557 results about "Vitrification" patented technology

The present invention provides a spinel glass-ceramic, a chemically strengthened glass-ceramic and an application thereof. The spinel glass-ceramic comprises a main crystalline phase (Zn, Mg)Al2O4; the average transmittance of the spinel glass-ceramic with a thickness of 0.7 mm in a visible light range is less than or equal to 70.00%; the composition of the spinel glass-ceramic, expressed in molar percentage of oxides, comprises: SiO2 38.00 mol% to 48.30 mol%, Al2O3 25.50 mol% to 30.00 mol%, MgO 5.00 mol% to 8.00 mol%, ZnO 8.00 mol% to 14.00 mol%, ZrO2 3.00 mol% to 5.00 mol%, Na2O 7.20 mol% to 14.00 mol%, K2O 0.00 mol% to 2.00 mol%, B2O3 3.00 mol% to 8.00 mol%, Y2O3 0.00mol%~1.00mol%, BaO0.00mol%~2.10mol%; the composition of the spinel glass-ceramic does not include Li2O. The spinel glass-ceramic provided by the present invention has high intrinsic strength, and can be chemically strengthened to obtain chemically strengthened glass-ceramic with excellent drop impact resistance, which can meet the use requirements of electronic equipment protective glass. The spinel glass-ceramic provided by the present invention does not require the use of expensive lithium, and has better economic benefits compared to the existing lithium-containing spinel glass-ceramic.

The invention provides a glass core plate of an FCBGA packaging substrate and a manufacturing method of the glass core plate, and the manufacturing method of the glass core plate comprises the following steps: providing a glass plate comprising a first surface and a second surface which are oppositely arranged, and defining at least one of the first surface and the second surface as a functional surface of the glass plate; forming a metal seed layer covering the functional surface of the glass plate, and forming a shielding layer on the surface, away from the glass plate, of the metal seed layer; patterning the shielding layer to form a plurality of first openings exposing the metal seed layer in the shielding layer; conductive circuits filling the first openings are formed, and the shielding layer is removed to obtain second openings located between the two adjacent conductive circuits; and removing the metal seed layer at the bottom of the second opening to obtain the glass core plate. According to the FCBGA packaging substrate, the glass plate which is low in thermal expansion coefficient and high in glass transition temperature is adopted as the core plate of the glass core plate in the FCBGA packaging substrate, warping of the substrate is reduced, and the reliability of the substrate and the yield of products are improved.

The invention discloses a preparation method of a high-temperature-resistant high-strength polyimide composite material, and relates to the technical field of polyimide composites.The preparation method comprises the following preparation steps that S1, a customized silane coupling agent is prepared; s2, preparing a bionic dynamic interface modified reinforcing filler, wherein the modified reinforcing filler is synergistically modified through a bionic coating and a customized silane coupling agent; and S3, preparing a polyimide precursor solution containing the dynamic network. According to the preparation method of the high-temperature-resistant high-strength polyimide composite material, through the integrated design of'customized silane coupling agent + bionic dynamic interface modification + dynamic network-containing polyimide precursor + gradient hot-pressing curing ', the glass-transition temperature of the prepared composite material is greater than or equal to 335 DEG C, the tensile strength is greater than or equal to 208 MPa, and meanwhile, the thermal repair efficiency at 180-250 DEG C is greater than or equal to 87%; the technical bottleneck that high temperature resistance, mechanical strength and repairing performance of the material are difficult to consider at the same time in the prior art is solved.

The invention relates to the field of research, development and design of artificial intelligence materials, and provides a polyimide material glass transition temperature prediction method based on machine learning, and the method comprises the steps: collecting experimental data including the structure and glass transition temperature of a polyimide polymer; preprocessing the obtained data, and then dividing a training set and a test set based on the feature data and the label data; constructing a prediction model based on gradient lifting, and continuously adjusting parameters until optimal parameters are found; evaluating the training model by using evaluation parameters such as a decision coefficient and a mean square error, and finally confirming a prediction model; and inputting related parameters to the model based on the trained prediction model, and outputting the glass transition temperature of the corresponding polyimide. By adopting the gradient lifting model, the scientific research cost is reduced, the scientific research efficiency is improved, and a new path is opened up for the development of the high glass transition temperature polymer.

The invention provides an environment-friendly formaldehyde-free negative oxygen ion automobile glass film and a manufacturing method thereof, and belongs to the field of glass films. The finishing paint is prepared from the following raw materials: mixed resin emulsion, rare earth nano cerium oxide, metal nano oxide, glass fiber powder, vitrified micro-beads, nano negative ion powder, a dispersing agent, an ultraviolet light absorber, a wetting agent, a thickening agent, a defoaming agent, a surfactant, a mildew preventive and a flatting agent. The environment-friendly formaldehyde-free negative oxygen ion automobile glass film is prepared through the prepared mixed resin emulsion, under the specific raw material ratio, the ultraviolet absorption rate and the heat insulation effect of the automobile glass film can be effectively improved, the negative oxygen ion release amount of the automobile glass film can be increased, formaldehyde-free and environment-friendly effects of the automobile glass film are achieved, and the service life of the automobile glass film is prolonged. The automobile glass film also has better weather resistance and mechanical strength, and has a wide application prospect when being used on automobile glass.

The present invention provides crystallized glass of three-dimensional shape for easily producing chemically strengthened glass of three-dimensional shape that resists damage and has exceptional transparency. This crystallized glass of three-dimensional shape: contains crystals; has light transmittance in terms of a thickness of 0.8 mm of 80% or higher; and contains 45-74% SiO2, 1-30% Al2O3, 1-25% Li2O, 0-10% Na2O, 0-5% K2O, a total of 0-15% of SnO2 and / or ZrO2, and 0-12% P2O5, these amounts expressing the oxide-based mass percentage.

The invention belongs to the technical field of membrane separation, and provides a ceramic-based oil-water separation membrane as well as a preparation method and application thereof. According to the method, Ti3C2Tx particles are stripped into lamellar Ti3C2Tx, then ZIF-62 is synthesized in the lamellar Ti3C2Tx in situ, the ZIF-62 plays a role in pillared between layers of the Ti3C2Tx, the interlayer spacing of the Ti3C2Tx is stabilized, the Ti3C2Tx is prevented from being excessively expanded in an aqueous solution, and the separation performance is improved; then, the ZIF-62 / Ti < 3 > C < 2 > T < x > is calcined, ZIF-62 crystal particles in the ZIF-62 / Ti < 3 > C < 2 > T < x > are vitrified, and the obtained agZIF-62 enhances the pillared effect of the agZIF-62 on the lamellar Ti < 3 > C < 2 > T < x > and the interlayer spacing stability of the agZIF-62 on the lamellar Ti < 3 > C < 2 > T < x >. And then the agZIF-62 / Ti3C2Tx is modified, so that the surface wettability of the ceramic-based oil-water separation membrane is enhanced, and the oil-water separation performance of the ceramic-based oil-water separation membrane is further improved.

The invention relates to the technical field of material drying, in particular to spray drying equipment. The spray drying equipment comprises a spray drying tower, an atomizer and a heating system, wherein the atomizer is arranged in the center of the top of the spray drying tower; an inlet of the heating system is used for inputting external air, an outlet of the heating system is used for conveying hot air into the spray drying tower, and the temperature of the hot air conveyed by the heating system is in a decreasing trend from the center of the spray drying tower to the tower wall of the spray drying tower. In the drying process of the spray drying equipment, the heating temperature at the center of the spray drying tower is higher than the heating temperature near the tower wall of the spray drying tower, the high heating temperature at the center of the spray drying tower can guarantee the drying degree of materials, and the low heating temperature near the tower wall of the spray drying tower can further dry the materials and also can guarantee the drying degree of the materials. And meanwhile, the temperature of the material cannot reach the glass-transition temperature, so that the aim of inhibiting the hot-melt wall sticking phenomenon is fulfilled.

The invention provides a preparation method of microcrystalline glass, chemically strengthened microcrystalline glass and a microcrystalline glass product, and relates to the technical field of materials, the crystalline phase of the microcrystalline glass comprises petalite, lithium disilicate and lithium silicate, and the crystallinity is less than or equal to 90%; the ratio of the content of petalite to the content of total crystals is 45-60%, the ratio of the content of lithium disilicate to the content of total crystals is 30-45%, the ratio of the content of lithium silicate to the content of total crystals is less than or equal to 13%, and the ratio of the total content of petalite and lithium disilicate to the content of total crystals is greater than or equal to 75%. Through the implementation of the application, the contents and crystal sizes of different crystal phases are controlled at a specific ratio, so that the glass ceramic product can be ensured to have excellent optical performance while having good mechanical strength performance.

The invention belongs to the technical field of inorganic mineral fiber preparation, and provides a high-strength and high-modulus inorganic mineral fiber prepared from water-quenched slag and a preparation method of the high-strength and high-modulus inorganic mineral fiber. Firstly, the chemical purity of raw materials is improved through density separation and acid pickling, meanwhile, Na2CO3 and Fe2O3 are added, the tendency of crystal precipitation is reduced, and the vitrification characteristic of water-quenched slag is improved; secondly, the composite oxide modifier further optimizes the structure of the glass network, and B2O3 enhances the chemical stability of the glass network and reduces the melt viscosity by forming a B-O-Si bond; y2O3 provides high electric field intensity, inhibits crystal precipitation and enhances the crosslinking degree of a network; v2O5 provides a redox buffer function through a variable valence state, so that the chemical environment in the melting process is optimized, and the creep resistance is improved; and finally, a compact Al2O3 coating is formed on the surface of the fiber, so that the mechanical strength, the oxidation resistance, the corrosion resistance and the high-temperature stability of the fiber are improved.

The invention discloses a high-strength hollow glass microsphere and a preparation method thereof. The method comprises the following steps: 1) synthesizing a feed liquid system of the hollow glass microsphere; 2) synthesizing precursor particles; and 3) vitrification sintering: conveying the precursor particles by adopting a low-airflow double-plunger pump, and carrying out vitrification sintering to prepare the hollow glass microspheres. According to the method, a low-airflow double-plunger pump is adopted to replace a Venturi jet pump to convey precursor particles, the product with the strength remarkably improved is prepared, and the strength of the product is improved by at least 7% and can be improved by 13% at most.

The invention belongs to the technical field of organic electroluminescence, and particularly provides an electroluminescent material and an organic electroluminescent device comprising the same, the electroluminescent material comprises a combination of a first organic compound and a second organic compound, the first organic compound has a structure as shown in a formula I, and the second organic compound has a structure as shown in a formula II; the second organic compound has a structure as shown in a formula II; through structural design of the first organic compound and the second organic compound, particularly introduction of a substituent group at a specific site, and synergistic compounding of the two organic compounds, the material has higher glass transition temperature Tg and excellent thermal stability while having excellent photoelectric properties and carrier transport properties. The electroluminescent material is used for the organic electroluminescent device, is especially suitable for a luminescent layer, and can effectively ensure the uniformity of a deposited film, so that the thermal stability of the device is excellent, and the high-temperature test life is remarkably prolonged.

To reduce perspective distortion of a glass molded article obtained by subjecting a glass plate to a bending processing.SOLUTION: The present invention relates to a method for producing a glass molded article, the method including: attaching a flattened mold cloth, which is obtained by reducing irregularities on a surface of a mold cloth, to a forming mold; heating a glass plate to a temperature equal to or higher than a glass transition point; and press-forming the softened glass plate into a predetermined shape along the forming mold via the flattened mold cloth.SELECTED DRAWING: None

The invention relates to the field of glass chemical strengthening, and discloses a molten salt purifying agent and a preparation method and application thereof.The molten salt purifying agent is prepared from, by mass, 35%-65% of SiO2, 5%-40% of Al2O3, 0-5% of MgO, 20%-45% of Na2O and 0.01%-2% of CeO2; wherein the mass ratio of the (MgO + CeO2) to the (SiO2 + Al2O3) is 0.001 to 0.1. According to the molten salt purifying agent provided by the invention, SiO2, Al2O3, MgO, Na2O and CeO2 in a certain proportion are added, the proportion of MgO + CeO2 to SiO2 + Al2O3 is strictly controlled in a specific range, and the effect of each component in purifying molten salt is fully utilized, so that the molten salt purifying agent is high in purification reaction activity and purification efficiency, the phenomena of softening and purification activity failure of the molten salt purifying agent in the molten salt can be avoided, and the service life of the molten salt purifying agent is prolonged. The stability and the service life of the molten salt purifying agent are improved, the proportion of the molten salt is not affected, the situation that alkaline matter is attached to the surface of glass to affect the surface flatness of the glass is avoided, the service life of the molten salt can be prolonged, and the consistency of the glass strengthening performance is improved.

A method of treating a soft or hard capsule shell to reduce or alleviate stress in the capsule shell. The method includes a step of heating at least a portion of the soft or hard capsule shell to a temperature above a glass transition temperature of the capsule shell but below a melt temperature of the capsule shell for a time sufficient to reduce internal stress in the capsule shell. The method can be used to reduce cracking of hard or soft capsule shells by application of the heat treatment to the filled capsule shells after fabrication and filling.

The present invention provides a method of manufacturing a stiffener material comprising: providing an uncompressed felt layer comprising a primary fibrous material having a density of between 0.08 g / cm3 and 0.16 g / cm3; passing the felt layer through a double belt press; wherein as the felt layer is passed through the double belt press it is maintained under constant pressure whilst first being heated to within 20° C. of a melting point of the primary fibrous material and is subsequently cooled to below the glass temperature of the primary fibrous material to form a compressed material. A stiffener material manufactured according to the method of the present invention is also provided.

A hybrid glass manufacturing furnace for supplying a unit for floating the glass on a molten metal bath, includes, from upstream to downstream: an electric melting zone with a cold-top including electrodes for melting a vitrifiable mixture in order to obtain a bath of glass; a refining and homogenizing zone with a hot-top, including a first convection loop and a second convection loop; and a zone for cooling the glass formed by a conditioning tank which, being passed through by the second convection loop, is connected to at least one flow channel, wherein the hybrid furnace includes at least one tank neck that includes a floor and connects the electric melting zone to the refining and homogenizing zone of the glass and the hybrid furnace includes a non-return separation device to prevent the molten glass in the refining and homogenizing zone from returning to the melting zone.

The invention provides glass glaze for a high-gradient ZnO resistor disc as well as a preparation method and application of the glass glaze, and the preparation method comprises the following steps: mixing a spherical spodumene expansion coefficient adjusting material, low-temperature glass powder, polyvinylpyrrolidone and water to obtain slurry; the mass ratio of the spherical spodumene expansion coefficient adjusting material to the low-temperature glass powder is 1: (5-20); and coating the surface of the high-gradient ZnO resistor disc with the slurry, and vitrifying to obtain the glass glaze for the high-gradient ZnO resistor disc. The lead-free low-temperature gradient glass glaze is matched with the ZnO resistor disc, the glaze surface of the resistor disc is free of cracks before and after action, the insulation requirement of the high-gradient ZnO resistor disc can be met, and the capacity tolerance passing rate and the large-current impact tolerance passing rate of the resistor disc are further improved.

A glass is an amorphous oxide glass. An SiO2 content ranges from 56 mol % to 80 mol %, an Li2O content is 2.00 mol % or less, a B2O3 content ranges from 0 mol % to 4 mol %, a total content of MgO and CaO (MgO+CaO) ranges from 9 mol % to 40 mol %, and the oxide glass has a specific gravity of 2.75 g / cm3 or less, and a glass transition temperature of 650° C. or higher.

A method for forming an oxidation protection system on a carbon-carbon composite structure can comprise applying a boron slurry to the carbon-carbon composite structure, wherein the boron slurry comprises a boron compound, a first glass mixture, a first glass former, a first glass modifier, and a first carrier fluid, the first glass mixture including a first glass compound and a second glass compound, the first glass compound having a first viscosity-temperature profile that is at least one order of magnitude below a second viscosity-temperature profile of the second glass compound; applying a silicon slurry to the carbon-carbon composite structure, wherein the silicon slurry comprises a silicon compound, a third glass compound, a second glass former, a second glass modifier, and a second carrier fluid; and heating the carbon-carbon composite structure.

Embodiments of methods for forming strengthened glass articles comprise providing an exchangeable glass substrate having a coefficient of thermal expansion (CTE) between about 60×10-7 / ° C. to about 110×10-7 / ° C., depositing at least one decorative porous inorganic layer onto at least a portion of the surface of the glass substrate, wherein the decorative porous inorganic layer comprises a glass transition temperature (Tg)≥450° C., a glass softening temperature (Ts)≤650° C., wherein the difference in CTE values between the glass substrate and the decorative porous inorganic layer is within 10×10-7 / ° C.; and curing the glass substrate and the deposited decorative porous inorganic layer at a temperature greater than the Ts of the decorative porous inorganic layer; and chemically strengthening the cured glass substrate and the decorative porous inorganic layer thereon via ion exchange at a temperature below the Tg of the decorative porous inorganic layer.

The present invention concerns a furnace for melting vitrifiable materials, comprising (i) a melting tank with heating means configured to melt vitrifiable materials; (ii) a fining tank with heating means configured to refine the melt; (iii) a neck separating the melting tank and the fining tank; (iv) inlet means located at the melting tank to charge the vitrifiable materials; (v) outlet means at the fining tank to flow the refined melt to a working zone; wherein the heating means in the fining tank comprises a plurality of thermal plasma torches configured to emit from a working fluid a plasma flame above the melt.

This application belongs to the field of glass-ceramics technology, specifically relating to a glass-ceramic, a chemically strengthened glass-ceramic, and their applications. The glass-ceramic comprises a primary lithium disilicate crystalline phase and contains various oxides within specific ranges, with the composition, expressed as a molar percentage of each oxide in the glass-ceramic composition, satisfying the following: 2.00 ≤ SiO₂ / Li₂O ≤ 2.40. The glass-ceramic of this application exhibits high intrinsic strength and excellent optical properties, and can be chemically strengthened to produce a chemically strengthened glass-ceramic with high stress levels and excellent deformation resistance.

Glass-based articles comprise stress profiles providing improved drop performance. A glass-based substrate comprises: a glass transition temperature (Tg), a liquid fragility index (m), and fictive temperature (Tf), wherein Tg is less than or equal to 650° C., a value of Tf minus Tg is greater than or equal to −30° C., and m is greater than or equal to 25. A stress relaxation rate is greater than or equal to 10%, or 20% or more. The articles can comprise a lithium-based aluminosilicate composition and a fracture toughness that is greater than or equal to 0.75 MPa*m0.5. The stress profiles comprise: a spike region extending from the first surface to a knee; and a tail region extending from the knee to a center of the glass-based article, the tail region comprising: a negative curvature region wherein a second derivative of stress as a function of depth is negative; a depth of compression (DOC) that is greater than or equal to 0.22 t, and a parabolic region originating at the DOC and extending to the center of the glass-based article.

Sintering methods comprising (a) providing a layer of powder material on a platform; (b) projecting incident light from a source onto a surface area of the layer of powder material, wherein the incident light is projected for a sufficient time to densify the layer of powder material and form a layer of densified material; (c) optionally cooling the layer of densified material to a sufficient temperature to solidify or vitrify the layer of densified material to form a layer of sintered material; and (d) repeating steps (a) to (c) to form a sintered article in a layer-wise fashion are disclosed. The incident light may cause complete melting of the powder material or heat the powder material above its glass transition temperature. In general, the incident light is projected simultaneously and for a time span substantially the same as formation of the layer of densified material.

The invention discloses polyvinyl acetal resin for electronic ceramics and a preparation method of the polyvinyl acetal resin, and belongs to the technical field of high polymer materials. The method comprises the following steps: adding a first part of butyraldehyde and aldehyde A into an aqueous solution of polyvinyl alcohol, uniformly mixing, then adding an acid catalyst, and carrying out primary aldolization reaction to obtain a mixture 1; and adding a second part of butyraldehyde and aldehyde B into the mixture 1, uniformly mixing, carrying out secondary aldolization reaction, and adding an alkali solution to adjust the pH value, thereby obtaining the polyvinyl butyral resin. In a step-by-step aldehyde feeding manner, the reaction degree and the reaction rate are controlled by using an alkyl branched chain or aldehyde A containing a benzene ring branched chain, so that the viscosity of the system is slowly increased; and long-chain aldehyde B is utilized to increase the intermolecular distance and reduce cross-linking, and meanwhile, the glass-transition temperature of PVB can be further reduced, so that the long-chain aldehyde B can interact with a plasticizer and a solvent more easily in the pulping process, the compatibility of the long-chain aldehyde B is improved, and uniform preparation of PVB is realized.

The present application relates to the technical field of glass ceramics, and in particular, to a glass ceramic, a chemically strengthened glass ceramic, and uses thereof. The glass ceramic comprises lithium disilicate as a main crystal phase and has specific content ranges of oxides. On the basis of the content expressed as the molar percentage of each oxide in the composition of the glass ceramic, the composition of the glass ceramic satisfies 2.00≤SiO2 / Li2O≤2.40. The glass ceramic of the present application has high intrinsic strength and excellent optical performance, and can be chemically strengthened to obtain a chemically strengthened glass ceramic with high stress level and excellent deformation resistance.

The invention relates to a forming method of a composite material special-shaped hollow pipe fitting, and belongs to the technical field of pipe fitting preparation. The preparation method comprises the following steps that S1, an SMP material is used for preparing a core mold; s2, prepreg is laid outside the core mold, and the core mold is placed in a vacuum bag to be vacuumized according to the set number of layers of the prepreg; s3, an air bag is placed in the core mold, the whole device is placed in a rigid mold, the air bag is inflated to the set air pressure after mold closing, and then heating and curing are conducted; and S4, after the product with the core mold is separated from the rigid mold, the product is evenly heated to the temperature above the glass transition temperature of the SMP material, the softened core mold is removed, and the product is obtained. After the air bag is placed in the core mold, the shape of the core mold can be supported by means of the air bag, so that the core mold can still keep a fixed outline even if the core mold is heated to the glass-transition temperature or above in the heating and curing process, and product forming is achieved through the core mold and the rigid outer mold together.

The invention discloses low-temperature co-fired ceramic tape casting slurry based on acrylic resin. The low-temperature co-fired ceramic tape casting slurry comprises low-temperature co-fired ceramic raw ceramic powder, a binder, a plasticizer, a solvent and a dispersing agent, the low-temperature co-fired ceramic raw ceramic powder comprises, by mass, 10-20% of a binder, 2-8% of a plasticizer, 50-120% of a solvent and 1-4% of a dispersant, wherein the mass of the low-temperature co-fired ceramic raw ceramic powder is 100%. The binder is one or more thermoplastic acrylic resin, the weight-average molecular weight of the acrylic resin is 100000-500000, and the glass transition temperature of the acrylic resin is 30-80 DEG C; the binder is acrylic resin, the weight-average molecular weight of the binder is 250000-400000, and the glass transition temperature of the binder is 40-60 DEG C; the binder is a plurality of acrylic resins, the low glass transition temperature acrylic resin and the high glass transition temperature acrylic resin are combined, the glass transition temperature of the low glass transition temperature acrylic resin is 30-50 DEG C, and the glass transition temperature of the high glass transition temperature acrylic resin is 50-80 DEG C.

This invention belongs to the field of glass microsphere preparation technology, and provides a release agent for fire polishing of white glass microspheres used in the vitrification of radioactive nuclear waste, and its preparation method. The release agent comprises the following components by mass fraction: 10-70% alumina powder, 20-90% quartz sand, 1-3% cerium oxide powder, and 1-6% white flour. By introducing white flour, the release agent of this invention can both protect the color of the white beads themselves and prevent the formation of twins or triplets during the fire polishing process. It also prevents the introduction of major chemical elements into the surface of the glass beads during the release process, thus increasing the compositional stability of the glass beads.