554 results about "Glass-ceramic" patented technology

The application discloses a transparent strengthened glass ceramic with high stress depth, which contains spinel crystals and zirconia crystals in a crystal phase of the strengthened glass ceramic, and does not contain Li-containing crystals; the strengthened glass ceramic has a compressive stress region extending from a surface thereof to a compression depth, a compressive stress layer depth DOL_0 of the strengthened glass ceramic is greater than or equal to 14% of a thickness of the strengthened glass ceramic, and a tensile stress line density of the strengthened glass ceramic is greater than or equal to 25000 MPa / mm. By introducing more Li ions and Na ions into a spinel glass ceramic component, the prepared transparent spinel glass ceramic can be chemically strengthened, a transparent strengthened glass ceramic with high CS, DOL_0, CT_AV and CT_LD is obtained, and the strengthened glass ceramic exhibits excellent drop resistance.

The invention discloses fluorescent glass ceramic, a preparation method thereof and a luminescent device, and belongs to the technical field of luminescent materials. The fluorescent glass ceramic comprises glass powder and fluorescent powder, the glass powder comprises zinc borosilicate glass powder; the zinc borosilicate glass powder comprises the following components in percentage by mole: 5%-20% of SiO2, 10%-35% of B2O3, 20%-65% of ZnO, 0.3%-15% of P2O5, 2%-20% of RO and 0.1%-15% of R2O, RO is selected from at least one of MgO, CaO, SrO and BaO, and R2O is selected from at least one of Li2O, Na2O and K2O; the fluorescent powder comprises blue-green fluorescent powder; the emission peak wavelength of the blue-green fluorescent powder is 480-510 nm; based on the total mass of the glass powder and the fluorescent powder, the mass percentage content of the glass powder is 30-80%, and the mass percentage content of the fluorescent powder is 20-70%. The fluorescent glass ceramic is high in reliability and can be applied to high-power light emitting, a light emitting device formed by combining the fluorescent glass ceramic and a proper light source can provide an accurate azure light emitting effect, and the requirements in application scenes with harsh color requirements are met.

The present invention relates to crystallized glass which has a crystalline phase and contains, in molar percentages in terms of oxides, 55-72% of SiO2, 1.3-4.5% of Al2O3, 15-28% of Li2O, 0.5-5.0% of P2O5, and 0.5-4.4% of ZrO2, wherein: with respect to the total of SiO2, Al2O3, and Li2O, the ratio of SiO2 is 68.5-76.0%, the ratio of Al2O3 is 2.20-4.40%, and the ratio of Li2O is 23.0-28.5%; the content ratio of Li2Si2O5 crystal is 40 mass% or more; and the Poisson's ratio is 0.20 or more.

The invention provides an arc-shaped microcrystalline glass plate structure performance detection system, and belongs to the technical field of material performance testing. The system comprises a rack, a sample table, an impact mechanism, a swing rod, a swing part, a driving assembly and a medium taking and supplying assembly, the sample table is provided with an arc-shaped supporting surface and a medium cavity; the impact mechanism is positioned above the arc-shaped supporting surface; the swing rod is provided with a sliding channel. The bottom end of the swinging piece is used for driving the sample table to rotate; the driving assembly comprises a rotating output shaft, a transmission arm and a transmission sliding block which are connected in sequence, the rotating output shaft is connected to the rack and is parallel to the rotating shaft of the swing rod, and the transmission sliding block is contained in the sliding channel in a sliding mode; the medium taking and supplying assembly comprises a piston barrel and a piston rod, the piston barrel is fixedly connected with the swing rod and provided with a one-way inflow port and a one-way outflow port communicated with the medium cavity, a piston of the piston rod is slidably sealed with the piston barrel, and a rod body is in transmission connection with the transmission sliding block. The system can realize multi-position and variable-temperature detection, and the detection reliability is higher.

The present invention relates to a glass ceramic having a three-dimensional shape including plural R-shapes including a smallest R-shape whose average radius of curvature is 5.0×102 mm or less and a largest R-shape whose average radius of curvature is 1.0×103 mm or more, having a maximum value of retardations of 20 nm / mm or less, and having a haze value converted into a value corresponding to a thickness of 0.8 mm of 1.0% or less in the largest R-shape.

A transparent, chemically prestressable or chemically prestressed glass ceramic has a high transmittance, a low haze and a high crystal phase content of keatite solid solution. A method of making such a glass ceramic includes producing a silicate green glass with a melting process and subsequent hot shaping, temperature treating the silicate green glass with at least one nucleation step carried out in the temperature range of 690° C. to 850° C. for a period of 5 min to 72 h and at least one ceramization step carried out in the temperature range of 780° C. to 1100° C. for a period of 3 min to 150 h, and performing at least one ion exchange in an exchange bath at a temperature of the exchange bath between 370° C. and 500° C. for a period of between 2 hours and 50 hours.

The application provides a spinel glass ceramic and applications thereof. By having a specific composition and crystal phase structure, the spinel glass ceramic not only has high intrinsic strength, but also can ensure that the spinel glass ceramic has a desired stress structure after chemical strengthening treatment, especially an ultrahigh compressive stress layer depth and a large deep stress. The spinel glass ceramic can be used to prepare a strengthened spinel glass ceramic with high mechanical strength and damage resistance.

The invention belongs to the technical field of electronic ceramic substrate materials, and particularly relates to a preparation method of a microcrystalline glass composite silicon nitride ceramic substrate, which is prepared from the following raw materials: 1-5% of alpha-phase silicon nitride powder, 86-95% of beta-phase silicon nitride powder, 0.2-3% of metal silicon powder, 2.5-8% of glass powder and 1.3-8% of metal oxide. The preparation method comprises the following steps: S1, mixing and grinding raw materials to obtain ceramic slurry; s2, adding Arabic gum into the ceramic slurry as a binder, and carrying out spray granulation; granulation powder is obtained; s3, carrying out dry pressing molding and cold isostatic pressing treatment on the granulation powder to prepare a ceramic plate blank; and S4, sintering and crystallizing the ceramic plate blank. According to the invention, the glass ceramic powder is introduced as a sintering aid and a second phase, and the sintering temperature of the silicon nitride is obviously reduced from the conventional temperature of more than 1800 DEG C to 1500 DEG C by utilizing the liquid phase effect of the glass ceramic powder in the sintering process, so that two modes of air pressure sintering and normal pressure sintering can be used, and the energy consumption and the requirements on equipment are reduced.

The invention discloses an LTCC (Low Temperature Co-Fired Ceramic) material with a controllable shrinkage rate and a preparation method thereof. The material comprises microcrystalline glass A and a glass devitrification material B, wherein the glass devitrification material B is obtained by devitrifying microcrystalline glass C according to a specific temperature system. The glass ceramic A and the glass ceramic C have different softening temperatures. And accurately regulating and controlling the crystallization state of the glass crystallization material B by regulating and controlling the crystallization treatment temperature and / or crystallization treatment time of the microcrystalline glass C. The LTCC substrate prepared from the LTCC material can be co-fired with a silver conductor while ensuring sintering compactness and excellent high-frequency performance, and the sintering shrinkage rate is controllable in the range of 14%-18% on the X / Y axis.

The invention discloses a low-dielectric low-loss high-strength borosilicate glass ceramic composite material and a preparation method thereof, and belongs to the technical field of borosilicate glass ceramic composites.The low-dielectric low-loss high-strength borosilicate glass ceramic composite material is prepared from, by weight, 70% of low-alkali borosilicate glass ceramics with the low borosilicate ratio, 29% of Al2O3 and 1% of Bi2O3. The preparation method comprises the following steps: preparing low-alkali borosilicate glass ceramics with a high borosilicate ratio, melting the low-alkali borosilicate glass ceramics with the high borosilicate ratio and amorphous SiO2 at a set temperature to obtain the required low-alkali borosilicate glass ceramics with the low borosilicate ratio, and finally mixing and ball-milling the crushed and ground low-alkali borosilicate glass ceramics with Al2O3 and Bi2O3 to obtain the low-alkali borosilicate glass ceramics with the low borosilicate ratio. And finally, the borosilicate glass ceramic composite material is sintered at the temperature of 880-900 DEG C. The borosilicate microcrystalline glass ceramic composite material is low in dielectric, low in loss and high in strength.

The invention discloses bismuthate glass. The bismuthate glass is prepared from the following main raw materials: 50 to 83 weight percent of Bi2O3, 10 to 20 weight percent of B2O3, 3 to 10 weight percent of ZnO, 3 to 10 weight percent of SiO2 and 3 to 10 weight percent of Al2O3; 0-4wt% of TiO2 is added on the basis of the total weight of the main raw materials. The invention further discloses a coating based on the bismuthate glass. The reflection performance of the glass coating is remarkably improved, the radiation refrigeration effect of the glass ceramic coating is remarkably improved, and the glass ceramic coating has the radiation protection, insulation and anti-static effects.

The invention discloses microcrystalline glass with excellent mechanical properties and weather resistance. Main crystalline phases of the microcrystalline glass are petalite and silicon lithium stone; the overall crystallinity of the microcrystalline glass is 85% or above; the mass fraction of Na2O on the surface of the microcrystalline is 1%-5%, the mass fraction of K2O is 1%-3%, the mass fraction ratio of Na2O to K2O is 1-3, and the microcrystalline glass is prepared through melting, heat treatment, slicing and two times of chemical strengthening. By designing a two-strong process with proper surface K2O and Na2O concentrations, the weatherability performance better than that in the prior art is obtained, and meanwhile, the performance of 4PB / ROR / falling ball / abrasive paper is improved to a certain extent.

The invention discloses oil shale waste / fly ash glass ceramics as well as a preparation method and application thereof, relates to the technical field of glass ceramics, and solves the problems that in the prior art, OSA post-treatment is serious in environmental harm and low in resource utilization rate, and when OSA is applied to glass ceramics preparation, the crystal phase structure is unstable, the process controllability is poor, and the production cost is high. And high quality, low cost and sustainable utilization of the microcrystalline glass are difficult to realize at the same time. The oil shale waste / fly ash glass ceramic is prepared from 80 parts of industrial waste residues, 4-6 parts of nucleating agent and 14-16 parts of auxiliary components, the industrial waste residue is composed of 50-75 parts of oil shale residue and 5-30 parts of fly ash; the preparation method comprises the following steps: mixing the oil shale waste with the fly ash, adding the nucleating agent and the auxiliary components, grinding, melting, preserving heat, pouring the melt into a mold, and annealing to obtain base glass; and carrying out polishing treatment and heat treatment on the base glass to obtain the microcrystalline glass. The invention can be applied to the fields of building decoration and electrical insulating materials.

Glass and glass-ceramic compositions having a combination of lithium silicate and petalite crystalline phases are described, as well as methods of making the glass and glass-ceramic compositions. The compositions are compatible with conventional rolling and float processes, are transparent or translucent, and have high mechanical strength and fracture resistance. In addition, the compositions can be chemically tempered into glass-ceramics of even higher strength, which can be used as large substrates in a variety of applications.

Provided are a lithium disilicate glass-ceramic green body, a preparation method therefor, and a use thereof. The lithium disilicate glass-ceramic green body comprises a lithium disilicate main crystal phase, crystal size in the lithium disilicate glass-ceramic blank being between 50 and 400 nm, and the proportion of the area of crystal grains having a length greater than 350 nm to the total area being less than 30%. The present disclosure, by means of controlling the internal crystal size of the lithium disilicate glass-ceramic green body to be below 400 nm, enables same to be directly machined without damaging the machining equipment, and combines the advantages of high strength, machinability and direct coloration. This can reduce the waiting time for patients to receive dental restorations, solve the problem of patients being unable to know the color of all-ceramic dentures before fabrication, and overcome a bottleneck for all-ceramic denture restoration materials for same-day delivery. It has great significance for achieving preoperative color matching and rapid restoration in clinical practice.

The invention discloses an amorphous pan-magnesia refractory castable, which is mainly characterized in that forsterite and recycled waste magnesia-calcium bricks are remade into a refractory aggregate, and the refractory aggregate is mixed with a magnesia refractory raw material aggregate, magnesia refractory raw material powder, a binding agent, a dispersing agent and explosion-proof fibers to prepare the amorphous pan-magnesia refractory castable. The device can be used for production equipment of high-temperature processes such as steelmaking, cement, glass ceramics and the like.

The invention belongs to the technical field of microcrystalline glass materials, and particularly discloses rare earth doped silicate system high-crystallinity transparent microcrystalline glass and a preparation method thereof. The microcrystalline glass is prepared from the following raw materials: black talcum powder, CaO, AlF3, YF3, rare earth ions, graphite powder, Si3N4, a clarifying agent, micron-sized seed crystals and the like through a high-temperature melting process and controllable nucleation-crystallization. The preparation method is simple, the used raw materials are rich, the preparation process is simple, and the prepared high-crystallinity transparent microcrystalline glass can be effectively excited by 420 nm purple light and has the characteristics of high crystallinity, high transmittance, high luminous efficiency, excellent thermal quenching resistance and the like. A main crystal phase is CaAl2Si2O8 and a small amount of YF3, the crystallinity is larger than or equal to 70 vol.%, the transmittance of a 1 mm sample is larger than or equal to 80%, the emission peak value is adjustable between 480 nm and 520 nm, the internal quantum efficiency is larger than or equal to 80%, the luminous intensity at the temperature of 150 DEG C is 85% or above of the luminous intensity at the room temperature, and the material can be widely applied to the fields of white light illumination, screen display and the like.

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 glass ceramic that contains a glass containing Si, B, Al, and Zn and aggregates. The glass has a SiO2 content of 20% by weight to 55% by weight, a B2O3 content of 15% by weight to 30% by weight, Al2O3, and ZnO, wherein a weight ratio of the SiO2 to the B2O3 (SiO2 / B2O3) is 1.21 or higher, and a weight ratio of the Al2O3 to the ZnO (Al2O3 / ZnO) is 0.8 to 1.3. A TiO2 content, a ZrO2 content, a SnO2 content, and a SrO content in the glass each are 0% by weight to 5% by weight. The aggregates include 20% by weight to 50% by weight of SiO2, 1% by weight to 10% by weight of TiO2, 3% by weight or less of ZrO2, and 1% by weight or less of ZnO each relative to the weight of the glass ceramic.

A method for melting and / or refining glass, glass ceramic or glass which can be ceramized to form glass ceramic includes: providing a batch of raw materials; heating the batch until a melt of molten glass is obtained, the batch being heated at least in sections to a temperature above T3 which corresponds to a viscosity of the molten glass of 103 dPa*s; refining the melt, the melt being heated at least in sections to a temperature above T2.5 which corresponds to a viscosity of the molten glass of 102.5 dPa*s, refining of the melt includes adjusting an oxygen partial pressure p(O2) which is reduced by at least 60% relative to an O2 saturation in the melt at temperature T3; and obtaining a re-fined glass, a refined glass ceramic or a refined glass which can be ceramized to form glass ceramic.

The invention relates to the technical field of solid-state batteries, and discloses a composite oxide solid-state electrolyte, a low-temperature preparation method and application thereof, and a solid-state battery. The composite oxide solid electrolyte comprises a main phase and a second phase, the main phase comprises Li < 7-x > La < 3 > Zr < 2-x > Nb < x > O < 12 >, x is greater than or equal to 0.1 and less than or equal to 0.5, and the second phase comprises Li-B-O-N glass ceramic powder. The composite oxide solid electrolyte provided by the invention is formed by compounding niobium-doped LLZO serving as a main electrolyte and lithium boron oxygen nitrogen glass ceramic, and the technical problems of low ionic conductivity, high interface impedance, fragile mechanical property, cost rise caused by high-temperature sintering and the like of a traditional oxide electrolyte are solved. On the basis, a functional interface modification layer is further introduced, so that the properties such as ionic conductivity, interface impedance, critical current density and bending strength are further improved, and the cycle performance of a solid-state battery can be remarkably improved.

Disclosed is a substrate 1 for a semiconductor package, which contains a glass phase and a crystal phase, and has a rectangular shape having a substrate size of 300 mm × 300 mm or larger, or a circular shape having a diameter of 300 mm or more.

The invention belongs to the technical field of glass polishing, and particularly relates to a glass ceramic continuous polishing machine which comprises a positioning mechanism, a polishing mechanism and a polishing mechanism. The lifting mechanism is fixed at the top of the positioning mechanism; the polishing mechanism is fixed to the top of the lifting mechanism; the positioning mechanism comprises a lower plate and lower frames, and the lower plate is fixed to the ends of the multiple lower frames. The first driving part is fixed to the top of the lower plate; and the protective cylinder is fixed in the middle of the plurality of lower frames. The planetary gear is composed of the inner gear ring, the pinions and the center gear, the pinions and the supporting disc are fixed and cannot horizontally revolve, the rotating direction of the inner gear ring is opposite to the rotating direction of the synchronous cylinder, the rotating directions of the front polishing plate and the back polishing plate are opposite, the front polishing plate and the back polishing plate rub glass ceramics in two directions, and the polishing effect is improved. Glass ceramics can be polished by rotating in two directions, and the polishing effect is good.

The invention provides fluorescent glass ceramic, a preparation method thereof and a luminescent device. The fluorescent glass ceramic comprises glass powder and fluorescent powder; the fluorescent powder comprises blue-green fluorescent powder, and the emission peak wavelength of the blue-green fluorescent powder is 480-510 nm; the blue-green fluorescent powder comprises first fluorescent powder; the molecular formula of the first fluorescent powder is (Ba1-w-nAwRen) GxNyOz1Fz2, the crystal structure of the first fluorescent powder belongs to an orthogonal structure, and the first fluorescent powder is crystallized in a space group Pcca; based on the total mass of the glass powder and the fluorescent powder, the mass percentage content of the glass powder is 20%-80%, and the mass percentage content of the fluorescent powder is 20%-80%. The fluorescent glass ceramic disclosed by the invention can give consideration to the luminescent property of the fluorescent glass ceramic and the reliability and thermal stability of the luminescent property.

The invention belongs to the technical field of quantum dot glass ceramics, and relates to high-modulus multiphase quantum dot glass ceramics as well as a preparation method and application thereof. The microcrystalline glass comprises eucryptite (LiAlSiO4), lithium aluminate (LiAlO2) and quantum dots (CsPbBr3), wherein the eucryptite (LiAlSiO4) and the lithium aluminate (LiAlO2) are main crystalline phases. The surface of the LiAlO2 crystal phase is coated with the LiAlSiO4 crystal phase or gaps of the LiAlO2 crystal phase are filled with the LiAlSiO4 crystal phase to form a multi-phase reinforced structure, and the CsPbBr3 quantum dot glass ceramic has excellent water stability and deformation resistance. The preparation method comprises the following steps: respectively preparing a basic glass batch and a CsPbBr3 quantum dot precursor, and carrying out melting, water quenching and grinding on the glass batch to obtain basic glass powder; the preparation method comprises the following steps: placing a quantum dot precursor at the bottom of a platinum crucible by adopting a layered loading process, then covering basic glass powder, and finally obtaining the quantum dot microcrystalline glass through melting homogenization, casting molding and controlled heat treatment. The method is simple in process and high in controllability; the obtained product is excellent in comprehensive performance and good in application prospect.

This invention relates to the field of glass-ceramic technology, specifically providing a low-temperature co-fired ceramic, its preparation method, and its application. The raw materials for the low-temperature co-fired ceramic include VSBBS glass frit and ceramic frit, with the total weight of the VSBBS glass frit and ceramic frit being 100%. The mass percentages of the VSBBS glass frit and ceramic frit are 20-40% and 60-80%, respectively. The raw materials for the VSBBS glass frit, by mass percentage, include 10-30 wt% vanadium oxide, 10-30 wt% antimony oxide, 10-30 wt% barium oxide, 10-20 wt% boron oxide, and 30-50 wt% silicon oxide, with the sum of all oxides being 100%. The LTCC material obtained by this invention achieves excellent millimeter-wave dielectric properties, with a relative permittivity between 4.8 and 6.8, a dielectric loss less than or equal to 0.001, and a flexural strength of 180-230 MPa.

The invention discloses a high-temperature-resistant feeding machine and method for producing ion sieve glass, and relates to the technical field of glass ceramics. The high-temperature-resistant feeding machine comprises a three-axis track structure, a clamp structure and a feeding structure; the clamp structure is assembled on the three-axis track structure and is driven by the three-axis track structure to realize multi-dimensional space movement, and the feeding structure is clamped by the clamp structure to be hoisted on the three-axis track structure; the three-axis track structure is adopted for hoisting the feeding structure so that three-dimensional space movement of the feeding structure can be achieved, the feeding structure can move regularly and circularly along a feeding port of the circular kiln, the space structure of the feeding structure is reduced so that the feeding structure can be suitable for a small-sized kiln, and the feeding structure is compatible with a square track and the circular kiln; and secondly, a double-layer spiral conveying system composed of an upper spiral assembly and a lower spiral assembly is adopted, a caliber adjustable structure is installed in an inner cavity of the lower spiral assembly so that the sectional area of a discharging channel can be dynamically adjusted, and the precise regulation and control over the material conveying amount are achieved.

1. The name of the design product: cross drill bit. 2. The use of the design product: for electric drill, glass ceramic tile marble and other material drilling. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view 1.

The invention relates to glass ceramics, in particular to transparent glass ceramics with a blue light blocking function and a preparation method of the transparent glass ceramics, and the transparent glass ceramics comprise the following components in percentage by weight: 45-65% of SiO2; 10% to 30% of Al2O3; 0 to 15% of MgO; 0 to 15% of ZnO; the transparent glass ceramic with the blue light blocking function has the advantages that the Mohs hardness of the transparent glass ceramic is larger than 6, the light transmittance of the transparent glass ceramic with the thickness of 1 mm is larger than 85%, the blue light blocking rate of the transparent glass ceramic with the blue light blocking function is larger than 30%, and the transparent glass ceramic with the blue light blocking function is high in light transmittance and blue light blocking rate.

The present invention provides a chemically strengthened glass ceramic and a preparation thereof, the chemically strengthened glass ceramic comprises a glass ceramic matrix and a compressive stress layer formed on the surface of the matrix through chemical strengthening by ion exchange, the glass ceramic matrix comprises a crystal family 1 and a crystal family 2, the crystal family 1 comprises a crystal with the following structural formula: (ZnxMg1-x-yAl2-2y) (Al2yMgy) O4, wherein x is more than or equal to 0 and less than or equal to 1; 0 < = y < = 1; 0 < = x + y < = 1; the crystal family 2 comprises zirconium oxide; and the compression stress layer has a CTLDsaf value of 15000 to 70000 Mpa (Cyclic Transfer Layer Discharge Saf). Compared with an existing LAS microcrystalline glass system, the chemically strengthened microcrystalline glass has excellent mechanical properties and impact resistance, and the total cost is greatly reduced.