<-> to the total amount of F<->and O<2-> is equal to 0.3-0.5. According to the optical glass, a ratio of all components is reasonably regulated, so that the fluorophosphates optical glass has excellent anti-devitrification performance, chemical stability and hardness while the fluorophosphate optical glass has the refractiveindex of 1.54-1.61 and the Abbe number of 69-76.

A Tm3+/Yb3+ codoped oxyfluorotellurate glass with high up-conversion power to strong blue light is prepared by fusion method. It contains TeO2, B2O3, PbF2, WO3, ZnF2, Tm2O3 and Yb2O3 proportionally. Its advantages are high transparency, excellent physical and chemical properties, and strong blue light converting power.

The invention provides visible light absorbing glass which comprises the following elements in mole percent: 0-10% of a manganese element, 0-5% of a chromium element; 0-3% of a nickel element, 0-3% ofa cobalt element, 0-3% of a vanadium element and 0-0.5% of a molybdenum element, wherein the sum of the mole percentages of the manganese, chromium, cobalt and vanadium elements is more than or equalto 5%. The invention also provides a preparation method and application of the visible light absorbing glass. The visible light absorption glass prepared by the method of the invention has higher light absorption effect in the range of 300-700 nm; and the transmittance of the visible light absorbing glass is less than or equal to 0.5% under the thickness of 0.20 mm. At the same time, the visiblelight absorbing glass is easy to melt and form, has no internal defects such as bubbles, caking, stripes and the like, has good devitrification resistance, moisture resistance and composition stability, and meets the preparation process requirements of optical fiber imaging elements in thermal performance.

The invention provides an ultrahigh-refractive-index flint glass belonging to a borosilicate system. The ultrahigh-refractive-index flint glass is composed of, by weight percentage, 10-25% of SiO2+B2O3, 15-50% of TiO2+ZrO2+Al2O3+ZnO, 25-60% of TiO2+Nb2O5+WO3 and 14-35% of BaO+SrO+CaO+MgO. Through reasonable composition, under a refractive index of 1.92-2.00 and an abbe number of 20-30, the ultrahigh-refractive-index flint glass achieves excellent transmittance and good devitrification resistance and facilitates production and secondary compression.

The invention provides optical glass which is excellent in interior quality and has excellent transmittance and anti-devitrification property. The optical glass comprises the components in percentages by weight: positive ion: 8-25% of P<5+>, 5-20% of Al<3+>, 20-50% of Ba<2+>, 15-40% of Sr<2+>, 0.5-8% of Mg<2+>, 1-10% of Ca<2+>, 0-10% of La<3+>, 0-10% of Gd<3+> and 0-10% of Y<3+>; negative ions: 40-90% of F<-> and 10-60% of O<2->. Through a reasonable formula design, the optical glass has the excellent interior equality, transmittance and anti-devitrification property while has the refractive index of 1.48-1.58 and the abbe number of 75-83.

The invention discloses a composition and preparation method of scintillation glass used for preparation of a scintillation fiber-optic faceplate. The composition comprises, by weight, 10 to 20% of SiO2, 0 to 10% of Al2O3, 20 to 45% of B2O3, 30 to 60% of La2O3, 0 to 2% of Nb2O5, 5 to 25% of Gd2O3, 0 to 4% of Lu2O3, 0 to 5% of BaO, 0 to 2% of SnO and 0 to 5% of ZnO. The invention also provides the preparation method for the scintillation glass used for preparation of the scintillation fiber-optic faceplate. The method comprises the following steps: (1) weighing the raw materials according to the above-mentioned weight percentages, mixing all the raw materials, and grinding the raw materials until the raw materials are uniform so as to obtain a batch; (2) pouring the batch into a crucible and fusing the batch so as to prepare a glass melt; (3) casting the glass melt on a preheated heat-resistant steel die, maintaining the temperature of the die in a muffle furnace and then carrying out cooling and annealing; and (4) carrying out cutting, surface grinding and polishing so as to obtain the scintillation glass. The prepared scintillation glass has the advantages of good chemical stability, high scintillation light luminescence efficiency and capacity of realizing fiber drawing.

The invention relates to a high-refractive index and low-dispersion heavy lanthanum flint optical glass which is prepared from the following components in percentage by mass of oxides: 9.25-13.37 percent of B2O3, 5.48-7.34 percent of SiO2, 43.60-51.63 percent of La2O3, 3.53-9.12 percent of Y2O3, 4.18-10.23 percent of Gd2O3, 3.47-6.52 percent of Nb2O5, 3.47-6.62 percent of ZrO2, 0.81-1.50 percent of WO3, 3.96-6.95 percent of TiO2, 3.28-6.79 percent of ZnO and 0.61-1.52 percent of Al2O3; and in the composition, the following conditions are also met: B/Si is larger than 1.33 and smaller than 2.54 (by mass percentage), a sum of the mass percentages of La2O3, Y2O3 and Gd2O3 is 58.61-60.32 percent, and a sum of the mass percentages of WO3 and TiO2 is 4.85-8.34 percent. The optical glass does not contain Ta2O3 with high cost to facilitate reduction of the cost of the glass, does not contain alkali metals, alkaline-earth metals and toxic components including Pb, As and Cd either, has the refractive index nd being 1.883-1.915 and an abbe number vd being 35.65-38.32, is excellent in crystallization resistance and is suitable for batch production.

The invention provides optical glass with a refractive index of 1.75-1.82 and an Abbe number greater than 46-53. The optical glass comprises the following components in percentage by weight: 10-30% ofB2O3, 5-18% of SiO2, 30-50% of La2O3, 10-25% of Gd2O3 and 3-15% of Y2O3, wherein the ratio of the Gd2O3 to the sum of the La2O3, the Gd2O3 and the Y2O3 is in a range of 0.15-0.4. Through the reasonable component ratio, the high-refraction low-dispersion optical glass disclosed by the invention has relatively high hardness and excellent anti-crystallization performance, and is suitable for the fields of vehicle mounting, monitoring and the like.

The invention provides optical glass which has reduced or no tantalum, low cost and good bubbles and stripes and is easy to be stably produced. The optical glass comprises 10-30% by weight of SiO2, 20-45% by weight of B2O3, 10-35% by weight of La2O3, 12-30% by weight of BaO, 0-10% by weight of ZrO2, and 0-10% by weight of ZnO. Through reasonable refractive index design, the refractive index of theoptical glass is 1.62-1.70, and the Abbe number is 55-62. The optical glass has low cost, good chemical stability, excellent anti-crystallization property and good transmittance. At the same time, the bubbles and stripes of the glass are good, and the optical glass is easy to be stably produced, and can be widely applied to digital cameras, digital video cameras, camera cell phones and the like.

The invention provides a low refractive index high concentration Er doped fluorine phosphate glass and its preparing method, wherein the compositions (by weigh percent) of the glass include, AlF3 30-35%, alkaline earth fluoride RF2 38-46%, YF3 9-11%, KF 0-6%, ErF3 6%, alkaline earth dihydric phosphate R (H2PO4) 2-5%, MgHPO4 3H2O 0-2%, Al(PO#-[3])#-[3] 0-2%. The conventional fusion method is employed to prepare a series of glass based on the composition and technological requirements.

The invention provides glass. The glass comprises the following components, in percentages by mole: 38-65% of P2O5, 2-15% of Al2O3, 8-25% of CuO, 5-40% of Rn2O, 1-30% of RO, and 0-3% of V2O5, wherein a ratio of the Li2O to the Rn2O is 0.4 to 1.0, a ratio of (the Li2O+the CuO) to the P2O5 is 0.3 to 1.2, a content of the Rn2O is a total content of Li2O, Na2O and K2O, and a content of the RO is a total content of MgO, CaO, SrO and BaO. According to the glass provided by the invention, through reasonable component design, the glass obtained by the invention has excellent anti-crystallization property in the case of having a high Cu content; and at the same time, the glass is suitable for chemical strengthening, and a glass product obtained by chemical strengthening has excellent bending strength.

The invention discloses the composition of an acid-dissolved glass for flexible optical fiber image-transmission bundle, which is characteristic in: (1) well acid dissolved feature; (2) well chemical reliability in air; (3) well resistance to separate crystal for good technical match; (4) without impregnation phenomenon with the material glass.

The invention discloses an optical fiber skin layer glass for an optical fiber image transmission element and a mechanical pipe-drawing forming method of the optical fiber skin layer glass. The optical fiber skin layer glass composition for the optical fiber image transmission element comprises the following components in percentage by mole: 72.0-80.0% of SiO2, 5.5-7.0% of Al2O3, 2.0-8.0% of B2O3,3.0-8.0% of Na2O, 2.0-7.0% of K2O, 1.0-3.0% of CaO, 0.1-2.0% of SrO, 0.1-2.0% of ZnO, 0.1-0.9% of ZrO2, 0.1-0.9% of TiO2 and 0.1-0.2% of Sb2O3. The preparation method by the mechanical pipe-drawing forming comprises the following steps: melting glass; carrying out clarifying and homogenizing; carrying out pipe-drawing forming; and carrying out cutting and annealing. The disclosed skin material for the optical fiber image transmission element is excellent in chemical property, stable in glass composition, low in refractive index and excellent in anti-crystallization property.

Provided is a formula for light environment-friendly alkali-free boron-alumina silicate glass used in a liquid crystal display (LCD). SnO in the formula can be obtained easily, is nontoxic and can eliminate bulbs in alkali-free glass when being separately used as a glass clarifying agent. Melting temperature of ZnO can be reduced so that liquidus temperature can be reduced, and excellent crystallization-resisting properties can be achieved. Basic physical properties of the liquid crystal substrate prepared through the formula can stably reach that: coefficient of thermal expansion is lower than 35*10-7/DEG C, temperature of strain point is higher than 670 DEG C, density is lower than 2.41g/cm<3>, liquidus temperature is lower than 1100 DEG C, liquidus viscosity is larger than 250,000 poises, and bulbs with diameter larger than 0.1mm in per kilogram of glass are invisible.

The present invention discloses a high refractive index middle-expansion core material glass for a middle-expansion optical fiber image inverter. The high refractive index middle-expansion core material glass comprises the following raw materials: boric acid, quartz sand, aluminum hydroxide, calcium carbonate, zinc oxide, titanium dioxide, barium carbonate, barium nitrate, zirconium oxide, lanthanum oxide, niobium oxide, yttrium oxide and lead oxide. The preparation method for the high refractive index middle-expansion core material glass comprises: 1) adding raw materials to a platinum crucible; 2) after raw material addition is completed, heating to achieve a clarification temperature so as to clarify; 3) after completing clarification, cooling to achieve a pouring temperature, and carrying out pouring molding to obtain a glass rod; and 4) carrying out demolding on the molded glass rod, annealing, carrying out thermal insulation, cooling, and discharging from the furnace at a room temperature. According to the present invention, the formula system can be used for the core material glass of the middle-expansion optical fiber image inverter, wherein the refractive index of the glass is more than 1.80, the expansion coefficient is (68+/-5)*10<-7>/DEG C, the glass transmittance is high, the softening temperature is 650-750 DEG C, crystallization is not generated after thermal insulation for 2 h at a temperature of 850 DEG C, and the chemical stability is good.

The invention provides fluorophosphate optical glass, an optical preform, an element and an instrument, which belong to the technical field of optical glass. The optical glass comprises the followingcomponents: in terms of the molar percentage of cations, 2-20% of P<5+>, 20-40% of Al<3+>, 0.5-10% of Ba<2+>, 5-25% of Sr<2+>, 15-35% of Ca<2+> and 1-15% of Mg<2+>, and in terms of the molar percentage of anions, 83-95% of F<-> and 5-17% of O<2->. The fluorophosphate optical glass has a refractive index (nd) of 1.42-1.45, an Abbe number (vd) of 93-96, a density (rho) of 3.55 g/cm<3> or less, a bubble degree of B grade or more, a thermal expansion coefficient of 160*10<-7>/K or less, a water resistance stability (Dw) of grade 2 or more, and excellent crystallization resistance.

The invention provides optical glass. Cation components of the optical glass include, by mole, 35-55% of Si<4+>, 1-15% of Ti<4+>, 10-30% of Zn<2+>, 0-10% of Zr<4+>, 1-15% of Ba<2+>, 8-22% of Na<+> and0-12% of K<+>, wherein the ratio of the Ti<4+> to the Si<4+> is 0.02-0.4. Through the reasonable component design, while the desired refractive index, Abbe number and other optical properties are obtained, the optical glass has excellent anti-crystallization performance.