307 results about "Vitrification" patented technology

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 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.

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.

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.

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.

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 present invention provides a polytetrafluoroethylene sealing material and a preparation method thereof, and belongs to the technical field of sealing materials, the polytetrafluoroethylene sealing material comprises the following components by weight: 100 parts of polytetrafluoroethylene and 10-40 parts of a filler, and the filler comprises boron nitride and a polyvinylidene fluoride coating layer coating the surface of boron nitride. The boron nitride filler with the surface coated with polyvinylidene fluoride is introduced into a polytetrafluoroethylene matrix, so that the comprehensive performance of the sealing material is remarkably improved. The wear resistance is greatly enhanced by boron nitride through a pinning effect, and a constructed high-thermal-conductivity network can effectively export friction heat, so that the interface temperature is lower than the glass transition point of polytetrafluoroethylene to maintain rigidity; meanwhile, the polyvinylidene fluoride coating layer realizes covalent crosslinking through dehydrofluorination reaction with polytetrafluoroethylene, so that the mechanical strength and the interface bonding force of the material are remarkably improved.

This invention provides a method for removing a portion of a crystalline material (e.g., SiC) substrate. [Solution] The method involves bonding the surface of a substrate 172 to a rigid support 176 (for example, with a thickness of >800 μm). A subsurface laser-damaged region 173 is provided at a certain depth relative to the surface within the substrate. The substrate may be bonded to the support 176 by an adhesive material 174 having a glass transition temperature greater than 25°C. The crystalline material is fractured along the subsurface laser-damaged region 173 to create a bonded assembly comprising the support and a portion of the crystalline material. The fracture of the crystalline material is facilitated by (i) applying a mechanical force in close proximity to at least one support edge to impart a bending moment to the support, (ii) cooling the support if the support has a larger coefficient of thermal expansion than the crystalline material, and / or (iii) applying ultrasonic energy to the crystalline material.

The invention discloses a material with a moisture permeable function and a preparation method and application thereof, the material comprises a base layer and a composite adhesive layer, and the composite adhesive layer is composed of a shape memory polymer with a glass transition temperature of 28-40 DEG C; the composite adhesive layer and the base layer are provided with holes corresponding in position, the hole diameter of the holes ranges from 0.1 cm to 0.2 cm, and the center distance between every two adjacent holes ranges from 0.8 cm to 1.0 cm. The opening of the material is automatically opened when the temperature is higher than the glass-transition temperature, and is automatically closed when the temperature is lower than the glass-transition temperature.

Disclosed herein are polyesteramide random copolymers having high glass transition temperatures, methods of forming such polymers, devices, formulations, and medical devices comprising such polymers, and methods of using such polymers in combination with bioactive agents to treat mammals suffering from various conditions. In one embodiment, the random copolymers may have a Tg greater than body temperature, about 37°C, and may achieve longer release durations, different release rates, improved barrier properties, or other advantages relative to polymers having a Tg less than 37°C.

The invention relates to a composition comprising: a poly(ether ketone ketone), PEKK1; a thermoplastic polyimide having a glass transition temperature greater than or equal to 230°C, TPI; and optionally, a poly(aryl ether ketone), PAEK, PAEK being distinct from PEKK1. PEKK1 represents at least 50% by weight, relative to the total weight of PEKK1, TPI and, where applicable, PAEK, of the composition. PAEK is necessarily present when the TPI content is greater than or equal to 20% by weight, and preferably when the TPI content is greater than or equal to 15% by weight, relative to the total weight of PEKK1 and TPI of the composition.

The invention discloses a method for evaluating seawater resistance of a cyanate ester-based composite material for a structural material, and belongs to the field of material performance testing, and the method comprises the following steps: S1, preparing a sample plate of the cyanate ester-based composite material for seawater resistance testing, and cutting the sample plate into a sample sheet I, a sample sheet II and a sample sheet III; s2, soaking the sample piece I, the sample piece II and the sample piece III, and sampling and testing at different time nodes; s3, obtaining a fitting equation about the water absorption rate, the interlayer shear strength and the glass transition temperature; s4, converting into a long-time fitting equation; s5, calculating an evaluation score; s6, comparing the evaluation score S with the required score of the allowable value of the cyanate ester matrix composite to obtain an evaluation conclusion; the evaluation score is calculated through fitting equations corresponding to the water absorption rate, the interlaminar shear strength and the glass transition temperature, and the method is used for predicting the seawater resistance of the cyanate ester matrix composite for the structural material.

The invention relates to a composition for use in a long-term latent heat storage device, the composition comprising a non-eutectic mixture of a crystallizing phase-change material and a vitrifying phase-change material.

The present application relates to the technical field of underwater acoustic transducer, in particular to a method for preparing curved piezoelectric composite material by using shape memory high polymer material, comprising the following steps: step 1: according to the required shape and size, corresponding shape memory high polymer material pouring tooling is prepared; step 2: shape memory high polymer material is poured and solidified; step 3: the solidified shape memory high polymer material is taken out, heated to above its glass transition temperature to soften, then clamped flat with two metal plates, and then cooled into flat plate type shape memory high polymer material; step 4: piezoelectric ceramic plate is firmly pasted on the flat plate type shape memory high polymer material; step 5: a series of cutting is carried out on the piezoelectric ceramic along the X direction, and a series of cutting is carried out on the piezoelectric ceramic along the Y direction, the curved piezoelectric composite material is prepared by the method, the curved surface is uniform and controllable, the preparation process is simple and easy to operate, and the method is suitable for large-scale production of various curved piezoelectric composite materials.

The present invention relates to a glass transition material for a circulating fluidized bed (CFB) and its preparation and use methods, belonging to the technical field of comprehensive utilization of CFB fly ash. The glass transition material is prepared from 85-100 parts by weight of manganese monoxide, 5-30 parts by weight of niobium nitride, 5-15 parts by weight of polyoxyethylene lauryl ether, and 15-40 parts by weight of water. During preparation, polyoxyethylene lauryl ether and water are first mixed, followed by the addition of manganese monoxide and niobium nitride, and vigorous stirring in a blender. The present invention utilizes polyoxyethylene lauryl ether to uniformly disperse manganese monoxide and niobium nitride in a coal sample. The mineralization effect of manganese monoxide and niobium nitride reduces the liquid phase formation temperature and liquid phase viscosity, increases the liquid phase ratio, and promotes the glass transition of CFB fly ash. Furthermore, nitrogen generated by the high temperature of niobium nitride creates pores, increasing the content of hollow microspheres in the CFB fly ash.