Abstract: Disclosed are optical glass, a glass preform or an optical element made therefrom and an optical instrument. The optical glass is calculated by a mass percentage content relative to a total mass of glass converted by an oxide, and the optical glass includes: B2O3: 5˜25%, La2O3: 25?45%, Gd2O3: 15?35%, Y2O3: 0?10%, Yb2O3: 0˜10%, Nb2O5: 2?15%, SiO2: 0.5˜15%, ZrO2: 1?15%, TiO2: 0.5˜10% and WO3: 0˜10%, a weight ratio of Nb2O5 to TiO2, i.e., Nb2O5/TiO2, is 2.17?8.5, and Ta2O5 is not contained.

Abstract: Disclosed are optical glass, a glass preform or an optical element made therefrom the same and an optical instrument. The optical glass is calculated by a mass percentage content relative to a total mass of glass converted by an oxide, and the optical glass includes: B2O3: 5˜25%, SiO2: 0.5˜15%, ZrO2: 1˜15%, TiO2: 0˜10%, Ta2O5: 0.5˜10%, and La2O3, Gd2O3, Y2O3 and Yb2O3 of which the sum is 50˜75%, and Nb2O5 is not contained, a weight ratio of La2O3 to Gd2O3, i.e., La2O3/Gd2O3, is 1.28˜1.625.

Abstract: An optical glass, wherein components thereof are represented by weight percentage, including: 1-15% of SiO2; 5-20% of B2O3; 25-50% of La2O3; 1-12% of ZrO2; 5-20% of TiO2; 6-35% of RO, and the RO is total content of MgO, CaO, SrO, and BaO. Through rational component design, the optical glass has low density while having desired refractive index and Abbe number, which meets the lightweight application of optical instruments.

Abstract: An optical glass, wherein components thereof are represented by weight percentage, including: 1-12% of SiO2; 3-18% of B2O3; 45-65% of La2O3; 1-13% of Y2O3; 1-13% of ZrO2; 3-18% of Nb2O5; 5-20% of TiO2. Through rational component design, the optical glass has excellent chemical stability while having desired refractive index and Abbe number.

Abstract: Disclosed are an optical glass, a glass preform, an optical element and an optical instrument having the same. The optical glass comprises 5 to 25 wt % of B2O3, 25 to 45 wt % of La2O3, 0 to 10 Wt % of Y2O3, 10 to 35 wt % of Gd2O3, 0.5 to 15 wt % of SiO2, 1 to 15 wt % of ZrO2, 0 to 5 wt % of TiO2, 0 to 7 wt % of WO3, 0 to 15 wt % of Ta2O5, 0 to 10 wt % of ZnO and 0 to 8.5 wt % of Nb2O5; and m(B2O3+SiO2+ZrO2+Nb2O5+TiO2+WO3)/m(La2O3+ZrO2) is not lower than 0.6.

Abstract: The present invention discloses a microcrystalline glass, a microcrystalline glass product, and a manufacturing method therefor. The main crystal phase of the microcrystalline glass comprises lithium silicate and a quartz crystal phase. The haze of the microcrystalline glass of the thickness of 0.55 mm is below 0.6%. The microcrystalline glass comprises the following components in percentage by weight: SiO2: 65-85%; Al2O3: 1-15%; Li2O: 5-15%; ZrO2: 0.1-10%; P2O5: 0.1-10%; K2O: 0-10%; MgO: 0-10%; ZnO: 0-10%. A four-point bending strength of the microcrystalline glass product is more than 600 Mpa.

Abstract: A microcrystalline glass product. The microcrystalline glass product includes the following components in percentage by weight: SiO2: 45-70%; Al2O3: 8-18%; Li2O: 10-25%; ZrO2: 5-15%; P2O5: 2-10%; and Y2O3: greater than 0 but less than or equal to 8%. Through reasonable component design, the microcrystalline glass and the microcrystalline glass product have excellent mechanical and optical properties and are suitable for electronic devices or display devices.

Abstract: A microcrystalline glass and microcrystalline glass product with excellent mechanical properties, microcrystalline glass product, the components of which, expressed in weight percent, contain: SiO2: 65˜80%; Al2O3: below 5%; Li2O: 10˜25%; ZrO2: 5˜15%; P2O5: 1˜8%. Through the reasonable component design, the microcrystalline glass product has excellent mechanical properties.

Abstract: An environment-friendly glass material, including components like SiO2, ZnO, alkali metal oxide and S, but does not contain Cd, wherein when the thickness of the environment-friendly glass material is 3 mm, the cutoff wavelength is above 550 nm, the transmittance at 800-850 nm is above 75%, the transmittance at 850-900 nm is above 80%, the transmittance at 900-1000 nm is above 83%, and the transmittance at 1000-2000 nm is above 85%. Through rational component design, the glass material of the present invention realizes environmental protection, UV and visible light cutoff, and high near-infrared transmittance at the same time.

Abstract: A glass ceramic contains the following components by wt %: 60 to 80% of SiO2; 4 to 20% of Al2O3; 0 to 15% of Li2O; more than 0 but less than or equal to 12% of Na2O; 0 to 5% of K2O; more than 0 but less than or equal to 5% of ZrO2; 0 to 5% of P2O5; and 0 to 10% of TiO2. A crystalline phase contains at least one of R2SiO3, R2Si2O5, R2TiO3, R4Ti5O12, R3PO3, RAlSi2O6, RAlSiO4O10, R2Al2Si2O8, R4Al4Si5O18, quartz and quartz solid solution. With a liquidus temperature below 1,450° C., a thermal conductivity above 2 w/m·k, and a Vickers hardness above 600 kgf/mm2, the glass ceramic is applicable to portable electronic devices and optical devices.

Abstract: A glass material, includes the following components by weight percentage: 50-70% of SiO2; 3-15% of B2O3; 0.5-10% of TiO2; 1-12% of ZnO; 0.5-10% of Al2O3; 5-22% of Na2O+K2O, wherein B2O3/SiO2 is 0.06-0.26, and (TiO2+ZnO)/Al2O3 is 0.5-8.0. Through rational component design, the glass material features high light transmittance and excellent chemical stability, so as to be able to be applied in the field of photosensitive device packaging.

Abstract: The present invention provides a microcrystalline glass and microcrystalline glass product with excellent mechanical properties, microcrystalline glass product, the components of which, expressed in weight percent, contain: SiO2: 65 ?80%; AI2O3: below 5%; Li2O: 10 ?25%; ZrO2: 5 ?15%; P2O5: 1 ?8%. Through the reasonable component design, the microcrystalline glass product obtained by the present invention have excellent mechanical properties.

Abstract: The present invention provides a microcrystalline glass product. The microcrystalline glass product includes the following components in percentage by weight: SiO2: 45-70%; Al2O3: 8-18%; Li2O: 10-25%; ZrO2: 5-15%; P2O5: 2-10%; and Y2O3: greater than 0 but less than or equal to 8%. Through reasonable component design, the microcrystalline glass and the microcrystalline glass product obtained in the present invention have excellent mechanical and optical properties and are suitable for electronic devices or display devices.

Abstract: A glass composition with high Young's modulus and specific modulus, wherein the glass composition includes the following components by weight percentage: 30-46% of SiO2, 0-6% of B2O3, 10-30% of Al2O3, 4-20% of CaO, 2-15% of MgO, and 13-32% of Y2O3. The glass composition uses common chemical raw materials. By reasonably arranging the contents of each component, the glass is good in heat resistance, chemical stability and press-molding devitrification resistance performance, low in high-temperature viscosity, convenient in bubble elimination, with specific modulus above 34 and Young's modulus above 100 GPa, and is suitable for hard disk substrate manufacturing, semiconductor sealing and other fields.

Abstract: A glass composition with high Young's modulus and low density. The glass composition includes the following components by mole percentage: 52-70% of SiO2, 5-10% of B2O3, 5-15% of Al2O3, 8-20% of CaO and 5-18% of MgO. The glass composition uses common chemical raw materials. By reasonably designing the contents of each component, the glass composition has high Young's modulus, low density, good heat resistance and chemical stability, relatively low high-temperature viscosity, and low raw material cost. The glass composition is easy to eliminate stripes and bubbles during manufacturing, and is suitable for hard disk substrate manufacturing other fields that need high Young's modulus materials.

Abstract: A glass with high thermal expansion coefficient and excellent thermal shock resistance, wherein the glass includes the following components by mole percentage: 55-80% of SiO2; 0-10% of B2O3; 0-10% of Al2O3; 2-20% of ZnO; 0-15% of MgO; and no more than 30% of Li2O+Na2O+K2O. Through the reasonable proportioning of components, the glass has high thermal expansion coefficient and excellent thermal shock resistance at the same time. The glass is suitable for chemical strengthening, and the glass product obtained after chemical strengthening has large surface stress and large depth of stress layer.

Abstract: The present invention discloses a microcrystalline glass, a microcrystalline glass product, and a manufacturing method therefor. The main crystal phase of the microcrystalline glass comprises lithium silicate and a quartz crystal phase. The haze of the microcrystalline glass of the thickness of 0.55 mm is below 0.6%. The microcrystalline glass comprises the following components in percentage by weight: SiO2: 65-85%; Al2O3: 1-15%; Li2O: 5-15%; ZrO2: 0.1-10%; P2O5: 0.1-10%; K2O: 0-10%; MgO: 0-10%; ZnO: 0-10%. A four-point bending strength of the microcrystalline glass product is more than 600 Mpa.

Abstract: A glass composition with high Young's modulus and low density. The glass composition includes the following components by mole percentage: 52-70% of SiO2, 5-10% of B2O3, 5-15% of Al2O3, 8-20% of CaO and 5-18% of MgO. The glass composition uses common chemical raw materials. By reasonably designing the contents of each component, the glass composition has high Young's modulus, low density, good heat resistance and chemical stability, relatively low high-temperature viscosity, and low raw material cost. The glass composition is easy to eliminate stripes and bubbles during manufacturing, and is suitable for hard disk substrate manufacturing other fields that need high Young's modulus materials.

Abstract: A glass composition with high Young's modulus and specific modulus, wherein the glass composition includes the following components by weight percentage: 30-46% of SiO2, 0-6% of B2O3, 10-30% of Al2O3, 4-20% of CaO, 2-15% of MgO, and 13-32% of Y2O3. The glass composition uses common chemical raw materials. By reasonably arranging the contents of each component, the glass is good in heat resistance, chemical stability and press-molding devitrification resistance performance, low in high-temperature viscosity, convenient in bubble elimination, with specific modulus above 34 and Young's modulus above 100 GPa, and is suitable for hard disk substrate manufacturing, semiconductor sealing and other fields.

Abstract: The present invention discloses a glass-ceramic article and a glass-ceramic for an electric device cover plate, the glass-ceramic comprises, as a predominant crystalline phase, lithium silicate and the quartz crystalline phase, and has a composition expressed in weight percent including: SiO2: 65-85%, Al2O3: 1-15%, Li2O: 5-15%, ZrO2: 0.1-10%, P2O5: 0.1-10%, K2O: 0-10%, MgO: 0-10%, ZnO: 0-10%, and Na2O: 0-5%, wherein (SiO2+Al2O3+Li2O+ZrO2)/P2O5 is 40-90, the falling ball test height is 700 mm or more. By reasonable component design, the present invention achieves excellent mechanical properties of the glass-ceramic and the glass-ceramic article of the present invention and obtains the glass-ceramic or the glass-ceramic article suitable for electronic devices at a lower cost.