395 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 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 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 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 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.

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 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.

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 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.

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.

The present invention provides a prediction method based on the glass transition temperature of fluororubber, which relates to the technical field of material parameter measurement. The method includes: obtaining the data of the fluororubber to be measured; inputting the data of the fluororubber to be measured into the final glass transition temperature prediction model to obtain the prediction result of the transition temperature. The present invention solves the problems of too high cost of measuring Tg in the prior art and limited methods for directly predicting the material Tg by using basic formulation and process parameters, with low prediction accuracy.

Provided is a bonding material for heat dissipation substrates that enables the manufacture of high-performance heat dissipation substrates through low-temperature, short-time heat treatment. In the heat dissipation substrate 1, the bonding material for the heat dissipation substrate is a thermoplastic resin having a glass transition point of 200°C or more and 300°C or less, and D 50 and a thermally conductive material including at least first particles having a particle diameter of 2 μm or more and 5 μm or less and an average aspect ratio of 1.2 or more. In this bonding material, when the total mass of the thermally conductive material is taken as 100 wt%, the content of the first particles is 70 wt% or more and 100 wt% or less. With this bonding material, a bonding layer 40 with excellent bonding strength, heat resistance, and thermal conductivity can be formed at the interface between the circuit member 20 and the ceramic member 10 and at the interface between the heat dissipation member 30 and the ceramic member 10 by low-temperature, short-time heat treatment.

The invention relates to the technical field of solid waste harmless and recycling equipment, in particular to a gradient temperature pyrolysis-melting vitrification integrated treatment device and process for red mud. According to the device, an electromagnetic heating rotary kiln pyrolysis section and an electrode melting section are directly coupled with a material transfer device through high-temperature atmosphere isolation. The process comprises the following steps: granulating red mud, a reducing agent and a flux, feeding into a rotary kiln of which the temperature is accurately controlled by multiple groups of electromagnetic induction coils in a partitioned manner, and sequentially completing dehydration, selective reduction and iron particle polymerization to produce gt; high-temperature pyrolysis slag at 1000 DEG C; the pyrolysis slag directly falls into an electric melting pool to complete melting and iron-slag liquid phase separation under absolute isolation of reducing atmosphere and oxidizing atmosphere by the device, and pig iron and a stable glass body are respectively obtained. Through the design of'hot slag direct melting 'and'energy closed loop', the problems of high energy consumption and complex flow of the traditional process are solved, and efficient recovery of iron resources in the red mud and thorough harmless and high-valued utilization of the residues are realized.

The present invention relates to a method for searching for a structural gene of glass, including the following steps: determining atomic species for structure search according to the glass system; screening structure on the basis of the first principle to screen out compounds that can be formed by the interaction among each of the atoms; comparing the formation energy and the phonon spectrum of each compound to obtain stable compounds; and constructing a metastable composition diagram of a glass system according to the stable compounds, in metastable composition diagram, a micro-structural unit of a glassy compound near a target glass composition point is the structural gene of glass in the metastable glass composition diagram; designing glass properties based on the characteristics of the structural genes; and realizing the design of high-performance glasses through a hot-melt method.

The invention discloses a preparation method of a flow-state gold tailing cementing filler. The flow-state gold tailing cementing filler comprises the following raw materials in parts by weight: 40-90% of gold tailings, 1-30% of mineral powder, 1-20% of carbide slag, 1-20% of water glass, 0.1-1% of a chemical additive and 20-40% of water. Solid wastes such as gold tailings, carbide slag and mineral powder are used as raw materials, a polycarboxylic acid high-molecular compound is used as a reinforcing auxiliary agent, and a small amount of water glass is used as an alkali activator to excite the activity of the raw materials such as the gold tailings.

This invention relates to a glass cover with an outer frame, wherein a flat glass plate is directly joined to the outer frame, wherein the glass matrix within the outer frame comprises at least one of bismuth oxide and boron oxide, and the glass ceramic has a coefficient of thermal expansion of 15 × 10⁻⁶. －7 In the glass ceramics described above, the total volume fraction of the negative thermal expansion filler and the total volume fraction of the filler components are both 40% to 65%, and the softening point of the glass components in the glass matrix is ​​lower than the glass transition point of the flat glass.

A method for producing a flat thin glass ribbon is provided. The method includes the steps of drawing melted glass downward away from a tank in a pulling direction while applying tensile forces which act in the pulling direction to form the thin glass ribbon having a thickness of at most 250 μm and cooling the thin glass ribbon until a temperature of the thin glass ribbon undershoots a glass transition temperature. The tensile forces are transferred to the thin glass ribbon by at least two pairs of drawing rollers. The at least two pairs of drawing rollers are spaced apart transversely to the pulling direction and contact the thin glass ribbon on longitudinal edges of the thin glass ribbon. The thin glass ribbon only makes contact with the at least two pairs of drawing rollers at a position where the temperature of the thin glass ribbon is at most at or below 500° C.

The application belongs to the technical field of metal-organic framework material and gas separation membrane preparation, and particularly relates to a preparation method of a halogen-modified high-porosity self-supporting MOF glass membrane, which comprises the following steps: firstly, a high-porosity vitrifiable MOF material with imidazole as a first ligand and a series of halogen benzimidazoles as second ligands is synthesized by a low-temperature solvothermal method; then, halogen MOF powder with high-temperature melting characteristics is pressed into a dense and crack-free disc-shaped precursor by a mechanical cold-pressing method; and finally, the disc-shaped precursor is subjected to high-temperature melting heat treatment under an inert atmosphere, and the heating temperature can ensure that the MOF particles are fully melted and flow, so that the interstitial gaps, defects and grain boundaries among the original particles in the thin sheet are completely eliminated. The application aims to prepare a defect-free, high-selectivity and high-flux MOF glass membrane, and solves the problems of low porosity and limited gas separation performance of the existing MOF glass membrane.

Method for producing a film composite (11) from several material webs (14, 15, 16, 17, 18) for a valuable or security document, wherein each material web (14, 15, 16, 17, 18) is transported along at least one transport roller (21, 22, 23, 24, 25) and fed to at least one lamination device (34), wherein each surface of the material web (14, 15, 16, 17, 18) that is laminated with an adjacent material web (14, 15, 16, 17, 18) is preheated with at least one heating element (29, 30, 31, 32) after leaving the last transport roller (21, 22, 23, 24, 25) and before entering the lamination device (34), and between two In each of the adjacent material webs (14,15; 15,16; 16,17; 17,18) at least one heating element (29, 30, 31, 32) is positioned, through which the surfaces of the adjacent material webs (14,15; 15,16; 16,17; 18) to be laminated are heated.17, 18) are preheated,- wherein the preheated material webs (14, 15, 16, 17, 18) are brought together with a pair of rollers (26) and then fed to the lamination device (34) and laminated together to form the film composite (11), characterized in that two or more material webs (14, 15, 16, 17, 18) are made of a thermoplastic elastomer, and that the respective heating element (29, 30, 31, 32) is controlled with a heating power such that the surface of these material webs (14, 15, 16, 17, 18) is preheated to a temperature that corresponds to or is higher than the glass transition temperature of the respective material web (14, 15, 16, 17, 18).

The application discloses a method for calculating the thermal conductivity of MXene-PI based on molecular dynamics, and belongs to the technical field of thermal conductivity simulation calculation. The method firstly optimizes PI molecular chains, and constructs a PI model based on the molecular chains to carry out relaxation calculation to obtain the lowest energy configuration; then the lowest energy configuration is sequentially subjected to structure optimization, annealing, isothermal-isobaric ensemble and canonical ensemble to obtain a globally optimal PI model; the glass transition temperature of the PI model is predicted to obtain a density-temperature change curve, and then the glass transition temperature of the PI model is obtained to determine whether the model is reasonable; then the initial unit cell of the MXene material is subjected to structure relaxation, and the simulation parameters are optimized, and the surface of the stable unit cell is subjected to functional group modification to obtain a single-layer structure model of the MXene; finally, a MXene-PI composite material model is assembled; heat transfer analysis is carried out on the composite material model by using a non-equilibrium state molecular dynamics method to realize thermal conductivity calculation. The method has clear prediction and guidance value.

A method for melting vitrifiable materials to produce flat glass, including: providing a furnace including: a melting tank, a fining tank, a neck, at least one inlet means located at the melting tank, an outlet means located downstream of the fining tank, and at least one extraction means of a flue gas located at the at least one upstream zone; charging the vitrifiable materials including raw materials and cullet in the melting tank with the at least one inlet means; cullet pre-heating; melting the vitrifiable materials in the melting tank; fining the melt in the fining tank; flowing the melt from the fining tank to a working zone through the outlet means; and capturing CO2 from the flue gas.

The invention provides a metal glass re-toughening method, and relates to the technical field of amorphous alloy mechanical property improvement, and the metal glass re-toughening method comprises the following steps: carrying out current treatment on relaxation-state metal glass, heating the relaxation-state metal glass to a first set temperature, and then carrying out quenching treatment; wherein the first set temperature is lower than the glass transition temperature Tg of the metal glass. It needs to be explained that the relaxation state (aging state) metal glass is subjected to energizing treatment, so that the relaxation state (aging state) metal glass is rapidly heated to a higher temperature, at the moment, the memory effect can be activated, the free volume content in the metal glass is increased to a certain extent, and the energy state of the metal glass is improved; subsequently, rapid cooling by quenching is performed such that the increased free volume is retained, achieving rejuvenation of the metallic glass after aging.

The invention discloses a preparation method and application of an ultra-thin glass through hole TGV, and belongs to the technical field of three-dimensional integration, MEMS devices and advanced packaging. According to the technical scheme, the front face of the silicon wafer is etched to form a high-density blind hole template, then oxidation is carried out for a long time in a wet oxygen environment, silicon around the blind holes is converted into thermal growth SiO2 in situ, then copper columns are prepared in the blind holes to form a copper / SiO2 coplanar bonding level interface, mixed bonding with Cu-Cu + SiO2-SiO2 of a butt-joint wafer is achieved, silicon is removed from the back face till copper is exposed, and finally the high-density blind hole silicon wafer is obtained. And forming the ultra-thin TGV through structure. Different from the route that holes are firstly formed in glass in the prior art, the method does not directly process ultra-thin glass, blind holes and vitrification are completed on silicon, and then metallization and bonding are performed, so that coplanarity / roughness and mass production consistency required by an ultra-thin TGV are obtained on a 8-12-inch silicon platform.

The glass article includes an interlayer disposed between the second major surface of the first glass substrate and the third major surface of the second glass substrate. The glass article includes a porous interlayer including a plurality of pores and adhered to the second major surface or the third major surface. A polymeric material is disposed in the plurality of pores. In aspects, the first glass transition temperature of the interlayer is about 10 DEG C or higher than the second glass transition temperature of the polymeric material. In aspects, the maximum [Delta] E value is about 2.0 or less. In one embodiment, a method includes filling a plurality of pores of a porous inorganic layer on a first glass substrate with a polymer solution or polymer emulsion, which is then dried to form a polymer material. An interlayer may be used to laminate the first glass substrate to a second glass substrate.